TWI468022B - Display device and color adjustment method thereof, and method for display video signal - Google Patents
Display device and color adjustment method thereof, and method for display video signal Download PDFInfo
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Description
本發明是有關於一種色彩調整技術，且特別是有關於一種顯示裝置之色彩調整技術。The present invention relates to a color adjustment technique, and more particularly to a color adjustment technique for a display device.
隨著科技之進步，人們對於視訊影像之畫面品質也愈來愈講究。現行的顯示裝置之色彩調整技術主要可分為調整亮度(Intensity)、色調(Hue)與飽和度(Saturation)。由於在紅、綠、藍(分別簡稱R、G、B)色彩空間(Color Space)中之R、G、B之間有很高的色彩關連性，為了方便調整色彩與亮度，因此傳統技術常將RGB色彩空間轉換到HSI色彩空間，其中H代表色調(Hue)，S代表飽和度(Saturation)，I代表亮度(Intensity)。例如以下列公式(1)~(3)將RGB色彩空間轉換成HSI色彩空間：H=θ若B≦G，H=360-θ若B>G，其中
承上述，在HSI色彩空間中即可輕易地調整H、S、I。接著則可對畫面中之各畫素調整其H，例如每一個畫素之H皆加上30。也可對畫面中之各畫素調整其S，例如每一個畫素之S皆加上30。也可對畫面中之各畫素調整其I，例如每一個畫素之I皆加上30。換句話說，上述作法皆針對畫面之各畫素進行調整H、S或I。然而畫面中並非每一個畫素皆需要進行調整，因此上述作法會造成不需進行調整之畫素產生色彩或亮度失真的問題。In view of the above, H, S, and I can be easily adjusted in the HSI color space. Then, you can adjust the H of each pixel in the picture. For example, H for each pixel is 30. It is also possible to adjust the S of each pixel in the picture, for example, 30 for each pixel. It is also possible to adjust the I of each pixel in the picture, for example, I add 30 to each pixel. In other words, the above method adjusts H, S or I for each pixel of the picture. However, not every pixel in the picture needs to be adjusted. Therefore, the above method causes a problem that the pixels that do not need to be adjusted have color or brightness distortion.
承上述，習知技術便發展出調整畫面中之子畫面之畫素之H、S或I。然而上述之作法則會使得子畫面之邊界產生色彩不連續之現象。In view of the above, the prior art develops H, S or I which adjusts the pixels of the sub-pictures in the picture. However, the above method causes the color of the boundary of the sub-picture to be discontinuous.
本發明提供一種顯示裝置，其調整具有特定範圍之色調、飽和度或亮度之畫素群之色調、飽和度或亮度，以改善畫面的品質。The present invention provides a display device that adjusts the hue, saturation, or brightness of a pixel group having a specific range of hue, saturation, or brightness to improve the quality of a picture.
本發明提供一種顯示裝置，其統計各色調之畫素數目，並依此調整部分或全部畫面的色調、飽和度或亮度，以增進畫面的可適度。The present invention provides a display device that counts the number of pixels of each color tone and adjusts the hue, saturation, or brightness of some or all of the pictures accordingly to enhance the appropriateness of the picture.
本發明提供一種顯示視訊訊號之方法，針對具有特定範 圍之色調、飽和度或亮度之畫素群，調整其色調、飽和度或亮度，使畫面之色彩更為亮麗。The invention provides a method for displaying a video signal, which has a specific range The color, saturation, or brightness of the pixel group, adjust its hue, saturation, or brightness to make the color of the picture brighter.
本發明提供一種顯示視訊訊號之方法，依據各色調之畫素數目調整其色調，以增進畫面的品質。The invention provides a method for displaying a video signal, and adjusting the color tone according to the number of pixels of each color tone to improve the quality of the picture.
本發明提出一種顯示裝置，其包括視訊訊號接收器、色彩引擎以及輸出級。其中視訊訊號接收器，用以接收至少一視訊訊號。色彩引擎包括局部調整單元，依據HSI色彩空間中畫素的亮度將視訊訊號的畫面之多個畫素分割為多個畫素群，其中H代表色調，S代表飽和度，I代表亮度，並在不改變HSI色彩空間之複數條色軸之條件下，藉由將畫素群中具有亮度在預設範圍內一特定畫素群的畫素於HSI色彩空間中所佔據之一區域移動至另一區域，來調整特定畫素群的亮度，俾以局部地調整在HSI色彩空間中特定畫素群之畫素的亮度，而不改變畫面在HSI色彩空間中除了特定畫素群以外的任何其它畫素群的畫素的亮度，其中預設範圍為全域亮度的一部分。輸出級耦接於色彩引擎，用以輸出調整後之視訊訊號。The invention provides a display device comprising a video signal receiver, a color engine and an output stage. The video signal receiver is configured to receive at least one video signal. The color engine includes a local adjustment unit that divides a plurality of pixels of the image of the video signal into a plurality of pixel groups according to the brightness of the pixels in the HSI color space, where H represents a hue, S represents saturation, and I represents brightness, and Moving one area occupied by a pixel of a pixel group having a brightness within a preset range in the HSI color space to another one without changing the plurality of color axes of the HSI color space The area, to adjust the brightness of a particular pixel group, to locally adjust the brightness of the pixels of a particular pixel group in the HSI color space without changing any picture other than the specific pixel group in the HSI color space. The brightness of the pixels of the prime group, where the preset range is part of the global brightness. The output stage is coupled to the color engine for outputting the adjusted video signal.
本發明提出一種顯示裝置，其包括色彩引擎、亮度統計單元以及輸出級。色彩引擎用以接收至少一視訊訊號，並調整視訊訊號的HSI色彩空間中畫面之多個畫素，其中H代表色調，S代表飽和度，I代表亮度，畫面之畫素依據畫素的亮度被分割為多個畫素群，畫素群的各個畫素群具有亮度在預設範圍內的亮度，其中預設範圍為全域亮度的一部分，色彩引擎包括亮度統計單 元，用以統計視訊訊號之畫面之各畫素群之畫素數量以將其提供給色彩引擎，色彩引擎則依據在HSI色彩空間中各畫素群之畫素數量調整視訊訊號，其中各畫素群具有色調在一預設範圍內的色調，預設範圍為全域色調的一部分。輸出級，耦接於色彩引擎，用以輸出調整後之視訊訊號。The invention provides a display device comprising a color engine, a brightness statistics unit and an output stage. The color engine is configured to receive at least one video signal and adjust a plurality of pixels of the picture in the HSI color space of the video signal, where H represents a hue, S represents a saturation, and I represents a brightness, and the picture is based on the brightness of the pixel. Divided into a plurality of pixel groups, each pixel group of the pixel group has brightness within a preset range, wherein the preset range is a part of the global brightness, and the color engine includes a brightness statistics sheet. Yuan, which is used to count the number of pixels of each pixel group of the video signal to provide it to the color engine, and the color engine adjusts the video signal according to the number of pixels of each pixel group in the HSI color space, wherein each picture The prime group has a hue of a hue within a predetermined range, and the preset range is a part of the global hue. The output stage is coupled to the color engine for outputting the adjusted video signal.
本發明提出一種顯示至少一視訊訊號之方法，包括下列步驟。接收至少一視訊訊號。依據HSI色彩空間中畫素的亮度將視訊訊號之畫面之多個畫素分割為多個畫素群，其中H代表色調，S代表飽和度，I代表亮度。在不改變HSI色彩空間之複數條色軸之條件下，調整畫素群中特定畫素群的亮度，俾以局部地調整在HSI色彩空間中特定畫素群的亮度，而不改變除了特定畫素群以外的任何其它畫素群的亮度，其中特定畫素群具有在預設範圍內的亮度，預設範圍為全域亮度的一部分。The present invention provides a method of displaying at least one video signal, including the following steps. Receive at least one video signal. The plurality of pixels of the picture of the video signal are divided into a plurality of pixel groups according to the brightness of the pixels in the HSI color space, where H represents a hue, S represents saturation, and I represents brightness. Adjusting the brightness of a particular pixel group in the pixel group without changing the complex color axis of the HSI color space, and locally adjusting the brightness of a particular pixel group in the HSI color space without changing the specific picture The brightness of any other pixel group other than the prime group, where the specific pixel group has a brightness within a preset range, and the preset range is a part of the global brightness.
本發明提出一種顯示至少一視訊訊號之方法，包括下列步驟。接收至少一視訊訊號。將視訊訊號之一畫面之多個畫素分割為多個畫素群，其中各畫素群具有亮度在預設範圍內的亮度，預設範圍為在HSI色彩空間中之全域亮度的一部分，其中H代表色調，S代表飽和度，I代表亮度。統計各畫素群之畫素數量。依據在HSI色彩空間中各畫素群之畫素數量調整視訊訊號。The present invention provides a method of displaying at least one video signal, including the following steps. Receive at least one video signal. Dividing a plurality of pixels of one of the video signals into a plurality of pixel groups, wherein each pixel group has brightness within a preset range, and the preset range is a part of the global brightness in the HSI color space, wherein H stands for hue, S stands for saturation, and I stands for brightness. Count the number of pixels in each pixel group. The video signal is adjusted according to the number of pixels of each pixel group in the HSI color space.
