TW391130B

TW391130B - Method and apparatus for contrast enhancement of color images

Info

Publication number: TW391130B
Application number: TW85110136A
Authority: TW
Inventors: Ching-Mei Huang; Hung-Ru Huang; Ruo-Tan Yau
Original assignee: Silicon Integrated Sys Corp
Priority date: 1996-08-20
Filing date: 1996-08-20
Publication date: 2000-05-21

Abstract

The invention provides a method and its circuit apparatus for contrast enhancement of color image that mainly includes the subjects as follows. The first computing unit that computes the corresponding I vale in the HIS color space for each pixel data of the decompressed color image. The second computing unit that computes all I values and outputs a new I value. A contrast enhanced computing unit that improves the brightness and color saturation degree of the image by use of the pixel data of the color image after being contrast-enhancement depressed by the new I values. A sampling computation unit is included additionally to sample part of the pixel data of the depressed color image and send it to the first computing unit. Such that, under the effects of keeping the brightness and the color saturation degree unchanged, the hardware cost is reduced. In addition, the invention is suitable for use in both the static and dynamic image picture.

Description

經濟部中央樣準局員工消費合作社印裝 A7 B7__ 五、發明説明（/) 1 本發明偽有閨於一種彩色影像對比加強之方法及其《路裝置，待別像有鬭於一種解壓缩後之彩色彩像，利用其在HSI色彩空間之對應I值，産生原彩色彩像對比加強之方法及其霣路装置。 5 按，為了減少影像傳输所需頻宽或皤存所霈的記慵韻，各種彩像壓缩技術被廣泛地使用。在壓缩及解壓缠的遇程中，往往會播牲部份高頻訊號以逋成歷缩效率及即時解壓縮，而使得解壓缩後的彩像頭得棋糊，色彩暗淡，逭時應用對比加強的技巧躭能重造色彩鮮艷生勡的影像。 10 對黑白影像來說，對比加強的技巧可利用拉大彩像亮度（luninance)的差異範園來增強對比；然而，對彩色影像除了亮度外邇要考«顔色的飽和度（saturation)及色度 (hue)。此外，同一種顔色在不同的色彩空間（color space) <- --- 15 有對應的空間座標值，因此要遘擇在何種色彩空間上作對比加強也是門學問。例如，在Y Cr Cb之色彩空間上加強對比時，發現當對比加強的乘數（contrast enhance factor) 加大時，會使得彩像的亮度提离，色彩匏和度減低。有鑑於此，本發明人基於傳統彩色彩像對比加強之未 20 臻理想，在兼顧整鼸設計登實用下稹棰研究改良，遂有本發明彩色彩像對比加強之方法及其«路裝置産生。邸，本發明之第一目的，在於提供一種利用原彩色彩像在HSI色彩空間之對應I值逢成彩色影像對比加強之方法及其電路裝置。 _第04頁_. 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) 裝· 訂經濟部中央樣準局員工消費合作社印裝 A7 B7 五、發明説明（2 ) 1 本發明之第二目的，在於提供一種彩色彩像對比加強之方法及其轚路裝置，對原彩色彩像之像素進行取樣，以減低硬匾之成本。本發明之第三目的，在於提供一種彩色彩像對比加強 5 之方法及其霣路裝置，除可對靜態的單一彩像畫面進行對比加強外，更可對動態的畫面進行對比加強者。緣是，為建上述目的，本發明之第一特微你在於包括一第一計算單元，以計算解壓编後彩色膨像之毎餹像素資料在HSI色彩空間中對應之I值；一第二計算單元，以計 10 算所有I值，输出一新I值；及一對比加強運算單元，以利用新I值搿比加強解壓缩後彩色彩像的毎鵃像素資料，使影像在亮度及色彩飽和度得以改菩。本發明之第二特微你在於更包括一取樣運算單元,以、取樣上述解壓缩後彩色影像之部份像素資料i上述第一計 15 箄單元，該取樣蓮算單元包括有一第三計算單元、一比較器、一計數器、及一取樣黏數比較器，其中該第三計算單元包括有一累加器，用以毎讀取一餹像素即累加一預設之取樣參數（大於零之整數），而輪出一累加值，及一減法器；該比較器，其參考值則為一預設之計數最大值，且當 20 比較某點像素之累加值大於該參考值時，邸输出一取樣倍號至上述第一、第三計算單元，該第一計算單元邸計算出該黏像素之對應I值，且第三計算箪元之減法器邸將該累加值減去參考值，並自差值繼鑛累加取櫬參數；該計數器，每接受一次比較器输出之取樣倍號，即累加—1"，且 __第05頁_ 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ϊ 1 ^^1 n In— m 1 ί I— 1 n 1^1 (請先閲讀背面之注意事項再填寫本頁) 經濟部中夬標準局員工消費合作社印製 A7 B7_ 五、發明説明（) 1 输出一累加值至取樣點數比較器，該取樣點數比較器參考值則為一預設之取樣點數目，當上述計數器輸出之累加值等於取樣黏數目時即輪出一結束取樣信號至上述第一計算單元，以停止取樣黏之蓮算，而將所有取樣點之對應I值 5 输入第二計算單元，以在不滅亮度及色彩飽和度之效果下，減少硬體所需成本者。本發明之第三特欲像在於上述第二計算單元内更包括一暫存器及一權數乘加單元，而以該暫存器用來暫存前幾張彩像的新I值，然後再經權數乘加單元將逭些新I值乘 10 上適當的權數後相加後做為下一張彩像對比加強的新I值，達到動戆影像對比加強之目的效果者》茲配合鼷示，将本發明彩色影像鲟比加強之方法及其霣路裝置之較佳實施例，詳細説明如下，以期能對本發明之優點，目的及待揪，能獲得進一步之充分瞭解。 15 第一圔為本發明彩色影像對比加強之方法及霣路装置之«路方塊_。第二圓為第一圖中第一計算單元之第一實施例《路方 r-*' 塊_〇第三B為第一中第一計算單元之第三實施例霣路方 20 塊疆。第四為第一_中第二計算單元計算中值之霣路方塊A7 B7__ printed by the Consumer Cooperatives of the Central Bureau of Procurement of the Ministry of Economic Affairs V. Description of the Invention (/) 1 The invention is based on a method for enhancing the contrast of a color image and its "road device. The color image of the color image uses its corresponding I value in the HSI color space to generate a method for enhancing the contrast of the original color image and its road device. 5 Press. In order to reduce the bandwidth or memory required for image transmission, various color image compression techniques are widely used. In the process of compression and decompression, some high-frequency signals are often broadcasted to achieve historical compression efficiency and instant decompression, so that the decompressed color picture head is blurred, the color is dim, and contrast is often applied. Enhanced techniques will not recreate brightly colored images. 10 For black-and-white images, the technique of contrast enhancement can make use of widening the difference in luminosity of the color image to enhance the contrast; however, for color images, in addition to the brightness, «saturation and color Degree (hue). In addition, the same color has corresponding spatial coordinate values in different color spaces <---- 15, so it is also a matter of choosing which color space to compare and strengthen. For example, when the contrast is enhanced in the color space of Y Cr Cb, it is found that when the contrast enhancement factor is increased, the brightness of the color image is lifted off, and the color intensity is reduced. In view of this, the present inventor based on the traditional ideal of color image contrast enhancement, and researched and improved the design while taking into account the overall design. Therefore, the method for color image contrast enhancement of the present invention and its «road device production» . The first object of the present invention is to provide a method and circuit device for enhancing the contrast of a color image using the corresponding I value of the original color image in the HSI color space. _Page04_. This paper size applies to China National Standard (CNS) A4 (210X297mm) (Please read the precautions on the back before filling this page) A7 B7 V. Description of the invention (2) 1 The second object of the present invention is to provide a method for enhancing the contrast of a color image and a road device thereof, sampling the pixels of the original color image to reduce the cost of a hard plaque. A third object of the present invention is to provide a method for color image contrast enhancement 5 and a roadway device thereof. In addition to contrast enhancement of a static single color image frame, it is also capable of contrast enhancement of a dynamic image. The reason is that in order to achieve the above purpose, the first feature of the present invention is that it includes a first calculation unit to calculate the I value corresponding to the H pixel color space of the pixel data of the color expansion image after decompression; a second A calculation unit that calculates all I values by 10 and outputs a new I value; and a contrast enhancement operation unit to enhance the pixel data of the decompressed color image by using the new I value / ratio, so that the image is in brightness and color Saturation can be changed. The second special feature of the present invention is that it further includes a sampling operation unit for sampling the pixel data of the decompressed color image. The above-mentioned first counting unit is 15 mm, and the sampling calculation unit includes a third calculation unit. , A comparator, a counter, and a sampling sticky number comparator, wherein the third calculation unit includes an accumulator for accumulating a preset sampling parameter (an integer greater than zero) by reading a pixel, An accumulative value and a subtractor are rotated out; the reference value of the comparator is a preset maximum count value, and when the accumulated value of the pixels at a certain point of comparison 20 is greater than the reference value, the sampling output is doubled. To the first and third calculation units described above, the first calculation unit calculates the corresponding I value of the sticky pixel, and the subtractor of the third calculation unit subtracts the reference value from the accumulated value and subtracts the difference value. Following the mining accumulation, the parameter is incremented; this counter is incremented every time it receives the sampling multiple of the comparator output, and __page05_ This paper size applies to the Chinese National Standard (CNS) A4 specification (210X297) %) 1 ^^ 1 n In— m 1 ί I— 1 n 1 ^ 1 (Please read the notes on the back before filling in this page) Printed by A7 B7_, Consumer Cooperatives of the China Standards Bureau of the Ministry of Economic Affairs V. Description of the invention () 1 Output an accumulated value to the sampling point number comparator. The reference value of the sampling point comparator is a preset number of sampling points. When the accumulated value of the counter output is equal to the number of sampling sticks, an end sampling signal is output to the above. The first calculation unit is to stop sampling the sticky lotus, and input the corresponding I value 5 of all sampling points to the second calculation unit, in order to reduce the cost of hardware under the effect of constant brightness and color saturation. The third special image of the present invention is that the second calculation unit further includes a register and a weight multiply-add unit, and the register is used to temporarily store the new I values of the previous color images, and then the The weight multiplication and addition unit will multiply these new I values by 10 with appropriate weights and add them as the new I value for the next color image enhancement to achieve the effect of enhancing the contrast of the image. The preferred embodiment of the method for enhancing the color ratio of the color image of the present invention and the roadway device thereof will be described in detail in the hope that the advantages, objectives, and requirements of the present invention can be fully understood. 15 The first method is the method of enhancing the contrast of color images and the device of the present invention. The second circle is the first embodiment of the first calculation unit in the first figure "Road side r- * 'block_〇 The third B is the third embodiment of the first calculation unit in the first road unit. The fourth is the Kushiro block of the first _ second calculation unit that calculates the median