本發明提出一種顯示裝置，其包括視訊訊號接收器、色彩引擎以及輸出級。視訊訊號接收器用以接收至少一視訊訊號。色彩引擎包括局部調整單元，依據HSI色彩空間中畫素的飽和度 將視訊訊號的畫面之多個畫素分割為多個畫素群，其中H代表色調，S代表飽和度，I代表亮度，並在不改變HSI色彩空間之複數條色軸之條件下，藉由將畫素群中具有飽和度在預設範圍內的特定畫素群的畫素於HSI色彩空間中所佔據之一區域移動至另一區域，來調整畫素群中特定畫素群的飽和度，俾以局部地調整在HSI色彩空間中特定畫素群之畫素的飽和度，而不改變畫面在HSI色彩空間中除了特定畫素群以外的任何其它畫素群的畫素的飽和度，其中預設範圍為全域飽和度的一部分。輸出級耦接於色彩引擎，用以輸出調整後之視訊訊號。The invention provides a display device comprising a video signal receiver, a color engine and an output stage. The video signal receiver is configured to receive at least one video signal. The color engine includes a local adjustment unit based on the saturation of the pixels in the HSI color space. Dividing a plurality of pixels of the video signal into a plurality of pixel groups, wherein H represents a hue, S represents saturation, and I represents brightness, and without changing a plurality of color axes of the HSI color space, by Adjusting the saturation of a specific pixel group in a pixel group by moving a pixel of a pixel group having a saturation within a preset range to one region occupied by the HSI color space to another region , to locally adjust the saturation of the pixels of a particular pixel group in the HSI color space without changing the saturation of the pixels of any other pixel group except the specific pixel group in the HSI color space. The preset range is part of the global saturation. The output stage is coupled to the color engine for outputting the adjusted video signal.
本發明提出一種顯示至少一視訊訊號之方法，包括下列步驟。接收至少一視訊訊號。依據HSI色彩空間中畫素的飽和度將視訊訊號之畫面之多個畫素分割為多個畫素群，其中H代表色調，S代表飽和度，I代表亮度。在不改變HSI色彩空間之複數條色軸之條件下，調整畫素群中特定畫素群的飽和度，俾以局部地調整在HSI色彩空間中特定畫素群的飽和度，而不改變除了特定畫素群以外的任何其它畫素群的飽和度，其中特定畫素群具有在預設範圍內的飽和度，預設範圍為全域飽和度的一部分。The present invention provides a method of displaying at least one video signal, including the following steps. Receive at least one video signal. The plurality of pixels of the picture of the video signal are divided into a plurality of pixel groups according to the saturation of the pixels in the HSI color space, where H represents a hue, S represents saturation, and I represents brightness. Adjusting the saturation of a particular pixel group in the pixel group without changing the complex color axis of the HSI color space, and locally adjusting the saturation of a particular pixel group in the HSI color space without changing The saturation of any other pixel group other than a particular pixel group, where the particular pixel group has saturation within a preset range, the preset range being part of the global saturation.
本發明提出一種顯示裝置，其包括視訊訊號接收器、色彩引擎以及輸出級。視訊訊號接收器用以接收至少一視訊訊號。色彩引擎包括局部調整單元，依據HSI色彩空間中畫素的色調將視訊訊號的畫面之多個畫素分割為多個畫素群，其中H代表色調，S代表飽和度，I代表亮度，並在不改變HSI色彩空間之複數 條色軸之條件下，藉由將畫素群具有色調在預設範圍內的中特定畫素群的畫素於HSI色彩空間中所佔據之一區域移動至另一區域，來調整畫素群中特定畫素群的色調，俾以局部地調整特定畫素群之畫素的色調，而不改變該畫面在HSI色彩空間中除了特定畫素群以外的任何其它畫素群的畫素的色調，其中預設範圍為全域色調的一部分。輸出級耦接於色彩引擎，用以輸出調整後之視訊訊號。The invention provides a display device comprising a video signal receiver, a color engine and an output stage. The video signal receiver is configured to receive at least one video signal. The color engine includes a local adjustment unit that divides a plurality of pixels of the image of the video signal into a plurality of pixel groups according to the hue of the pixels in the HSI color space, where H represents a hue, S represents saturation, and I represents brightness, and Does not change the plural of the HSI color space Under the condition of the bar color axis, the pixel group is adjusted by moving the pixels of the pixel group having the hue in the preset range to one region occupied by the HSI color space to another region. The hue of a particular pixel group, which locally adjusts the hue of the pixels of a particular pixel group without changing the hue of the pixels of any other pixel group except the specific pixel group in the HSI color space. , where the preset range is part of the global tones. The output stage is coupled to the color engine for outputting the adjusted video signal.
本發明提出一種顯示至少一視訊訊號之方法，包括下列步驟。接收至少一視訊訊號。依據HSI色彩空間中畫素的色調將視訊訊號之畫面之多個畫素分割為多個畫素群，其中H代表色調，S代表飽和度，I代表亮度。在不改變HSI色彩空間之複數條色軸之條件下，調整畫素群中特定畫素群的色調，俾以局部地調整在HSI色彩空間中特定畫素群的色調，而不改變除了特定畫素群以外的任何其它畫素群的色調，其中特定畫素群具有在預設範圍內的色調，預設範圍為全域色調的一部分。The present invention provides a method of displaying at least one video signal, including the following steps. Receive at least one video signal. The plurality of pixels of the picture of the video signal are divided into a plurality of pixel groups according to the hue of the pixels in the HSI color space, where H represents a hue, S represents saturation, and I represents brightness. Adjusting the hue of a particular pixel group in the pixel group without changing the multi-color axis of the HSI color space, and locally adjusting the hue of the specific pixel group in the HSI color space without changing the specific picture The hue of any other pixel group other than the prime group, where the specific pixel group has a hue within a preset range, and the preset range is a part of the global hue.
本發明因針對具有特定範圍之色調、飽和度或亮度之各個畫素群分別調整各個畫素群之色調、飽和度或亮度，因此提升了畫面品質。The present invention improves the picture quality by adjusting the hue, saturation, or brightness of each pixel group for each pixel group having a specific range of hue, saturation, or brightness.
為讓本發明的上述特徵和優點能更明顯易懂，下文特舉實施例，並配合所附圖式作詳細說明如下。The above described features and advantages of the invention will be apparent from the following description.
10‧‧‧視訊訊號接收器10‧‧‧Video signal receiver
20‧‧‧縮放引擎20‧‧‧Zoom engine
30、31‧‧‧色彩引擎30, 31‧‧‧Color Engine
40‧‧‧輸出級40‧‧‧Output level
50‧‧‧面板50‧‧‧ panel
60‧‧‧快閃記憶體60‧‧‧Flash memory
70‧‧‧微控制器70‧‧‧Microcontroller
101‧‧‧局部調整單元101‧‧‧Local adjustment unit
201‧‧‧畫面201‧‧‧ screen
401‧‧‧色調統計單元401‧‧‧tone statistical unit
402‧‧‧預定義色彩管理表402‧‧‧Predefined color management table
403‧‧‧全域色調單元403‧‧‧Global tonal unit
404‧‧‧全域飽和度單元404‧‧‧Global saturation unit
405‧‧‧全域亮度單元405‧‧‧Global brightness unit
406‧‧‧亮度統計單元406‧‧‧Brightness statistics unit
407‧‧‧亮度迦瑪曲線單元407‧‧‧Brightness gamma curve unit
F101~F113‧‧‧色彩分佈圖F101~F113‧‧‧Color distribution map
P1~P9‧‧‧畫素P1~P9‧‧‧ pixels
A1~A10‧‧‧區域A1~A10‧‧‧Area
S101~S102‧‧‧依照本發明之實施例所繪示之色彩調整方法流程圖之各步驟S101~S102‧‧‧ steps of the flow chart of the color adjustment method according to the embodiment of the invention
圖1是依照本發明之第一實施例之一種顯示裝置之架構圖。1 is a block diagram of a display device in accordance with a first embodiment of the present invention.
圖2-1是依照本發明之第一實施例之一張畫面之各畫素之色調、色彩飽和度(Color Saturation，簡稱飽和度)之示意圖。Figure 2-1 is a diagram showing the hue and color saturation (color saturation) of each pixel of a picture according to the first embodiment of the present invention.
圖2-2是依照本發明之第一實施例之調整落於區域A1之畫素之色調之示意圖。2-2 is a diagram showing the adjustment of the hue of the pixels falling in the area A1 in accordance with the first embodiment of the present invention.
圖2-3是依照本發明之第一實施例之調整落於區域A1之畫素之飽和度之示意圖。2-3 is a diagram showing the adjustment of the saturation of pixels falling in the area A1 in accordance with the first embodiment of the present invention.
圖2-4是依照本發明之第一實施例之調整落於區域A1之畫素之亮度之示意圖。2-4 are diagrams showing the adjustment of the brightness of a pixel falling in the area A1 in accordance with the first embodiment of the present invention.
圖2-5是依照本發明之第二實施例之調整落於區域A2之畫素之色調之示意圖。2-5 are schematic views showing the adjustment of the hue of pixels falling in the area A2 in accordance with the second embodiment of the present invention.
圖2-6是依照本發明之第二實施例之調整落於區域A2之畫素之飽和度之示意圖。2-6 are schematic views showing the adjustment of the saturation of pixels falling in the area A2 in accordance with the second embodiment of the present invention.
圖2-7是依照本發明之第二實施例之調整落於區域A2之畫素之亮度之示意圖。2-7 are schematic views showing the adjustment of the brightness of pixels falling in the area A2 in accordance with the second embodiment of the present invention.
圖3是依照本發明之第三實施例之一種顯示裝置之架構圖。3 is a block diagram of a display device in accordance with a third embodiment of the present invention.
圖4是依照本發明之第四實施例之一種色彩引擎之架構圖。4 is a block diagram of a color engine in accordance with a fourth embodiment of the present invention.
圖5-1是依照本發明之第四實施例之一種色調統計之示意圖。5-1 is a diagram showing a color gradation according to a fourth embodiment of the present invention.
圖5-2是依照本發明之第四實施例之一種調整全域色調之示意圖。Figure 5-2 is a schematic illustration of adjusting the global tones in accordance with a fourth embodiment of the present invention.
圖5-3是依照本發明之第四實施例之一種調整全域飽和度之示意圖。Figure 5-3 is a schematic diagram of adjusting global saturation in accordance with a fourth embodiment of the present invention.
圖5-4是依照本發明之第四實施例之一種調整全域亮度之示意圖。Figure 5-4 is a diagram showing the adjustment of the global brightness according to the fourth embodiment of the present invention.
圖5-5是依照本發明之第四實施例之一種亮度統計之示意圖。5-5 are schematic diagrams of luminance statistics in accordance with a fourth embodiment of the present invention.
圖6是依照本發明之第四實施例之一種亮度迦瑪曲線之示意圖。Figure 6 is a schematic illustration of a luminance gamma curve in accordance with a fourth embodiment of the present invention.
圖7是依照本發明之第五實施例之一種顯示裝置之架構圖。Figure 7 is a block diagram of a display device in accordance with a fifth embodiment of the present invention.
圖8是依照本發明之第六實施例之一種顯示裝置之架構圖。Figure 8 is a block diagram of a display device in accordance with a sixth embodiment of the present invention.
圖9是依照本發明之第七實施例之一種色彩引擎之架構圖。9 is a block diagram of a color engine in accordance with a seventh embodiment of the present invention.
圖10-1是依照本發明之第八實施例之一種顯示裝置之色彩調整方法流程圖。10-1 is a flow chart of a color adjustment method of a display device in accordance with an eighth embodiment of the present invention.
圖10-2是依照本發明之圖10-1所繪示之一種色彩調整示意圖。Figure 10-2 is a color adjustment diagram of Figure 10-1 in accordance with the present invention.
圖10-3是依照本發明之圖10-1所繪示之另一種色彩調整示意圖。Figure 10-3 is a schematic diagram of another color adjustment illustrated in Figure 10-1 in accordance with the present invention.
圖1是依照本發明之第一實施例之一種顯示裝置之架構圖，請參照圖1。顯示裝置包括視訊訊號接收器10、縮放引擎(Scaling Engine)20、色彩引擎(Color Engine)30、輸出級(Output Stage)40與面板(Panel)50。其中視訊訊號接收器10用以接收視訊訊號，本實施例中，視訊訊號接收器10以類比數位轉換器(Analog Digital Converter，簡稱ADC)為例。類比數位轉換器用以將類比之視訊訊號轉換成數位之視訊訊號。在其他實施例中，視訊訊號接收器10也可以是數位視訊介面(Digital Visual Interface，DVI)用以接收數位之視訊訊號，並且輸出數位訊號。縮 放引擎20耦接於視訊訊號接收器10，用以接收數位之視訊訊號並調整視訊訊號之解析度，例如將1280×1024解析度之視訊訊號轉換成1024×768解析度之視訊訊號。而本領域具有通常知識者可依其需求，將視訊訊號之解析度轉換成其所需之解析度，在此則不予贅述。1 is a block diagram of a display device in accordance with a first embodiment of the present invention. Please refer to FIG. The display device includes a video signal receiver 10, a Scaling Engine 20, a Color Engine 30, an Output Stage 40, and a Panel 50. The video signal receiver 10 is configured to receive a video signal. In this embodiment, the video signal receiver 10 is exemplified by an analog digital converter (ADC). An analog digital converter is used to convert an analog video signal into a digital video signal. In other embodiments, the video signal receiver 10 can also be a digital video interface (DVI) for receiving digital video signals and outputting digital signals. Shrink The display engine 20 is coupled to the video signal receiver 10 for receiving digital video signals and adjusting the resolution of the video signals. For example, the video signal of 1280×1024 resolution is converted into a video signal of 1024×768 resolution. Those with ordinary knowledge in the field can convert the resolution of the video signal into the required resolution according to their needs, and will not be described here.
承上述，色彩引擎30耦接於縮放引擎20並接收視訊訊號。值得注意的是，色彩引擎30包括了局部調整單元101。局部調整單元101用以針對視訊訊號之一畫面中具有特定範圍之色調之第一畫素群，調整第一畫素群之色調、飽和度或亮度。輸出級40耦接於色彩引擎30，用以增加視訊訊號之驅動能力，並且輸出視訊訊號。面板50耦接於輸出級40，用以呈現調整後之視訊訊號。皆下來則針對色彩引擎30如何調整視訊資料作更詳細之說明。In the above, the color engine 30 is coupled to the scaling engine 20 and receives the video signal. It is worth noting that the color engine 30 includes a local adjustment unit 101. The local adjustment unit 101 is configured to adjust the hue, saturation or brightness of the first pixel group for the first pixel group having a specific range of tones in one of the video signals. The output stage 40 is coupled to the color engine 30 for increasing the driving capability of the video signal and outputting the video signal. The panel 50 is coupled to the output stage 40 for presenting the adjusted video signal. All of them are explained in more detail on how the color engine 30 adjusts the video data.
圖2-1是依照本發明之第一實施例之一張畫面之各畫素之色調、色彩飽和度(Color Saturation，簡稱飽和度)之示意圖，請參照圖2-1。假設畫面201為視訊訊號之一張畫面。在此實施例，畫面201之解析度特別以3×3之解析度作為例子來說明本實施例。本領域具有通常知識者應當知道，本實施例所舉例的「3×3之解析度」僅是一特定實施例，在另一實施例中，畫面201仍可以是各種不同之解析度，故本發明不應當限定於此種特定實施例。2-1 is a schematic diagram showing the hue and color saturation (color saturation) of each pixel of a picture according to the first embodiment of the present invention. Please refer to FIG. 2-1. It is assumed that the picture 201 is a picture of the video signal. In this embodiment, the resolution of the screen 201 is explained by taking the resolution of 3 × 3 as an example to explain the present embodiment. It should be understood by those skilled in the art that the "3 x 3 resolution" exemplified in this embodiment is only a specific embodiment. In another embodiment, the screen 201 can still have various resolutions. The invention should not be limited to this particular embodiment.
畫面201包括了畫素P1~P9，其中畫素P1~P9各自有其色調、飽和度與亮度。為了易於進行實施例之說明，在此假設畫素P1~P9之亮度分別為亮度1~亮度9，而畫素P1~P9之色調 與飽和度則以色彩分佈圖F101表示之。在色彩分佈圖F101，畫素之色調以角度表示之，假設紅色、綠色與藍色分別為角度0°、120°與240°，而0°~120°之顏色可用紅色與綠色混色得之，120°~240°之顏色可用綠色與藍色混色得之，240°~360°之顏色可用藍色與紅色混色得之，其中360°與0°皆代表紅色。色彩分佈圖F101中，畫素之飽和度以距離圓心之遠近來表示之，也就是說畫素若落於圓心位置則畫素之飽和度為0，愈遠離圓心位置，飽和度則愈大。The picture 201 includes pixels P1 to P9, wherein the pixels P1 to P9 each have their hue, saturation and brightness. In order to facilitate the description of the embodiment, it is assumed here that the luminances of the pixels P1 to P9 are respectively brightness 1 to brightness 9, and the color of the pixels P1 to P9 The saturation is represented by the color distribution map F101. In the color distribution map F101, the hue of the pixels is expressed by angle, assuming that red, green, and blue are angles of 0°, 120°, and 240°, respectively, and colors of 0° to 120° can be mixed with red and green. The color of 120 ° ~ 240 ° can be mixed with green and blue, 240 ° ~ 360 ° color can be mixed with blue and red, 360 ° and 0 ° are red. In the color distribution map F101, the saturation of the pixel is expressed by the distance from the center of the circle. That is to say, if the pixel falls at the center of the circle, the saturation of the pixel is 0. The farther away from the center of the circle, the greater the saturation.