第五疆為一 4X4矩陣，其内具有毎一像素所對應之I 值〇 ___第06頁_ 本紙張尺度適用中國國家標準（CNS ) A4規格（2丨〇父297公釐） I- n^l — nn —^ϋ — n ml nn ^ (請先閲讀背面之注意事項再填寫本頁) 五、發明説明（斗） 15 A7 B7 第六·為第五隱中毎籲不同I值之像素數目的分佈曲線鼷。第七·為第五麵中之像素在每餹I值内的累計分佈曲鎳疆。第八·為第一中第二計算單元計算平均值之《路方塊圓。 _九鼷為一適用於本發明之取樣霣路方壤·。第+為本發明彩色影像對比加強之方法及霣路装置之一較佳實施例霣路方塊·。第十一_為第一、+圔中對比加強邇算單元之較佳實施例《路方塊·。第十二為第十匾變化實施於動態像$霣路方塊匯. (請先閲讀背面之注意事項再填寫本頁) 裝- -6 經濟部中央樣準局貝工消費合作社印裝 20 鼷號對照： 1第一計算單元 10 除法器 12 計數器 2第二計算單元 20中值計算器 22 平均值計算器 24 第二暫存器 3對比加強麵》單元 30 差值計算器 32 加法器 11 累加器 13 多工器 21暫存器 23 暫存器 25 權數乘加單元 31對比加強增益蓮算器 \ 第07頁本纸張尺度適用中國國家梯準（CNS ) A4規格（210X297公釐）經濟部中央樣準局貝工消費合作社印裝 A7 B7 五、發明説明（s) 1 4取樣邐算單元 40 第三計算單元 41比較器 42 計數器 43 取樣點數比較器讅參閲第一所示，為本發明彩色彩像獬比加強之方 5 法及《路裝置之《路方塊匾，包括有一第一計算單元1，以計算解壓编後彩色彩像之毎餹像素資料在HSI色彩空間中對應之I值；一第二計算單元2,以計算上述所有I值，以輪出一新I值；及一對比加強蓮算單元3,接受上述新I值，以將解壓縮後彩色影像的毎僮像素資料作對比加 10 強。其中，若解S缠後之彩色彩像供屬RgB色彩空間，則 HSI色彩空間與RGB色彩空間的轉換B像式即如下所示： H=C0S-Ml/2 [(R-G) + (R-B)]/ [ (R-β)2 + (R-B) (G-B) ] } ............................................(1) 15 S=l-3/(R + G + B) [ain(R,Gf B)].....................(2) I=(R + G + B)/3. . ................................(3) 其中：H表示色度；S表示飽和度；I表示亮度。上述第一計算單元1則是用來計算上式（3),而在本發明之^實施例中，謫參開第二所示，該Ϊ一計算單 20 元1包括有一除法器1〇,以將同一像素資料之R、G、B值除以3而輪出R/3, G/3, B/3值；及一累加器11,將上迷 R/3，G/3, B/3值相加而输出（R+G+B)/3 ,邸I值。第一計算單元1之第二實施例供將第二之除法器改用一計算器，将同一像素賫料之R、G、B值分別以（1/4 + 第08頁本紙張尺度適用中國國家標準（CNS ) Α4规格（210X297公釐） - 1 i— I ITU In H^I ! i I I I (資先閲讀背面之注意事項再填寫本頁)The Fifth Xinjiang is a 4X4 matrix, which has an I value corresponding to one pixel. ______Page 06_ This paper size applies the Chinese National Standard (CNS) A4 specification (2 丨〇 parent 297 mm) I- n ^ l — nn — ^ ϋ — n ml nn ^ (Please read the notes on the back before filling out this page) V. Description of the invention (bucket) 15 A7 B7 Sixth: Call for different I values in the fifth cover The distribution curve of the number of pixels 鼷. Seventh is the cumulative distribution curve of the pixels in the fifth plane within each 餹 I value. Eighth: The road square block circle which calculates the average value for the first and second calculation units. _ Jiuyi is a sampling Kushiro soil suitable for the present invention. The first + is a preferred embodiment of a method and a device for color contrast enhancement of a color image of the present invention. The eleventh _ is a better embodiment of the first and + contrast-enhanced computing units "Road Blocks." The twelfth is the tenth plaque change implemented on the dynamic image $ 霣路方汇. (Please read the precautions on the back before filling out this page) Pack--6 Printed by the Central Laboratories Bureau of the Ministry of Economic Affairs Contrast: 1 first calculation unit 10 divider 12 counter 2 second calculation unit 20 median calculator 22 average calculator 24 second register 3 contrast enhancement surface "unit 30 difference calculator 32 adder 11 accumulator 13 Multiplexer 21 Register 23 Register 25 Multiply and add unit 31 Contrast gain gain calculator \ Page 07 This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) Central Ministry of Economic Affairs Printed by the Bureau of Specimen Cooperative Consumer Cooperatives A7 B7 V. Description of the invention (s) 1 4 Sampling calculation unit 40 Third calculation unit 41 Comparator 42 Counter 43 Sampling point comparator Invented the method 5 for enhancing the color ratio of color images and the road block plaque, which includes a first calculation unit 1 to calculate the corresponding I of the pixel data of the decompressed color image in the HSI color space. Value; a second calculation unit 2, In order to calculate all the above-mentioned I-values, a new I-value is calculated; and a contrast-enhancing lotus calculation unit 3, which accepts the above-mentioned new I-values, in order to compare and strengthen the child pixel data of the decompressed color image with a strong 10. Among them, if the color image after the unwrapping is for the RgB color space, the conversion of the HSI color space to the RGB color space is as follows: H = C0S-Ml / 2 [(RG) + (RB) ] / [(R-β) 2 + (RB) (GB)]} ... ............ (1) 15 S = l-3 / (R + G + B) [ain (R, Gf B)] ............ ......... (2) I = (R + G + B) / 3 ... ....... (3) where: H represents chroma; S represents saturation; I represents brightness. The first calculation unit 1 is used to calculate the above formula (3), and in the embodiment of the present invention, as shown in the second, the first calculation unit 20 yuan 1 includes a divider 10, The R / 3, G / 3, and B / 3 values are rounded out by dividing the R, G, and B values of the same pixel data by 3; and an accumulator 11 will add R / 3, G / 3, B / Add the 3 values and output (R + G + B) / 3, the value of I. The second embodiment of the first calculation unit 1 is used to change the second divider to a calculator, and the R, G, and B values of the same pixel data are divided by (1/4 + page 08) National Standard (CNS) Α4 Specification (210X297 mm)-1 i— I ITU In H ^ I! I III (Please read the notes on the back before filling this page)