承上述，局部調整單元101用以針對視訊訊號之一畫面中具有特定範圍之色調之第一畫素群，調整第一畫素群之色調、飽和度或亮度。假設第一畫素群為落於區域A1之畫素群，也就是說色彩引擎30之局部調整單元101針對畫面201具有色調0°~30°之畫素(即畫素P1~P3)，進行色調、飽和度或亮度之調整。In the above, the local adjustment unit 101 is configured to adjust the hue, saturation or brightness of the first pixel group for the first pixel group having a specific range of tones in one of the video signals. It is assumed that the first pixel group is a pixel group that falls in the area A1, that is, the local adjustment unit 101 of the color engine 30 has pixels (ie, pixels P1 to P3) having a hue of 0° to 30° for the picture 201. Adjustment of hue, saturation or brightness.
例如色彩引擎30可依據HSI色彩空間中畫素的色調(或飽和度、或亮度)將視訊訊號的畫面的多個畫素分割為多個畫素群，其中H代表色調，S代表飽和度，I代表亮度，並在不改變HSI色彩空間之複數條色軸之條件下，藉由將多個畫素群中特定畫素群的畫素於HSI色彩空間中所佔據之一區域移動至另一區域來調整具有在一預設範圍內的色調(或飽和度、或亮度)的畫素群中的特定畫素群的色調(或飽和度、或亮度)，以局部地調整在HSI色彩空間中特定畫素群之畫素的色調(或飽和度、或亮度)而不移動畫面在HSI色彩空間中除了特定畫素群以外的任何其它畫素群，其中上述之預設範圍為全域色調(或飽和度、或亮度)的一部分。以 下將更進一步列舉數個實施例說明色調、飽和度以及亮度之調整應用情形。For example, the color engine 30 may divide a plurality of pixels of the picture of the video signal into a plurality of pixel groups according to the hue (or saturation, or brightness) of the pixels in the HSI color space, where H represents a hue and S represents a saturation. I represents brightness and moves one of the regions of the pixel group of the plurality of pixel groups in the HSI color space to another region without changing the plurality of color axes of the HSI color space. A region to adjust the hue (or saturation, or brightness) of a particular pixel group in a pixel group having a hue (or saturation, or brightness) within a predetermined range to locally adjust in the HSI color space The hue (or saturation, or brightness) of the pixels of a particular pixel group without moving the picture in any other pixel group other than the specific pixel group in the HSI color space, where the above preset range is the global tone (or Part of saturation, or brightness). Take Further, several embodiments will be described to illustrate the application of adjustment of hue, saturation, and brightness.
圖2-2是依照本發明之第一實施例之調整落於區域A1之畫素之色調之示意圖，請參考圖2-2。先以局部調整單元101調整落於區域A1之畫素之色調為例。局部調整單元101對畫素P1~P3之色調減少30°，則畫素P1~P3之色調與飽和度則由色彩分佈圖F101轉變為色彩分佈圖F102。畫素P1~P3之飽和度與亮度皆維持不變，僅色調由偏紅色轉變為偏向紫紅色。而且畫素P4~P9之色調、飽和度與亮度皆維持不變。此作法好處在於針對具有特定範圍之色調之第一畫素群，局部調整單元101調整了第一畫素群之色調，並且保持了其他畫素之色調、飽和度與亮度。另外，值得一提的是以圖2-2之方式調整畫素之色調，若調整的角度太大容易使畫面之顏色不連續。因此，若要對具有特定範圍之色調之畫素群進行色調調整，則以小角度之調整方式為佳。2-2 is a schematic diagram of adjusting the hue of a pixel falling in the area A1 according to the first embodiment of the present invention, please refer to FIG. 2-2. First, the local adjustment unit 101 adjusts the color tone of the pixel falling in the area A1 as an example. The local adjustment unit 101 reduces the hue of the pixels P1 to P3 by 30°, and the hue and saturation of the pixels P1 to P3 are converted from the color distribution map F101 to the color distribution map F102. The saturation and brightness of the pixels P1~P3 remain unchanged, and only the hue changes from reddish to purpleish. Moreover, the hue, saturation and brightness of the pixels P4~P9 remain unchanged. The advantage of this approach is that for a first pixel group having a particular range of tones, the local adjustment unit 101 adjusts the hue of the first pixel group and maintains the hue, saturation and brightness of the other pixels. In addition, it is worth mentioning that the color of the pixels is adjusted in the manner of Figure 2-2. If the angle of adjustment is too large, the color of the picture is not continuous. Therefore, in order to adjust the color tone of a pixel group having a specific range of color tones, it is preferable to adjust the small angle.
圖2-3是依照本發明之第一實施例之調整落於區域A1之畫素之飽和度之示意圖，請參考圖2-3。再以局部調整單元101調整落於區域A1之畫素之飽和度為例。局部調整單元101增加畫素P1~P3之飽和度，則畫素P1~P3之色調與飽和度則由色彩分佈圖F101轉變為色彩分佈圖F103。畫素P1~P3之色調與亮度皆維持不變，僅飽和度變大而已。而且畫素P4~P9之色調、飽和度與亮度皆維持不變。此作法好處在於針對具有特定範圍之色調之第一畫素群，局部調整單元101調整了第一畫素群之飽和度，並且 保持了其他畫素之色調、飽和度與亮度。2-3 is a schematic diagram of adjusting the saturation of pixels falling in the area A1 according to the first embodiment of the present invention, please refer to FIG. 2-3. The local adjustment unit 101 adjusts the saturation of the pixels falling in the area A1 as an example. The local adjustment unit 101 increases the saturation of the pixels P1 to P3, and the hue and saturation of the pixels P1 to P3 are converted from the color distribution map F101 to the color distribution map F103. The hue and brightness of the pixels P1 to P3 remain unchanged, and only the saturation becomes large. Moreover, the hue, saturation and brightness of the pixels P4~P9 remain unchanged. The advantage of this approach is that the local adjustment unit 101 adjusts the saturation of the first pixel group for the first pixel group having a specific range of tones, and Maintains the hue, saturation, and brightness of other pixels.
圖2-4是依照本發明之第一實施例之調整落於區域A1之畫素之亮度之示意圖，請參考圖2-4。再以局部調整單元101調整落於區域A1之畫素之亮度為例。局部調整單元101對畫素P1~P3之亮度增加5，則畫素P1~P3之亮度則分別由亮度1、2、3轉變為亮度6、7、8。畫素P1~P3之色調與飽和度皆維持不變(即由色彩分佈圖F101轉變為色彩分佈圖F104，其中色彩分佈圖F101與色彩分佈圖F104相同)，僅亮度發生改變而已。而且畫素P4~P9之色調、飽和度與亮度皆維持不變。此作法好處在於針對具有特定範圍之色調之第一畫素群，局部調整單元101調整了第一畫素群之亮度，並且保持了其他畫素之色調、飽和度與亮度。2-4 are schematic diagrams showing the adjustment of the brightness of pixels falling in the area A1 in accordance with the first embodiment of the present invention, please refer to Figs. 2-4. The local adjustment unit 101 adjusts the brightness of the pixels falling in the area A1 as an example. The local adjustment unit 101 increases the luminance of the pixels P1 to P3 by 5, and the luminances of the pixels P1 to P3 are converted from the luminances 1, 2, and 3 to the luminances 6, 7, and 8, respectively. The hue and saturation of the pixels P1 to P3 remain unchanged (i.e., from the color distribution map F101 to the color distribution map F104, wherein the color distribution map F101 is the same as the color distribution map F104), only the brightness changes. Moreover, the hue, saturation and brightness of the pixels P4~P9 remain unchanged. The advantage of this approach is that for a first pixel group having a particular range of tones, the local adjustment unit 101 adjusts the brightness of the first pixel group and maintains the hue, saturation and brightness of the other pixels.
本技術領域具有通常知識者也可視其需求，而依據本發明之精神與前述諸實施例之教示改變實施方式。例如，色彩引擎30之局部調整單元101針對視訊訊號之畫面中具有特定範圍之色調且具有特定範圍之飽和度之第二畫素群，調整第二畫素群之色調、飽和度或亮度。假設第二畫素群為落於區域A2之畫素群，也就是說色彩引擎30之局部調整單元101針對畫面201落於區域A2之畫素(即畫素P2、P3)，進行色調、飽和度或亮度之調整。Those skilled in the art can also adapt their embodiments to the needs thereof, and the embodiments are modified in accordance with the spirit of the present invention and the teachings of the foregoing embodiments. For example, the local adjustment unit 101 of the color engine 30 adjusts the hue, saturation, or brightness of the second pixel group for the second pixel group having a specific range of hue and having a certain range of saturation in the picture of the video signal. It is assumed that the second pixel group is a pixel group that falls in the area A2, that is, the local adjustment unit 101 of the color engine 30 performs hue and saturation for the pixels of the picture 201 falling in the area A2 (ie, pixels P2 and P3). Degree or brightness adjustment.