*1T 丨外經濟部中央標準局貝工消費合作社印装 A 7 B7 五、發明説明（6 ) 1 1/16 + 1/64----)之運算遍近而輪出R/3, G/3, B/3值至上述累加器11輪出（R+G+B)/3。而第一計算單元1之第三實施例，讅參閲第三鬭所示，包括一毎次數到2又會再從0两始數之計數器12,以输 5 出〇、1、2三籲控制倍號；一多工器13,分別接受三值連鑛儋素資料（Rl、Gl、B1)(R2、G2、B2)(R3、G3、B3)及上述控制倍«，在本較佳*施例中，當該多工器13接,受第一控制倍》| 〇#時輪出第一鑌像素賫料（R1、Gl、B1)的R1 值，接受第二控制信» " 1"時輪出第二《像索（R2、G2 10 、B2)的G2值，及接受第三控制倍虢* 2 #時輪出第三梅像素資料（R3、G3、B3)的B3值；及上述累加器11,將R1、 G2、B3三值相加，因為影像的待性使鄰近像素的R、G、B 值幾乎相同或僅有缓慢的增《，故R1 + G2 + B3之累加值， [1/3(R1 + G1 + B1) + 1/3(R2 + G2 + B2) + 1/3(R3 + G3 + B3)]之累加 15 值。再者，上述第二計算器2你用來取得上述所有像素I 值之中值或平均值；其中：中倌取法如下: r — I > 1 . 一串數列的中值（median)定義為在逭串數列中半數的數值小於逭值中值，而另外一半的數值則大於中值。根據 20 Philip E.Mattison的描述，影像的對比加強可依下列式子達成：* 1T 丨 Printed by the Central Standards Bureau of the Ministry of Foreign Affairs, Shellfish Consumer Cooperatives A 7 B7 V. Description of the invention (6) 1 1/16 + 1/64 ----) The calculations are rounded up and R / 3, G are rotated out / 3, B / 3 value to the totalizer 11 round out (R + G + B) / 3. The third embodiment of the first calculation unit 1 is shown in FIG. 3, and includes a counter 12 that counts from 2 to 2, and then counts from 0 to 2, and outputs 5 outputs of 0, 1, 2, and 3. Control multiplier number; a multiplexer 13 that accepts three-value continuous ore element data (Rl, Gl, B1) (R2, G2, B2) (R3, G3, B3) and the aforementioned control multiplier «, better in this book * In the example, when the multiplexer 13 is connected, it is subject to the first control times. | 〇 # The R1 value of the first pixel data (R1, Gl, B1) is rounded off, and the second control letter is accepted »" 1 " Time to get the second "G2 value of the image cable (R2, G2 10, B2), and accept the third control time 虢 * 2 #Time to show the third Mei pixel data (R3, G3, B3) B3 value ; And the accumulator 11 above, the three values of R1, G2, and B3 are added, because the R, G, and B values of adjacent pixels are almost the same or only increase slowly because of the waiting property of the image, so R1 + G2 + B3 Accumulated value, the value of [1/3 (R1 + G1 + B1) + 1/3 (R2 + G2 + B2) + 1/3 (R3 + G3 + B3)] is added to 15 values. Furthermore, the second calculator 2 you used to obtain the median or average value of the I values of all the pixels; where: the median selection method is as follows: r — I > 1. The median of a series of numbers is defined as Half of the values in the 逭 series are less than the median of 逭, and the other half are greater than the median. According to 20 Philip E. Mattison, the contrast enhancement of the image can be achieved by the following formula:

Pixel_Value = (Pixel_Value - Median_Value) XPixel_Value = (Pixel_Value-Median_Value) X

Contrast.Enhanceaent.6ain + Median.Value 如上所述，當使用在彩色彩像時，本發明将之修正為 _第09頁_ 本紙張尺度適用中國國家標準（CNS ) A4洗格（210X 297公釐） I- — - - «1— el^i -=r- — I I «II is -- — —-II ('請先閲讀背面之注意事項再填寫本頁) 五、發明説明（7 ) 15 A7 B7 經濟部中央橾準局員工消费合作社印装 20Contrast.Enhanceaent.6ain + Median.Value As mentioned above, when used in color images, the present invention will modify it to _ page 09 _ This paper size applies the Chinese National Standard (CNS) A4 Washing (210X 297 mm) ) I- —--«1— el ^ i-= r- — II« II is-— —-II ('Please read the notes on the back before filling out this page) 5. Description of the invention (7) 15 A7 B7 Printed by the Consumers' Cooperatives of the Central Government Bureau of the Ministry of Economic Affairs 20

Median.I Median of I Enhanced_R=(R-Median_I)xContrast_Enhance«ent_Gain + Median_I...........................(4) Enhanced_G=(G-Median_I)x Contrast_Enhanceient_6ain + Median_I...........................(5) Enbanced_B=(B-Nedian_I)xContrast_Enhanceaent_6ain + Median_I...........................(6) 而要計算一張彩像的中值，請參閲第四所示，上述第二計算單元2包括一中值計算器20及一轚存器21,而以該中值計算器20统計像素（Pixel)在HSI色彩空間所對應的I值，毎值不同I值的像素數目；再將不同之I值由小 I 到大累加各值I值之像素數目，直至_累加到U值之像素數目後超隹目之—半，則該I值邸為中值；及 ------- --- 該暫存器21則用來儲存該中值。例如第五圃所示，為一 4X4的矩陣，其内之數字則是毎一像素所對應之I值，該矩陣之像素，其毎齷不同I值之像素數目的分佈曲嫌如第六所示，而像素在每镳I值内的累計分佈曲》如箄;t·所示。由第五〜t麵可以看到矩陣之16镳像素數目中超遇一半（10儀）儋素的I值小於或等於2,因此這矩陣的中值是為2。當取平均值時，本發明再次將上式（4)(5)(6)分別修正如下： Mean.I <- Mean of I 第10頁本紙張尺度適用中國國家標準（CNS ) A4规格（210X297公釐）請' 先閲讀背之注 2 奢訂五、發明説明（θ 15 A7 B7 經濟部中央樣準局貝工消费合作社印装 20Median.I Median of I Enhanced_R = (R-Median_I) xContrast_Enhance «ent_Gain + Median_I .............. (4) Enhanced_G = (G-Median_I) x Contrast_Enhanceient_6ain + Median_I ........... (5) Enbanced_B = (B-Nedian_I) xContrast_Enhanceaent_6ain + Median_I. ................ (6) To calculate the median value of a color image, please refer to the fourth figure. The two calculation units 2 include a median calculator 20 and a register 21, and use the median calculator 20 to count the I values corresponding to pixels in the HSI color space, and the number of pixels with different I values. Then add the number of different I values from small I to large and accumulate the number of pixels of each value I value, until _ accumulated to the number of pixels of U value is more than half of the number, then the I value is the median value; and ----- ---- The register 21 is used to store the median value. For example, as shown in the fifth garden, it is a 4X4 matrix, and the numbers in it are the I values corresponding to one pixel. The distribution of the number of pixels in the matrix and the number of pixels with different I values is like the sixth one. T, and the cumulative distribution curve of pixels within each 镳 I value is shown as 箄; t ·. From the fifth to t planes, it can be seen that half of the 16 pixels in the matrix are more than half (10 meters), and the I value of the element is less than or equal to 2, so the median value of this matrix is 2. When the average value is taken, the present invention modifies the above formulas (4), (5), and (6) respectively again as follows: Mean.I <-Mean of I Page 10 This paper size applies the Chinese National Standard (CNS) A4 specification ( 210X297 mm) Please read the note 2 of the back first. V. The description of the invention (θ 15 A7 B7) Printed by the Central Bureau of Specimen Bureau of the Ministry of Economic Affairs.

Enhanced.R=(R-Hean_I)x Contrast,Enhance*ent_Gain + Mean_I.............................(7) Enhanced_G=(G-Mean_I)x Contrast.Enhanceient.Gain +Mean_I.............................(8) Enhanced_B=(B-Mean_I)xContrast_Enhanceient_Gain + Hean_I.............................(9) 而要計篡一張彩f的平均值^讅參颺第八所示，該第二計算簞元2包括一平均值計算器22及一暂存器23,而以該平均值計算器22將所有像素之I值累加除以所有像索數目，以输出所有像素之平均I值；及該暫存器23則用來鍺存上述之平均I值。提得一提的是，當上述所有像素數目設定為2的專次方嫡像素，則在執行除法時就不需要除法器，只要把I的累加值往左方移幾鶬位元邸可完成除法，如此節省硬讎上之成本者。同理，以第五鼸之矩陣為例，其算術平均值為2.12, 和實際中值有差距但不失為一可行的替代方法。又，因参的對從《黼設計者的 _黏來看，計先為了统計像素I值分佈的情形，就必須有足夠多的暫存器來記錄有多少籲倕素落在逭些值I值上；再者，毎鶴暫存器所能«存在最棰纗的情況下必須等於整張彩像像素的數目，所以毎籲暫存器都必須夠大，更不用説累稹像素數目的累加器了。比如轵一張352 X 240彩色的彩像就霈要25S®暫存器來第11頁本紙張尺度速用中國國家梯準（CNS ) A4規格（210X297公釐） Γ請先閲讀背面之注意事項再填寫本頁)Enhanced.R = (R-Hean_I) x Contrast, Enhance * ent_Gain + Mean_I ............. (7) Enhanced_G = (G-Mean_I) x Contrast.Enhanceient.Gain + Mean_I ............. (8) Enhanced_B = (B -Mean_I) xContrast_Enhanceient_Gain + Hean_I .............. (9) And calculate the average value of a color f ^ As shown in the eighth embodiment, the second calculation unit 2 includes an average calculator 22 and a register 23, and the average value of all pixels is divided by the number of all pixels by the average calculator 22 To output the average I value of all pixels; and the register 23 is used to store the above average I value. It is worth mentioning that when all the above pixels are set to the second-order square pixels, a divider is not required when performing the division, as long as the accumulated value of I is shifted to the left by a few bits. Divide, so save the cost on the hard disk. Similarly, taking the matrix of the fifth unit as an example, its arithmetic mean is 2.12, which is a gap from the actual median, but it is a feasible alternative. In addition, from the point of view of the "Designer's Guide", in order to count the distribution of pixel I values, there must be enough registers to record how many pixels fall on these values I Value; moreover, the crane register must be equal to the number of pixels of the entire color image in the most existing case, so the call register must be large enough, let alone the number of accumulated pixels The accumulator is up. For example, a color image of 352 X 240 color does not require a 25S® register. Page 11 Quickly use the Chinese National Standard (CNS) A4 size (210X297 mm) on this paper. Γ Please read the notes on the back first (Fill in this page again)