圖2-5是依照本發明之第二實施例之調整落於區域A2之畫素之色調之示意圖，請參考圖2-5。先以局部調整單元101調整落於區域A2之畫素之色調為例，亦即在本實施例中，上述之特定畫素群更被限制為在色彩飽和度的一預設範圍內，此預設範圍為 全域色彩飽和度的一部分。局部調整單元101對畫素P2、P3之色調減少90°，則畫素P2、P3之色調與飽和度則由色彩分佈圖F101轉變為色彩分佈圖F105。畫素P2、P3之飽和度與亮度皆維持不變，僅色調由偏紅色轉變為偏向紫紅色。而且畫素P4~P9之色調、飽和度與亮度皆維持不變。此作法好處在於針對具有特定範圍之色調與特定範圍之飽和度之第二畫素群，局部調整單元101調整了第二畫素群之色調，並且保持了其他畫素之色調、飽和度與亮度。2-5 are schematic views showing the adjustment of the hue of pixels falling in the area A2 in accordance with the second embodiment of the present invention, please refer to Figs. 2-5. For example, in the embodiment, the specific pixel group is further limited to a preset range of color saturation, and the pre-adjustment unit 101 adjusts the color of the pixel falling in the area A2. Set the range to Part of the global color saturation. The local adjustment unit 101 reduces the hue of the pixels P2 and P3 by 90°, and then the hue and saturation of the pixels P2 and P3 are converted from the color distribution map F101 to the color distribution map F105. The saturation and brightness of the pixels P2 and P3 remain unchanged, and only the hue changes from reddish to purple. Moreover, the hue, saturation and brightness of the pixels P4~P9 remain unchanged. The advantage of this approach is that for a second pixel group having a specific range of tones and a certain range of saturation, the local adjustment unit 101 adjusts the hue of the second pixel group and maintains the hue, saturation and brightness of other pixels. .
圖2-6是依照本發明之第二實施例之調整落於區域A2之畫素之飽和度之示意圖，請參考圖2-6。再以局部調整單元101調整落於區域A2之畫素之飽和度為例。局部調整單元101增加畫素P2、P3之飽和度，則畫素P2、P3之色調與飽和度則由色彩分佈圖F101轉變為色彩分佈圖F106。畫素P2、P3之色調與亮度皆維持不變，僅飽和度變大而已。而且畫素P4~P9之色調、飽和度與亮度皆維持不變。此作法好處在於針對具有特定範圍之色調與特定範圍之飽和度之第二畫素群，局部調整單元101調整了第二畫素群之飽和度，並且保持了其他畫素之色調、飽和度與亮度。2-6 are schematic diagrams showing the adjustment of the saturation of pixels falling in the area A2 according to the second embodiment of the present invention, please refer to FIG. 2-6. The local adjustment unit 101 adjusts the saturation of the pixels falling in the area A2 as an example. The local adjustment unit 101 increases the saturation of the pixels P2 and P3, and the hue and saturation of the pixels P2 and P3 are converted from the color distribution map F101 to the color distribution map F106. The hue and brightness of the pixels P2 and P3 remain unchanged, and only the saturation becomes large. Moreover, the hue, saturation and brightness of the pixels P4~P9 remain unchanged. The advantage of this approach is that for a second pixel group having a specific range of tones and a certain range of saturation, the local adjustment unit 101 adjusts the saturation of the second pixel group and maintains the hue, saturation, and saturation of other pixels. brightness.
圖2-7是依照本發明之第二實施例之調整落於區域A2之畫素之亮度之示意圖，請參考圖2-7。再以局部調整單元101調整落於區域A2之畫素之亮度為例。局部調整單元101對畫素P2、P3之亮度增加5，則畫素P2、P3之亮度則分別由亮度2、3轉變為亮度7、8。畫素P2、P3之色調與飽和度皆維持不變(即由色 彩分佈圖F101轉變為色彩分佈圖F107，其中色彩分佈圖F101與色彩分佈圖F107相同)，僅亮度發生改變而已。而且畫素P4~P9之色調、飽和度與亮度皆維持不變。此作法好處在於針對具有特定範圍之色調與特定範圍之飽和度之第二畫素群，局部調整單元101調整了第二畫素群之亮度，並且保持了其他畫素之色調、飽和度與亮度。2-7 are schematic diagrams showing the adjustment of the brightness of pixels falling in the area A2 according to the second embodiment of the present invention, please refer to FIG. 2-7. The local adjustment unit 101 adjusts the brightness of the pixels falling in the area A2 as an example. The local adjustment unit 101 increases the luminance of the pixels P2 and P3 by 5, and the luminances of the pixels P2 and P3 are converted from the luminances 2 and 3 to the luminances 7 and 8, respectively. The hue and saturation of pixels P2 and P3 remain unchanged (ie, color The color distribution map F101 is converted into a color distribution map F107 in which the color distribution map F101 is the same as the color distribution map F107, and only the brightness is changed. Moreover, the hue, saturation and brightness of the pixels P4~P9 remain unchanged. The advantage of this approach is that for a second pixel group having a specific range of tones and a certain range of saturation, the local adjustment unit 101 adjusts the brightness of the second pixel group and maintains the hue, saturation and brightness of other pixels. .
本技術領域具有通常知識者也可視其需求，而依據本發明之精神與前述諸實施例之教示改變顯示裝置之架構。例如，圖3是依照本發明之第三實施例之一種顯示裝置之架構圖，請參照圖3。於本實施例中，顯示裝置包括了視訊訊號接收器10、縮放引擎20、色彩引擎30、輸出級40、面板50、快閃記憶體(Flash Memory)60與微控制器(Micro Controller，簡稱MCU)70。其中，視訊訊號接收器10、縮放引擎20、色彩引擎30、輸出級40、面板50與上述之實施例相同，在此不再贅述。值得注意的是快閃記憶體60與微控制器70。微控制器70負責顯示裝置之各項運算與控制。快閃記憶體60耦接於該色彩引擎30。快閃記憶體60可預先儲存色彩調整程式碼。因此，色彩引擎30則可依據快閃記憶體60所儲存之色彩調整程式碼調整所接收之視訊訊號之色調、飽和度或亮度。Those skilled in the art can also adapt the needs of the present invention to the architecture of the display device in accordance with the teachings of the present invention and the teachings of the foregoing embodiments. For example, FIG. 3 is a block diagram of a display device in accordance with a third embodiment of the present invention. Please refer to FIG. 3. In this embodiment, the display device includes a video signal receiver 10, a zoom engine 20, a color engine 30, an output stage 40, a panel 50, a flash memory 60, and a microcontroller (Micro Controller, MCU for short). ) 70. The video signal receiver 10, the zoom engine 20, the color engine 30, the output stage 40, and the panel 50 are the same as those in the above embodiments, and are not described herein again. Of note is flash memory 60 and microcontroller 70. The microcontroller 70 is responsible for the various operations and controls of the display device. The flash memory 60 is coupled to the color engine 30. The flash memory 60 can store the color adjustment code in advance. Therefore, the color engine 30 can adjust the hue, saturation or brightness of the received video signal according to the color adjustment code stored in the flash memory 60.
本技術領域具有通常知識者也可視其需求，而依據本發明之精神與前述諸實施例之教示在色彩引擎30中加入色調統計單元(Hue Histogram Unit)、預定義色彩管理表(Pre-define Color Management Table)、全域色調單元(Global Hue Unit)、全域飽和度單元(Global Saturation Unit)、全域亮度單元(Global Intensity Unit)、亮度統計單元(Luminance Histogram Unit)或亮度迦瑪曲線單元(Luminance Gamma Curve Unit)，並適當調整相互間之耦接關係。例如，圖4是依照本發明之第四實施例之一種色彩引擎之架構圖，請參照圖4。色彩引擎30包括了局部調整單元101、色調統計單元401、預定義色彩管理表402、全域色調單元403、全域飽和度單元404、全域亮度單元405、亮度統計單元406與亮度迦瑪曲線單元407。其中局部調整單元101與上述實施例相同，在此不予贅述。Those skilled in the art can also view their needs, and in accordance with the spirit of the present invention and the teachings of the foregoing embodiments, a Hue Histogram Unit, a Pre-define Color, is added to the color engine 30. Management Table), Global Hue Unit, Global Saturation Unit, Global Intensity Unit, Luminance Histogram Unit, or Luminance Gamma Curve Unit), and adjust the coupling relationship with each other as appropriate. For example, FIG. 4 is a block diagram of a color engine according to a fourth embodiment of the present invention. Please refer to FIG. 4. The color engine 30 includes a local adjustment unit 101, a tone statistic unit 401, a predefined color management table 402, a global tone unit 403, a global saturation unit 404, a global luminance unit 405, a luminance statistics unit 406, and a luminance gamma curve unit 407. The local adjustment unit 101 is the same as the above embodiment, and details are not described herein.