A7 B7 15 五、發明説明（？）記錄I值的分佈，毎健暫存器都必須有17籲位元以記錄可的@ 了值均和w的情況，而累稹像素數目的加法器也必須為17值位元。而利用平均值的對比加強，在硬體計算平均值並非如吾人在直覺上所想的那般容易。首先必須有梅夠大的累加器以累計彩像所有像素的I值，接著要有铕除法器，其除數及被除數都相當的大。以上述352X 240的彩色彩像（非 2的霉次方）為例，所有像素的I累加值（被除數）可能大至需要25價位元表示，而除數則為17籲位元，所以要實現道值除法器的代價也相當得离。基於上述方法及霣路裝置所需之««成本太高，於是本發明藉由取樣待定數目的像袤夾KLiUJn所有的儋素求取平價。取樣黏數目在本較佳實施例中均設定為二的軍 _______- , 次方以籣化除法器之運算；且取樣參數（CTRFACT)則由影像像素數目（Iiage_Size)、取樣酤數目（Saiple_No)、及計數最大值（Max_Range)三键參數決定如下：影像像素數目計數最大值 (#*先閲讀背面之注意事項再填寫本頁} 經濟部中央橾隼局貝工消费合作社印装 20 彩嫌像素數目-取樣黏數目計數最大值-取樣參數取樣參數=ceil 取樣黏數目X計數最大值彩供儋素數目 (11) 第12頁本纸張尺度逋用中國國家標準（CNS ) A4規格（210X297公釐）經濟部中央橾準扃真工消费合作社印裝 A7 B7 五、發明説明（丨ο ) 1 其中彩像像素數目是由被處理之彩像大小而定，取樣貼數目是指被取樣來計算平均值的儋素數目，且該取樣黏數目和影像像素數目之比值卽為取樣率。 4 ceil 〃表示取最小整數，故當取樣確定後，依照上 5 式（Π),吾人可藉由讖整計數最大值使取樣參數符合硬體上設計的要求，及取樣率的精確度。例如吾人認為合理的取樣率（取樣點數目/所有像素數目）是在2%〜20%, 此時若計數最大值小於5,則依上式（11),其取樣參數皆為〇,根本不可能進行取樣。若取樣參數要是大於零之整 1〇數，則計數最大值必須大於50。從另一餾角度來看，若計數最大值為256 ,同理，依上式（11)，則無法B分2.39% 舆2.0%的取樣率，亦邸精確度不高，故計數最大值之上限則可依所需要之精確度來設定。藉由上述原理，本發明更包括一取樣運算單元4,請 15 參閲第九圓所示，以取樣上述解fi缩後彩色彩儋之部份像素賫料至上述第一計算單元1。該取櫬蓮算單元4包括有一第三計算單元40、一比較器41、一計數器42、及一取樣黏數比較器43,其中：該第三計算單元40包括有一累加器400,用以毎讀取一 20 嫡像素即累加上述設定之取樣參數（大於零之整數），而输出一累加值，及一減法器401。 · 該比較器41,其參考值則為上述設定之計數最大值，且當比較某»儋索之累加值大於該參考值時，即輸出一取樣倍號至上述第一計算單元1及上述第三計算單元40,該第13頁本纸張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) 裝· ,ιτ 經濟部中央標準局負工消費合作社印裝 A7 B7_ 五、發明説明（"） 1 第一計算單元1即計算出該點像素之對應I值，而該第三計算單元40之減法器401即将該累加值減去參考值，並自差值繼鑛累加取樣參數。該計數器42,毎接受一次比較器4 2輪出之取樣倍號， 5 即累加>1"，且輸出一累加值，其累加值邸為取樣點數目。該取樣點數比較器43,其參考值則為上述設定之取攆黏數目，當上述計數器42输出之累加值等於取樣黏數目時二即輪出一結束取櫬倍號至上述第一計算單元1以停止取懞 10 黏之蓮算，且由該第一計算單元1将所有取樣點之對應I 值输入上述第二計算單元2,以输出一新I值者。再請參閲第十圏所示，本發明將上述取樣麵算單元4 配合第四圓之第一計算單元1，並以求^取平均值的方式為一較佳組合實施例，如上所述，本發明毎讀取一籲像素， 15 該取櫬運算單元4之比較器41邸輪出一取嫌倍號，及取樣黏數比較器43输出一結束取樣倍號；此時，第一計算單元 1之計數器12毎接收到上逑比較器41輸出之取樣信號即累加"1",該計數器12為一毎次數到2又會再從0開始數起之計數器，其输出> 〇〃、* 1〃、或> 2〃作為選擇控 20 制倍號至多工器13以邐擇像素的R、G、或B至累加器11進行累加到該累加器11接受上述取樣黏數比較器43輪出之结束取櫬倍號為止。接著，該累加器11邸將I的累加值输出至第二計算單元2,執行将I的累加值除以取樣黏數目的蓮算，同理， __第14頁_ 本纸張尺度逍用中國國家標準（CNS ) ΑΊ規格（210X297公釐） I.-1------------裝------訂------\ i' (· 請先閲讀背面之注意事項再填寫本頁) 經濟部中央標準局男工消費合作社印製 A7 _B7_ 五、發明説明（/2) 1 值得一提的是當取樣黏數目設定為2的蓽次方時，則執行除法時便不需要除法器蓮算，只要把I的累加值往左方移幾值位元卽可完成除法，如此更可節省硬鼸上之成本。而該第二計算單元2的輪出便是目前彩像畫面的I平均值， 5 供若是做靜態彩像的對比加強，則上述對比加強蓮算單元 3邸讀取原彩像之R、G、B及上述第二計算單元2之I平均值做對比加強運算後再送往顧示器。在本較佳實施例中 ,該對比加強蓮算單元3如第十一_所示.包括有三fi差值計算器30,分別接受上述像索資料之R、G、B值，及共 1〇同接受上述I平均值，以分別输出該R、G、B輿新I值之差值；三值對比加強增益蓮算器31,分別連接上述三僮差值計算器30,以將上述差值放大；及三俪加法器32,分別連接上述三值對比加強增益蓮算器31,及共同接受上述新 I值，以將放大後之差值再加回原減去之新I值，得到R’ 15 、G’、B’值，便是被對比加強後之像素者。又，將上述的對比加強方法直接蓮用在動態影像時，所遇到的困難就是影像的I平均值（邸新I值）的産生時間較該張影像的願示時間有一張盡面的延遲，也就是説除非有額外的暫存元件，否則當一張影像的平均I值被算出 2〇的同時，該張彩像已願示完畢，所以該張彩像的對比加強無法如靜態影像一般以本身的I平均值做蓮算。因此，在做動態彩像的對比加強時，請參閲第十二園所示，本發明在第二計算單元2内更包括一第二暫存器24及一權數乘加單元25,其中該第二暫存器24接於該第二計算單元2之平 ___第15頁_ 本紙張尺度逍用中國國家標準（CNS ) A4規格（210X297公釐） -! —^1 - * - I III - I - 1 - H II . { n (t先閲讀背面之注意事項存填寫本頁) 經濟部中夬標準局貝工消費合作社印製 • A7 _______B7 ______ 五、發明説明（/3 ) 1 均值計算器22，以用來暫存前幾張影供的I平均值•然後再經權數乘加單元25将逭些I平均值乘上濂當的權數後相加後鍺存於第二計算單元2之暫存器23,以做為下一張彩像對bb加強的I平均值，而上述前幾張影像，在硬體的變 5 化實施上，可經由調整決定I平均值是由先前2、4、8或 ---- 6張彩像的權數乘加者。 ....一. --" _是，本發明除了對比加強外並配合HSI色彩空間之亮度I值的讕整，處理後的彩像在亮度及色彩飽和度上都相當令人谋意，確實將解S縮後的彩像晝面棋期，色彩暗 10 淡之~«_黏解除，且其中之取樣方法，更使本發 ' — 一. 一 ' 此外，在上述本k明之較佳實施例中，其解壓縮後之影像資料皆偽以RGB色彩空間做説明，而因各龆不同的色彩空間僅為習知數值的轉換，是以，本發明所用HSI色彩空間之亮度I值之中值或平均值亦可逋用於 15 YCbCr等色彩空鬨做對比加強者。综上所述，本發明之彩色彩像對比加強之方法及其霣路装置，確可藉由以上技術之掲露，連到預期之使用目的 ,以及功效之長足增進，且，本索於申請前並未有相同之設計公醑使用，誡符發明專利之新潁性、實用性、進步性 20 及産業上利用價值等諸要件，爱依法提出専利申讅。惟，以上所述者，僅為本發明之較佳實施例，大凡熟悉此項技藉人士，依據本發明之精神所作之變化，仍應包括於本案之專利鲔_内。第16頁 ^紙張尺度適用中國國家梯準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) » n^i Ik.—· In . ,A7 B7 15 V. Description of the invention (?) To record the distribution of I values, the health register must have 17 bits to record the possible @ average and w values, and the adder that accumulates the number of pixels. Must be 17 value bits. However, using the average value to enhance the comparison, calculating the average value in hardware is not as easy as we intuitively think. First, there must be an accumulator large enough to accumulate the I values of all pixels of the color image, and then there must be a unitary divider, whose divisor and dividend are quite large. Taking the above-mentioned 352X 240 color image (not a power of 2) as an example, the I cumulative value (dividend) of all pixels may be as large as 25 valence units, and the divisor is 17 units, so The cost of implementing a track divider is quite significant. Based on the above method and the required cost of the road device, the cost is too high, so the present invention obtains a parity by sampling all the pixels of a predetermined number of image clips KLiUJn. In this preferred embodiment, the number of sampling sticks is set to two army _______-, the power of which is calculated by the unitized divider; and the sampling parameter (CTRFACT) is determined by the number of image pixels (Iiage_Size) and the number of sampling units (Saiple_No). ), And the maximum count (Max_Range) three-key parameters are determined as follows: Maximum number of image pixel counts (# * Read the notes on the back before filling this page} Printed by the Central Bureau of the Ministry of Economic Affairs Number of pixels-Maximum number of sampling sticks count-Sampling parameter = ceil Number of sampling sticks X counts maximum Number of color supply units (11) Page 12 This paper uses China National Standard (CNS) A4 (210X297) (Mm) Printed by the Central Government of the Ministry of Economic Affairs, Real Industrial Consumer Cooperatives A7 B7 V. Description of the Invention (丨 ο) 1 Where the number of color image pixels is determined by the size of the color image being processed, and the number of sample stickers refers to the sampled Calculate the average number of primes, and the ratio of the number of sampling sticks to the number of image pixels 卽 is the sampling rate. 4 ceil 〃 means taking the smallest integer, so when the sampling is determined, follow the formula 5 above. Π), we can round the maximum value to make the sampling parameters meet the design requirements on the hardware, and the accuracy of the sampling rate. For example, I think the reasonable sampling rate (the number of sampling points / the number of all pixels) is 2% ～ 20%, at this time if the maximum value of the count is less than 5, according to the above formula (11), the sampling parameters are all 0, it is impossible to sample at all. If the sampling parameter is greater than zero and the whole number is 10, the maximum value of the count is Must be greater than 50. From another perspective, if the maximum value of the count is 256, similarly, according to the above formula (11), the B-score cannot be 2.39% and the sampling rate is 2.0%, so the accuracy is not high, so The upper limit of the maximum counting value can be set according to the required accuracy. By the above principle, the present invention further includes a sampling operation unit 4, please refer to the ninth circle to sample the decolorized color color Some of the pixels are reported to the above-mentioned first calculation unit 1. The lotus calculation unit 4 includes a third calculation unit 40, a comparator 41, a counter 42, and a sampling viscosity comparator 43, wherein: The third calculation unit 40 includes an accumulator 400 for reading an 20 嫡 pixels accumulate the sampling parameters set above (an integer greater than zero), and output an accumulated value and a subtractor 401. · The comparator 41, whose reference value is the maximum count value set above, and when compared When the accumulative value of a certain cable is greater than the reference value, a sampling multiple is output to the above-mentioned first calculation unit 1 and the above-mentioned third calculation unit 40. The page 13 of this paper applies the Chinese National Standard (CNS) Α4 Specifications (210X297mm) (Please read the precautions on the back before filling out this page) Installation, ιτ Printed by the Central Standards Bureau of the Ministry of Economic Affairs, Consumer Cooperatives A7 B7_ 5. Description of the invention (1) First calculation unit 1 That is, the corresponding I value of the pixel at that point is calculated, and the subtractor 401 of the third calculation unit 40 subtracts the reference value from the accumulated value, and then accumulates the sampling parameters from the difference. The counter 42 receives the sampling multiples from the comparator 4 in two rounds, 5 is accumulated > 1 ", and outputs an accumulated value whose accumulated value is the number of sampling points. The reference value of the sampling point number comparator 43 is the number of sticking points set as described above. When the accumulated value output by the counter 42 is equal to the number of sampling sticks, two are rolled out and the number of times is taken to the first calculation unit. 1 to stop taking Mongolian 10 sticky lotus, and the first calculation unit 1 inputs the corresponding I values of all sampling points into the second calculation unit 2 above to output a new I value. Please refer to the tenth aspect, the present invention combines the above-mentioned sampling surface calculation unit 4 with the first calculation unit 1 of the fourth circle, and obtains the average value as a preferred combination embodiment, as described above. In the present invention, a pixel is read. 15 The comparator 41 of the fetching operation unit 4 outputs a fetching multiple, and the sampling sticky number comparator 43 outputs an end sampling multiple. At this time, the first calculation The counter 12 of the unit 1 receives the sampling signal output from the upper comparator 41 and accumulates "1". The counter 12 is a counter that counts from 2 to 2 and starts counting from 0 again. Its output is> 0. , * 1〃, or > 2〃 as a selection control 20 multiplying number to the multiplexer 13 to select the pixel R, G, or B to the accumulator 11 to accumulate to the accumulator 11 to accept the sampling sticky number comparator described above At the end of the 43 rounds, take the double. Then, the accumulator 11 outputs the accumulative value of I to the second calculation unit 2, and executes the calculation of dividing the accumulative value of I by the number of sampling stickies. Similarly, __page 14_ This paper scale is easy to use China National Standard (CNS) ΑΊ Specifications (210X297 mm) I.-1 ------------ Installation ------ Order ------ \ i '(· Please first (Please read the notes on the back and fill in this page) A7 _B7_ printed by the Male Workers Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the Invention (/ 2) 1 It is worth mentioning that when the number of sampling sticks is set to the power of two, The divider is not needed to perform the division. As long as the accumulated value of I is shifted to the left by a few bits, the division can be completed, which can save the cost on the hard disk. The rotation of the second calculation unit 2 is the current I average value of the color image frame. 5 If the contrast of the static color image is strengthened, the contrast enhancement unit 3 will read the R and G of the original color image. , B, and the average value of I of the second calculation unit 2 are compared and enhanced, and then sent to the indicator. In this preferred embodiment, the contrast-enhancing lotus calculation unit 3 is shown in the eleventh embodiment. It includes three fi difference calculators 30, which respectively accept the R, G, and B values of the above-mentioned image data, and a total of 10. The same average value of I is accepted to output the difference values of the new I values of R, G, and B respectively; the three-value contrast enhanced gain calculator 31 is connected to the three-child difference calculator 30, respectively, to convert the difference Zoom in; and the triplet adder 32, which is connected to the above three-value contrast enhancement gain calculator 31, and jointly accepts the new I value to add the amplified difference back to the original subtracted new I value to obtain R '15, G ', B' values are the pixels that have been enhanced by contrast. In addition, when the above-mentioned contrast enhancement method is directly applied to a dynamic image, the difficulty encountered is that the generation time of the I average value (the new I value) of the image has a full delay compared to the wish time of the image. That is, unless there are additional temporary storage components, when the average I value of an image is calculated as 20, the color image is ready to be displayed, so the contrast enhancement of the color image cannot be as static image. Use the average value of I to do the lotus calculation. Therefore, when contrast enhancement of dynamic color images is performed, please refer to the twelfth circle. The present invention further includes a second register 24 and a weight multiplying and adding unit 25 in the second calculation unit 2. The second register 24 is connected to the level of the second calculation unit 2 _ page 15 _ The paper size is in accordance with the Chinese National Standard (CNS) A4 specification (210X297 mm)-! — ^ 1-*-I III-I-1-H II. {N (t read the notes on the back first and fill in this page) Printed by Shelley Consumer Cooperative, China Standards Bureau, Ministry of Economic Affairs • A7 _______B7 ______ V. Description of Invention (/ 3) 1 Mean The calculator 22 is used to temporarily store the average I values of the first few films. Then the weighted multiplication and addition unit 25 multiplies these average values by the appropriate weights and adds them to the second calculation unit. The register 23 of 2 is used as the I average value of the next color image to bb enhancement, and the first few images mentioned above can be adjusted to determine the I average value from the previous 2, 4, 8 or ---- 6 multipliers and weights of color images. .... 一.-&Quot; _Yes, in addition to the contrast enhancement and the correction of the brightness I value of the HSI color space, the processed color image is quite interesting in terms of brightness and color saturation. , Indeed, the color image after the decompression of the day and day, the color is dark 10 ~ __ sticky release, and the sampling method among them makes this hair '— one. One' In addition, in the comparison of the above k In the preferred embodiment, the decompressed image data are all described in RGB color space, and each color space is only a conversion of a conventional value. Therefore, the brightness I value of the HSI color space used in the present invention is The median or average value can also be used for contrast enhancement such as 15 YCbCr. In summary, the method for enhancing the contrast of color images of the present invention and the road device thereof can indeed be connected to the intended purpose of use and the significant improvement of efficacy through the exposure of the above technology. There has not been the same design public use before. The newness, practicability, and advancement of the commandment invention patent20 and the industrial use value of the various elements, love to file a profit claim in accordance with the law. However, the above are only the preferred embodiments of the present invention. Anyone who is familiar with this technology and borrows according to the spirit of the present invention should still be included in the patent of this case. Page 16 ^ Paper size is applicable to China National Standard (CNS) A4 (210X297 mm) (Please read the notes on the back before filling this page) »n ^ i Ik.— · In.,