承上述，色調統計單元401用以統計畫面之各個畫素群之畫素數量，其中各個畫素群分別具有特定範圍之色調。圖5-1是依照本發明之第四實施例之一種色調統計之示意圖，請參照圖5-1。在本實施例中，以30°之色調作為色調區域間之劃分，於其他實施例中可依其需求以不同角度之色調作為色調區域間之劃分。色彩分佈圖F101經過色調統計後則變為色彩分佈圖F108。色彩分佈圖F108中，色調0°~30°之畫素數量總共為3個，並且標示於色調0°~30°之圓周外。以此類推，色調30°~60°、60°~90°、90°~120°、120°~150°、150°~180°、180°~210°、210°~240°、240°~270°、270°~300°、300°~330°、330°~360°之畫素數量分別為1、0、1、0、0、1、1、1、0、1、0。此作法的好處在於，利用色調統計單元401可以知道畫面中各畫素之色調分佈情況。也就 是說，藉由色調統計單元401可以推知畫面是何種畫面，例如統計之畫素數量大多為藍色、則畫面可能是天空。又例如統計之畫素數量大多為膚色、則畫面可能是人像。In the above, the tone statistic unit 401 is configured to count the number of pixels of each pixel group of the picture, wherein each pixel group has a color of a specific range. 5-1 is a schematic diagram of a color gradation according to a fourth embodiment of the present invention. Please refer to FIG. 5-1. In the present embodiment, the color tone of 30° is used as the division between the hue regions. In other embodiments, the hue of different angles can be used as the division between the hue regions. The color distribution map F101 becomes a color distribution map F108 after the color tone statistics. In the color distribution map F108, the number of pixels with a hue of 0° to 30° is three in total, and is indicated outside the circumference of the hue of 0° to 30°. And so on, the color tone 30 ° ~ 60 °, 60 ° ~ 90 °, 90 ° ~ 120 °, 120 ° ~ 150 °, 150 ° ~ 180 °, 180 ° ~ 210 °, 210 ° ~ 240 °, 240 ° ~ The number of pixels of 270°, 270°~300°, 300°~330°, and 330°~360° are 1, 0, 1, 0, 0, 1, 1, 1, 0, 1, and 0, respectively. This method has the advantage that the tone distribution unit 401 can be used to know the tone distribution of each pixel in the picture. Also That is to say, the hue statistics unit 401 can infer what kind of picture the picture is. For example, if the number of statistical pixels is mostly blue, the picture may be sky. For example, if the number of pixels in the statistics is mostly skin color, the picture may be a portrait.
承上述，預定義色彩管理表402則依據色調統計單元401統計出之各個畫素群之畫素數量決定一色彩管理表，色彩引擎30則依據色彩管理表調整視訊訊號。例如由統計之畫素數量知道畫面可能是天空，預定義色彩管理表402則產生對各畫素進行藍色補強之色彩管理表，使藍天可以更藍。例如由統計之畫素數量知道畫面可能是人像，預定義色彩管理表402則產生對各畫素進行膚色之亮度補強之色彩管理表，使人像之皮膚顏色更加白晰。In the above, the predefined color management table 402 determines a color management table according to the number of pixels of each pixel group counted by the color statistic unit 401, and the color engine 30 adjusts the video signal according to the color management table. For example, it is known by the number of statistical pixels that the picture may be the sky, and the predefined color management table 402 generates a color management table for blue enhancement of each pixel, so that the blue sky can be bluer. For example, it is known by the number of statistical pixels that the picture may be a portrait, and the predefined color management table 402 generates a color management table for color enhancement of the color of each pixel, so that the skin color of the portrait is more white.
全域色調單元403用以調整整體畫面之各畫素之色調。圖5-2是依照本發明之第四實施例之一種調整全域色調之示意圖，請參照圖5-2。在本實施例中，以全域色調單元403對各個畫素之色調增加30°之色調為例進行說明之，於其他實施例中也可依其需求增加或減少各種不同之色調角度。色彩分佈圖F101之各畫素經全域色調單元403調整後則變為色彩分佈圖F109。此作法的好處在於可以對整體畫面一併調整各畫素之色調，並且維持各個畫素之飽和度與亮度，大幅減少運算複雜度。The global tone unit 403 is used to adjust the hue of each pixel of the overall picture. FIG. 5-2 is a schematic diagram of adjusting the global tone according to the fourth embodiment of the present invention, please refer to FIG. 5-2. In the present embodiment, the color tone of each pixel is increased by 30° by the global tone unit 403. In other embodiments, various color angles may be increased or decreased according to requirements. Each of the pixels of the color distribution map F101 is adjusted by the global tone unit 403 to become the color distribution map F109. The advantage of this method is that the color of each pixel can be adjusted together with the overall picture, and the saturation and brightness of each pixel are maintained, which greatly reduces the computational complexity.
全域飽和度單元404用以調整整體畫面之各畫素之飽和度。圖5-3是依照本發明之第四實施例之一種調整全域飽和度之示意圖，請參照圖5-3。在本實施例中，以全域飽和度單元404增加各個畫素之飽和度為例進行說明之，於其他實施例中也可依其 需求增加或減少不同程度之飽和度。色彩分佈圖F101之各畫素經全域飽和度單元404調整後則變為色彩分佈圖F110。此作法的好處在於可以對整體畫面一併調整各畫素之飽和度，並且維持各個畫素之色調與亮度，大幅減少運算複雜度。The global saturation unit 404 is used to adjust the saturation of each pixel of the overall picture. FIG. 5-3 is a schematic diagram of adjusting global saturation according to a fourth embodiment of the present invention, please refer to FIG. 5-3. In this embodiment, the saturation of each pixel is increased by the global saturation unit 404 as an example, and in other embodiments, Demand increases or decreases to varying degrees of saturation. The pixels of the color distribution map F101 are adjusted by the global saturation unit 404 to become the color distribution map F110. The advantage of this method is that the saturation of each pixel can be adjusted together with the overall picture, and the hue and brightness of each pixel are maintained, which greatly reduces the computational complexity.
全域亮度單元405、用以調整整體畫面之各畫素之亮度。圖5-4是依照本發明之第四實施例之一種調整全域亮度之示意圖，請參照圖5-4。在本實施例中，以全域亮度單元405增加各個畫素之亮度值3為例進行說明之，於其他實施例中也可依其需求增加或減少不同程度之亮度。假設圖2B之畫素P1~P9之亮度分別為亮度1~9。色彩分佈圖F101之畫素P1~P9經全域亮度單元405調整後畫素P1~P9之亮度則分別變為亮度4~12，並且畫素P1~P9之色調與飽和度維持不變(如色彩分佈圖F111)。此作法的好處在於可以對整體畫面一併調整各畫素之亮度，並且維持各個畫素之色調與飽和度，大幅減少運算複雜度。The global luminance unit 405 is configured to adjust the brightness of each pixel of the overall picture. FIG. 5-4 is a schematic diagram of adjusting the global brightness according to the fourth embodiment of the present invention. Please refer to FIG. 5-4. In the present embodiment, the luminance value 3 of each pixel is increased by the global luminance unit 405 as an example. In other embodiments, different degrees of luminance may be increased or decreased according to requirements. It is assumed that the luminances of the pixels P1 to P9 of FIG. 2B are respectively luminances 1 to 9. The pixels P1 to P9 of the color distribution map F101 are adjusted by the global luminance unit 405, and the luminances of the pixels P1 to P9 are respectively changed to brightness 4 to 12, and the hue and saturation of the pixels P1 to P9 remain unchanged (such as color). Distribution map F111). The advantage of this method is that the brightness of each pixel can be adjusted together with the overall picture, and the hue and saturation of each pixel are maintained, which greatly reduces the computational complexity.
亮度統計單元406，用以統計畫面之各個畫素群之畫素數量，其中各個畫素群分別具有特定範圍之亮度。圖5-5是依照本發明之第四實施例之一種亮度統計之示意圖，請參照圖5-5。在本實施例中，以亮度統計單元406依亮度統計色彩分佈圖F101之各畫素(畫素P1~P9)之畫素數量為例，假設畫素P1~P9之亮度分別為亮度1~9，則色彩分佈圖F101經過亮度統計後則變為圖5-5。圖5-5中，亮度1~亮度9之畫素數量分別有1個。此作法的好處在於，利用亮度統計單元406可以知道畫面中各畫素之亮 度分佈情況。也就是說，藉由亮度統計單元406可以推知畫面是偏亮畫面或是偏暗畫面，例如畫面是偏亮畫面、則可將畫面調暗。又例如畫面是偏暗畫面、則可將畫面調亮。The brightness statistics unit 406 is configured to count the number of pixels of each pixel group of the picture, wherein each pixel group has a specific range of brightness. 5-5 are schematic diagrams showing luminance statistics according to a fourth embodiment of the present invention. Please refer to FIG. 5-5. In the present embodiment, the luminance statistics unit 406 counts the number of pixels of each pixel (pixels P1 to P9) of the color distribution map F101 according to the brightness, and assumes that the luminances of the pixels P1 to P9 are respectively brightness 1 to 9. Then, the color distribution map F101 becomes the figure 5-5 after the brightness statistics. In Figure 5-5, the number of pixels with brightness 1 to brightness 9 is one. The advantage of this method is that the luminance statistics unit 406 can know the brightness of each pixel in the picture. Degree distribution. That is to say, the brightness statistics unit 406 can infer that the picture is a bright picture or a dark picture. For example, if the picture is a bright picture, the picture can be dimmed. For example, if the screen is a dark screen, the screen can be brightened.