*1T* 1T

Claims

15 經濟部中央棣準局貞工消费合作社印製 20 申請專利範圍 A8 B8 C8 D8 1· 一種彩色彩像對比加強之友法，步思包括： a) 計算解壓缠後彩色影$之毎餹像素資料在HSI色彩空間 1對應之I值· b) 計算上述所有I值.JU輪出一新I值；及 C)利用上逑新\值對ih加強解歷缩後彩色彩儋的每β 像素資料。 2.如申請專利範園第1項所述之彩色影像對比加強之方法，其中a)及c)步«中之像素責料為RGB色彩空間資料。 •3.如申請專利範園第2項所述之彩色影像辑比加強之方法，其中在a)步*偽以一加法器將同一像素資料之R 、G、B值枏加後，再以一除法器除以3,而逋成.1/3( R + G+B)之對慝I值。 4. 如申請專利範園第2項所述之彩色彩像對比加強之方法，其中在a)步顧傈以一加法器將同一像索資料之R 、G、B值相加後，再以一計算器，以遍近法計算1/4 + •1/16 + 1/64---- = 1/3 ,而逹成 1/3(R+G+B)之對醮I值。 5. 如申請專利範圃第2項所述之彩色彩像對比加強之方 ✓ 法，其中在a)步《你将連顧的三f像素中之一鶴像素取其R值，一値银素取其G值，ΐ另一β像素取其B 值，而相加成R+G + B,而建成毎一像素為1/3(R + G + B)之對應I值。 6. 如申請專利範園第1項所述之彩色影像對比加強之方第17頁 (请先閲讀背面之注意事項再填寫本頁)15 Printed by Zhengong Consumer Cooperative of the Central Ministry of Economic Affairs of the People's Republic of China 20 Application scope of patents A8 B8 C8 D8 1 · A method to enhance the contrast of color images, including: a) Calculate the color pixels of the color image after decompression Corresponding I values of the data in HSI color space 1 b) Calculate all the above I values. JU rounds out a new I value; and C) Use the previous new value to strengthen ih to decompress each β pixel of the color screen data. 2. The method for enhancing the contrast of the color image as described in item 1 of the patent application park, where the pixels in steps a) and c) are to be RGB color space data. • 3. The method for enhancing the color image ratio as described in item 2 of the patent application park, wherein in step a) *, the R, G, and B values of the same pixel data are pseudo-added by an adder, and then A divider divides by 3 to form a pair I value of .1 / 3 (R + G + B). 4. The method for enhancing the contrast of color images as described in item 2 of the patent application park, where in step a) Gu Zheng adds the R, G, and B values of the same image data with an adder, and then A calculator calculates 1/4 + • 1/16 + 1/64 ---- = 1/3 by the method of traversal, and 逹 becomes the I value of 1/3 (R + G + B). 5. The method for enhancing the contrast of color images as described in item 2 of the patent application, where in step a) "you will take one of the three f pixels of the consecutive f cranes to take the R value, one silver The prime takes its G value, the other β pixel takes its B value, and adds up to R + G + B to create a corresponding I value of 1/3 (R + G + B) for one pixel. 6. The method for enhancing the contrast of color images as described in item 1 of the patent application park. Page 17 (Please read the precautions on the back before filling this page)

本纸張尺度逋用中國國家捸準（CNS ) A4规格（210X297公釐） A8This paper uses China National Standard (CNS) A4 size (210X297 mm) A8