本技術領域具有通常知識者也可視其需求，而依據畫面中各畫素之亮度分佈情況調整畫面之對比度(Contrast)。例如，圖6是依照本發明之第四實施例之一種亮度迦瑪曲線之示意圖，請參照圖6。亮度迦瑪曲線單元407耦接於該亮度統計單元406。亮度迦瑪曲線單元407依據亮度統計單元406統計之各畫素之亮度分佈情況決定亮度迦瑪曲線。本領域具有通常知識者應當知道圖6中之亮度迦瑪曲線僅是一特定實施例，於其他實施例中，可以其需求決定其適合之亮度迦瑪曲線。而色彩引擎30則依據亮度迦瑪曲線調整視訊訊號。每個畫素之亮度經過亮度迦瑪曲線轉換後會得到新的亮度，藉以提昇畫面之對比度。於另一實施例中，本領域具有通常知識者更可先預設多組之亮度迦瑪曲線，依據亮度統計單元406統計之各畫素之亮度分佈情況，由亮度迦瑪曲線單元407選擇其適合之亮度迦瑪曲線。The knowledge of the person skilled in the art can also adjust the contrast of the picture according to the brightness distribution of each pixel in the picture. For example, FIG. 6 is a schematic diagram of a luminance gamma curve according to a fourth embodiment of the present invention. Please refer to FIG. 6. The luminance gamma curve unit 407 is coupled to the brightness statistics unit 406. The luminance gamma curve unit 407 determines the luminance gamma curve according to the luminance distribution of each pixel counted by the luminance statistical unit 406. Those of ordinary skill in the art will appreciate that the luminance gamma curve of Figure 6 is only a particular embodiment, and in other embodiments, its suitable luminance gamma curve may be determined by its needs. The color engine 30 adjusts the video signal according to the brightness gamma curve. The brightness of each pixel is converted to a new brightness by the luminance gamma curve to enhance the contrast of the picture. In another embodiment, a person having ordinary knowledge in the art can preset a plurality of sets of luminance gamma curves, and the luminance gamma curve unit 407 selects the luminance distribution of each pixel according to the luminance statistical unit 406. Suitable for the brightness of the gamma curve.
本技術領域具有通常知識者也可視其需求，而依據本發明之精神與前述諸實施例之教示改變顯示裝置之架構。例如，圖7是依照本發明之第五實施例之一種顯示裝置之架構圖，請參照圖7。於本實施例中，顯示裝置包括色彩引擎31、輸出級40與面板50。其中色彩引擎31，用以接收視訊訊號。色彩引擎31包括色調統計單元401。色調統計單元41，用以統計視訊訊號之畫面之各 個畫素群之畫素數量，其中各個畫素群分別具有特定範圍之色調，色彩引擎31則依據各個畫素群之畫素數量調整視訊訊號，亦即可依據HSI色彩空間中各畫素群之畫素的統計數量調整視訊訊號。輸出級40耦接於色彩引擎31，用以輸出視訊訊號。面板50耦接於輸出級40，用以呈現調整後之視訊訊號。而色調統計單元401、輸出級40與面板50之功能請參照上述之實施例，在此則不再贅述。Those skilled in the art can also adapt the needs of the present invention to the architecture of the display device in accordance with the teachings of the present invention and the teachings of the foregoing embodiments. For example, FIG. 7 is a block diagram of a display device according to a fifth embodiment of the present invention. Please refer to FIG. 7. In the present embodiment, the display device includes a color engine 31, an output stage 40, and a panel 50. The color engine 31 is configured to receive video signals. The color engine 31 includes a tone statistic unit 401. The tone statistics unit 41 is configured to count the pictures of the video signals The number of pixels in the pixel group, where each pixel group has a specific range of tones, and the color engine 31 adjusts the video signal according to the number of pixels of each pixel group, and can also be based on each pixel group in the HSI color space. The statistical number of pixels is used to adjust the video signal. The output stage 40 is coupled to the color engine 31 for outputting video signals. The panel 50 is coupled to the output stage 40 for presenting the adjusted video signal. For the functions of the color statistic unit 401, the output stage 40, and the panel 50, refer to the above embodiments, and details are not described herein again.
本技術領域具有通常知識者也可視其需求，而依據本發明之精神與前述諸實施例之教示改變顯示裝置之架構。例如，圖8是依照本發明之第六實施例之一種顯示裝置之架構圖，請參照圖8。於本實施例中，顯示裝置包括色彩引擎31、輸出級40、面板50、快閃記憶體60與微控制器70。其中色彩引擎31、輸出級40、面板50、快閃記憶體60與微控制器70之功能請參照上述諸實施例，在此不再贅述。Those skilled in the art can also adapt the needs of the present invention to the architecture of the display device in accordance with the teachings of the present invention and the teachings of the foregoing embodiments. For example, FIG. 8 is a block diagram of a display device according to a sixth embodiment of the present invention. Please refer to FIG. 8. In the embodiment, the display device includes a color engine 31, an output stage 40, a panel 50, a flash memory 60, and a microcontroller 70. For the functions of the color engine 31, the output stage 40, the panel 50, the flash memory 60 and the microcontroller 70, please refer to the above embodiments, and details are not described herein.
本技術領域具有通常知識者也可視其需求，而依據本發明之精神與前述諸實施例之教示在色彩引擎31中加入局部調整單元、預定義色彩管理表、全域色調單元、全域飽和度單元、全域亮度單元、亮度統計單元或亮度迦瑪曲線單元，並適當調整相互間之耦接關係。例如，圖9是依照本發明之第七實施例之一種色彩引擎之架構圖，請參照圖9。色彩引擎31包括了局部調整單元101、色調統計單元401、預定義色彩管理表402、全域色調單元403、全域飽和度單元404、全域亮度單元405、亮度統計單元406 與亮度迦瑪曲線單元407。其中局部調整單元101、色調統計單元401、預定義色彩管理表402、全域色調單元403、全域飽和度單元404、全域亮度單元405、亮度統計單元406與亮度迦瑪曲線單元407可參考上述諸實施例，在此不予贅述。Those skilled in the art can also view their needs, and in accordance with the spirit of the present invention and the teachings of the foregoing embodiments, a local adjustment unit, a predefined color management table, a global tone unit, a global saturation unit, The global luminance unit, the luminance statistical unit, or the luminance gamma curve unit, and the coupling relationship between them is appropriately adjusted. For example, FIG. 9 is a block diagram of a color engine according to a seventh embodiment of the present invention. Please refer to FIG. 9. The color engine 31 includes a local adjustment unit 101, a tone statistic unit 401, a predefined color management table 402, a global tone unit 403, a global saturation unit 404, a global luminance unit 405, and a luminance statistics unit 406. With the luminance gamma curve unit 407. The local adjustment unit 101, the tone statistic unit 401, the predefined color management table 402, the global tone unit 403, the global saturation unit 404, the global luminance unit 405, the luminance statistics unit 406, and the luminance gamma curve unit 407 can refer to the foregoing implementations. For example, it will not be repeated here.
圖10-1是依照本發明之第八實施例之一種顯示裝置之色彩調整方法流程圖，請參照圖10-1。首先執行步驟S101，由上述實施例之色彩引擎將畫面中之多個畫素依其色調與飽和度分到對應之多個色調區域。亦即可依據HSI色彩空間中畫素的色調與飽和度將視訊訊號之畫面的多個畫素分割為多個畫素群，其中H代表色調，S代表飽和度，I代表亮度。接著再執行步驟S102，由色彩引擎藉由將色調區域的多個畫素自HSI色彩空間中所佔據之一區域移動至另一區域而不改變HSI色彩空間之複數條色軸的方式透過一個轉換函數調整多個色調區域其中之一內之該些畫素之分佈位置，其中多個色調區域可個別地被調整而不移動任何其它HSI色彩空間中的色調區域。10-1 is a flow chart of a color adjustment method of a display device according to an eighth embodiment of the present invention. Please refer to FIG. 10-1. First, step S101 is executed. The color engine in the above embodiment divides the plurality of pixels in the picture into corresponding plurality of tonal regions according to their hue and saturation. The plurality of pixels of the picture of the video signal can be divided into a plurality of pixel groups according to the hue and saturation of the pixels in the HSI color space, where H represents a hue, S represents saturation, and I represents brightness. Then, step S102 is further performed, by the color engine, by converting a plurality of pixels of the hue region from one region occupied by the HSI color space to another region without changing the plurality of color axes of the HSI color space. The function adjusts the distribution locations of the pixels within one of the plurality of tonal regions, wherein the plurality of tonal regions are individually adjustable without moving the tonal regions in any other HSI color space.
承上述實施例，例如圖10-2是依照本發明之圖10-1所繪示之一種色彩調整示意圖，請參照圖10-2。畫面201包括了畫素P1~P9。畫面201經過步驟S101之後則變為色彩分佈圖F101。而色彩分佈圖F101經過步驟S102之後則變為色彩分佈圖F112。值得注意的是色彩分佈圖F101中之區域A3與A4經過轉換函數轉換後則變為色彩分佈圖F112中之區域A5與A6。而畫素P1~P4也隨著區域的變化而移到不同之位置。換言之，畫素P1~P4 經過轉換函數轉換後也改變了其色調。此作法的好處在於利用轉換函數轉換各區域之畫素位置可平滑地調整畫素之色調，避免使轉換後之畫面產生畫素產生色調不連續之現象。本領域具有通常知識者也可依其需求，利用內差法來調整畫素之色調，在此不再贅述。The above embodiment, for example, FIG. 10-2 is a color adjustment diagram of FIG. 10-1 according to the present invention. Please refer to FIG. 10-2. The picture 201 includes pixels P1 to P9. The screen 201 is changed to the color distribution map F101 after the step S101. The color distribution map F101 becomes the color distribution map F112 after the step S102. It is to be noted that the regions A3 and A4 in the color distribution map F101 are converted into regions A5 and A6 in the color distribution map F112 after being converted by the conversion function. The pixels P1~P4 also move to different positions as the area changes. In other words, pixels P1~P4 It has also changed its tone after conversion by the conversion function. The advantage of this method is that the conversion function can be used to convert the pixel position of each region to smoothly adjust the color of the pixels, so as to avoid the phenomenon that the pixels in the converted picture produce a discontinuity of the color. Those with ordinary knowledge in the field can also adjust the color of the pixels by using the internal difference method according to their needs, and will not be described here.
承上述實施例，又例如圖10-3是依照本發明之圖10-1所繪示之另一種色彩調整示意圖，請參照圖10-3。畫面201包括了畫素P1~P9。畫面201經過步驟S101之後則變為色彩分佈圖F101。而色彩分佈圖F101經過步驟S102之後則變為色彩分佈圖F113。值得注意的是色彩分佈圖F101中之區域A7與A8經過轉換函數轉換後則變為色彩分佈圖F113中之區域A9與A10。而畫素P2、P3也隨著區域的變化而移到不同之位置。換言之，畫素P2、P3經過轉換函數轉換後也改變了其飽和度。此作法的好處在於利用轉換函數轉換各區域之畫素位置可平滑地調整畫素之飽和度，避免使轉換後之畫面產生畫素產生飽和度不連續之現象。本領域具有通常知識者也可依其需求，利用內差法來調整畫素之飽和度，在此不再贅述。According to the above embodiment, and FIG. 10-3 is another schematic diagram of color adjustment shown in FIG. 10-1 according to the present invention, please refer to FIG. 10-3. The picture 201 includes pixels P1 to P9. The screen 201 is changed to the color distribution map F101 after the step S101. On the other hand, the color distribution map F101 changes to the color distribution map F113 after the step S102. It is to be noted that the areas A7 and A8 in the color distribution map F101 are converted into the areas A9 and A10 in the color distribution map F113 after being converted by the conversion function. The pixels P2 and P3 also move to different positions as the area changes. In other words, the pixels P2 and P3 also change their saturation after being converted by the conversion function. The advantage of this method is that the conversion of the pixel position of each region by the conversion function can smoothly adjust the saturation of the pixel, and avoid the phenomenon that the pixel after the conversion is generated and the saturation of the pixel is discontinuous. Those with ordinary knowledge in the field can also use the internal difference method to adjust the saturation of pixels according to their needs, and will not be described here.
在部分實施例中亦可例如可在不改變HSI色彩空間之複數條色軸之條件下，調整多個畫素群中一特定畫素群的色調，以局部地調整在該HSI色彩空間中該特定畫素群之畫素的色調而不移動除了該特定畫素群以外的任何其它畫素群，其中特定畫素群具有在一預設範圍內的色調，預設範圍為全域色調的一部分。In some embodiments, for example, the hue of a particular pixel group in the plurality of pixel groups may be adjusted without changing the plurality of color axes of the HSI color space to locally adjust the HSI color space. A hue of a pixel of a particular pixel group without moving any other pixel group other than the particular pixel group, wherein the particular pixel group has a hue within a predetermined range, the preset range being a portion of the global hue.
本技術領域具有通常知識者也可視其需求，而依據本發明之精神與前述諸實施例之教示以轉換函數同時調整各個區域之分佈大小、分佈形狀與分佈位置，換言之可依其需求同時轉換各畫素之色調與飽和度，在此則不予贅述。Those skilled in the art can also view their needs, and according to the spirit of the present invention and the teachings of the foregoing embodiments, the distribution function, the distribution shape and the distribution position of each region are simultaneously adjusted by a conversion function, in other words, each can be simultaneously converted according to the needs thereof. The hue and saturation of the pixels are not described here.
本技術領域具有通常知識者也可視其需求，而依據本發明之精神與前述諸實施例來改變實施之方式。例如利用色調統計單元統計每一色調區域內之畫素數量，色彩引擎則依據統計之每一色調區域內之畫素數量產生轉換函數，色彩引擎再依據轉換函數調整視訊訊號之色彩。又例如利用亮度統計單元統計每一亮度之畫素數量，亮度迦瑪曲線則依據統計之每一亮度之畫素數量產生亮度迦瑪曲線，並依據亮度迦瑪曲線調整視訊訊號之亮度。The manner in which the person skilled in the art can also understand the needs of the present invention can be modified in accordance with the spirit of the present invention and the foregoing embodiments. For example, the color statistic unit is used to count the number of pixels in each tone region, and the color engine generates a conversion function according to the number of pixels in each tone region, and the color engine adjusts the color of the video signal according to the conversion function. For example, the brightness statistics unit is used to count the number of pixels of each brightness, and the brightness gamma curve generates a brightness gamma curve according to the number of pixels of each brightness, and adjusts the brightness of the video signal according to the brightness gamma curve.
綜上所述，本發明之實施例至少具有下列之優點：In summary, the embodiments of the present invention have at least the following advantages:
1.利用局部調整單元可針對視訊訊號之畫面中具有特定範圍之色調之第一畫素群，調整第一畫素群之色調、飽和度或亮度，同時保持畫面中其他畫素之色調、飽和度或亮度。1. The local adjustment unit can adjust the hue, saturation or brightness of the first pixel group for the first pixel group having a specific range of hue in the picture of the video signal, while maintaining the hue and saturation of other pixels in the picture. Degree or brightness.
2.利用局部調整單元可針對視訊訊號之畫面中具有特定範圍之色調且具有特定範圍之飽和度之第二畫素群，調整第二畫素群之色調、飽和度或亮度，同時保持畫面中其他畫素之色調、飽和度或亮度。2. The local adjustment unit can adjust the hue, saturation or brightness of the second pixel group for the second pixel group having a specific range of hue and saturation of a specific range in the picture of the video signal while maintaining the picture The hue, saturation, or brightness of other pixels.
3.色調統計單元可用以統計視訊訊號之畫面之多個畫素群之畫素數量，其中各個畫素群分別具有特定範圍之色調，並藉以調整視訊訊號。3. The tone statistic unit can be used to count the number of pixels of the plurality of pixel groups of the picture of the video signal, wherein each pixel group has a specific range of color to adjust the video signal.
4.透過轉換函數同時調整各個區域之分佈大小與分佈位置，藉以平滑地調整視訊訊號之畫素色調與飽和度。4. The distribution size and distribution position of each area are simultaneously adjusted by the conversion function, thereby smoothly adjusting the pixel hue and saturation of the video signal.
雖然本發明已以較佳實施例揭露如上，然其並非用以限定本發明，任何所屬技術領域中具有通常知識者，在不脫離本發明之精神和範圍內，當可作些許之更動與潤飾，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.
10‧‧‧視訊訊號接收器10‧‧‧Video signal receiver
20‧‧‧縮放引擎20‧‧‧Zoom engine
30‧‧‧色彩引擎30‧‧‧Color Engine
40‧‧‧輸出級40‧‧‧Output level
50‧‧‧面板50‧‧‧ panel
101‧‧‧局部調整單元101‧‧‧Local adjustment unit
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