經濟部中央揉準局員工消费合作社印裝 '申請專利範園法，其中a)及〇步驟中之儋素資料為YCbCr色彩空間資料。 >·如申請專利範圃第1項所述之彩色彩像對比加強之方 /法，其中b)及c)步*中之新I值為一~中值 5 β.如申誚專利範圃第7項所述之彩色彩像對比加強之方法，其中該4值的取得步*包括： d)統計不间J種之毎磨I值的像素數目；及 1 Ο再將不同之I值由小、到大累加各癱I值之像素數目 ! ，直至累加到某I值之像素數目後超過所有像鬵數 10 I 目之一半，則該I值即為中值。 ‘ 一9.如申請專利範鼷第1項所述之彩色影儋對比加強之方法，其中b)及c)步*中之新I值為一平均值。 • · ·— 10·如申請專利範園第9項所述之彩色彩像對比加強之方法，其中該平均值的取得步《包括： ____ 15 _ f)將所有像素之I值累加；及 S)將累加後之I值除以所有像素數目，所得商值邸為 « 平均值。 11. 如申請專利範鼷第1項所述乏彩色影像對比加強之方法，其中a)步鼸更包括一取樣步班，以取櫬該解壓缩 20 後彩色彩像之部份像素，再計算ΪΓ部份像素之每傾像 3)Γ資料在HSI色彩空間+對蠹之I值。 12. 如申餺專利範圃第11項所述之彩色彩像對比加強之方法，其中該取樣步蹶包括： h)決定一計數最大值，使其乘以取樣率（取檬黏數目 % * _第18頁__ 本纸張尺度逍用中Η國家梂準（CNS ) A4規格（2丨0><297公釐） ~ m I- - ih ...... iu- _ - Is —衣- I— I —I— - I - -- (请先閲讀背*之注意事項再填寫本頁) 15 經濟部中央棣準局工消費合作社印«. 20 申請專利範圍 A8 B8 C8 D8 /所有像素數目）後得到一大於零之整數之取樣爹、數； i)毎黷取—餹嫌素，即累加上述取樣參數；當比較某黏像素之取漾參數累加值大於上述計數最大值時，邸取樣該^像素；及 ,ίο将j)步a之取樣參數累加值滅去計數最*值，，所得 i餘數充作累加值起始黏再重覆上述b)、i)、j)步R ，直至最後一鮪取櫬黏數目取到為止。 U·如申謫専利範鼷第1項所述之彩色影像對比加強之方法，其中 <：)步a中更包括一權數乘加步骤： 1)將該新I值舆先前幾張影像的新I值各乘以適當的權數後相加，以對比加強下一張彩色彩像的每值像素資料，達到動應影像鲟比加強目的。 14. 如申讅專利範《第 1、2、3、4、5、6、7、8、9、10 、11、12或13項所述之彩色彩嫌對比加強之方法，其對比加強之方法步*包括： -~ )取IB像素資料舆新I值之差值放大；及 η)将放大後之差值再加回原減去之新I值。 15. 了種彩色彩像對比加強之霣路裝置，包括：一第一計算單元，以計算解壓縮後彩色影像之毎餹供索資料在^151^彩空間中對應之I值； =第二計算單元，以計算上逑所有I值，以输出一新 I、 iis;及一澍比加味》1云，接受上述新1值，以将解歷缠後彩 ...、 ··. 第19頁本纸張尺度逋用中國國家揉率（CNS ) A4规格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) -.-IT 娌濟部中央梂準局負工消費合作社印裝 A8 B8 C8 D8 7、申請專利範圍 1 色彩像的每餹像素資料作對比加強者。 I r .一· 16· $申誚専利範園第15項所述之彩色彩像對比加強之霣 .路裝置，其中該像素資料為RGB色彩空間賫料。 17 ·如申請專利範圍第16項所述之彩色彩像對比加強之霣 5 路装置，其中該寒計霣軍元包插：一加法器，将同一像素賫料之R、G、B值相加；及一除法器，將上述R + G + B除以3,而翰出1值》 it 申請専利範園第16項所逑之彩色彩像對比加強之《 t 路華置，其中該第一計算單元包括： 10 —加法器，将同一1»素資料之R、G、B值相加；及，了計算器，以（1/4+1/1S+1/64....)之駕算來華近上述R + G + B值之你數。 19 —如申請專利範園第16項所述之彩色彩像對比加強之霣路裝置，其中該第一計算軍元像包括： 15 .一每次數到2又會再從0鬩始數之計數器，以輪出0 、1、2三縝控制倍號且由第一控制倍號擷取三梅連鑛像素中第一瘺像素的R值，由第二控制倍號擷取第二鵪像素的G值，及由第三控制倍«攞取第三德像素的B值：及 20 —加法器，将上述R、G、B三值相加。 20*如申諳專利範醞第15項所述之彩色影像對比加兼之霣 .路裝置，其中該像素資料為YCbCr色彩空間資料。 21.如申請專利範園第15項所述之彩色彩像對比加強之霣路装置，其中汴拓中值。第20頁本紙張逋用中國國家梂车（CNS ) A4規格（210Χ297公釐） (请先閲讀背面之注意事項再填寫本頁) 訂經濟部中央揉率局員工消费合作社印装 A8 B8 C8 -------- T'申請專利範圍 1 22·如申誚專利範团第21項所述之彩色彩供對比加強之霣路裝置，其中該第二計算單元包括：一中值計算器，/¾统計像素在HSI色彩空两所辑應的 I值中毎镛不同I值的像素數目；再将不同之I值 5 由小到大累加各值I值之像索數目，直至累加到某 .1應之像素歎目後超過所有像素數目之一半，則該 1值即為中值；及第一暫存器，用來皤存上述由倌」 23. -如申請專利範園第22項所述之彩色影像對比加強之霄 10 路装置，其中該第二計篦單元内更包括一第二暫存器及一權數乘加單兀，該5二暫存器接於該第二計算單元之平均值計算器，以用來轚存前幾驀彩儋的ΙΨ值，然後再經權數乘加單元將逭些I中值乘上鏟霣的榧 p後枇加後皤存於I二計算單元之第一暫存器，以做為下一張影像對比加強的I中值 24. 如申_專利範鼸第15項所述之彩色彩攀對比加強之霣路裝置，其中該新I值為一平均值β 25r如申請専利範圏第24項所述乏彩色f像f[比加強之霣路裝置，其中該第二計算單元包括： 20 •平均值計算器，以将wii索之I值累加除以所有像素數目，以輪出所有供素之平均I值；及 * 一第一暫存器，用來鐮存上述之平值。 26.如申讅專利範園第25項所述之彩色挺w對比加強之霄 ,路裝置，其中該第二計算單元内更包括一第二暫存器 ____第 21 頁_;_ 本紙張尺度逋用t國國家椹準（CNS > Α4规格（210x297公釐) (請先閱讀背面之注意事項再填寫本頁) 订經濟部中央揉率局員工消費合作社印袈 A8 B8 C8 D8 六、申請專利範圍 1 及一權數乘加單元，該第二暫存器接於該第二計算單元之平均值計算器，以角來暫存前幾張彩像的I平均值，然後再經權數乘加單元將谊些I平均值乘上逋當、狗權數後相加後皤存於第二計算單元之第一暫存器， V — 5 以做為下一張彩像對比加強的I平均值 27>如申請專利範圍第15項所述之彩色彩像對比加強之霣路装置，更包括一取樣麵算單元，以取樣該解睡缩後彩色影像之部份像索資料至上述第一計算單元。 28.如申請專利_圍第27項所述之彩色影像對比加強之《 10 、路裝置，其中該取樣蓮篇單元包括：一$三計算單元，該計算單元具有一累加器及一減法琴，其中該累加器用以在毎黷取一籲像素邸累加-Γ 大於零之整數，並輸出一累加值； 7比較器，内設一爹考j|與上述累加值比較，且當比 15 較某黏像素之累加值大於該參考值時，邸输出一取樣倍》至上述第一、第三計算單元，該第一計算單元即計算出該^黏《索之對應I值，且第三計Dei元霜丨Sr 之減法器即將該累加值滅去參考值，並自差值繼續累加取樣參數； 20 一 It梦器，毎接受一次比較器输出之取樣倍《即炙轫 ' 1 ,其累加俥邸為取樣點數目； r-" · ^ —取樣勘數比較器.該取樣鼬數比較器參考值則為一一...' …一預設之取樣黏數目，當上述計數器輪出之累加值等，、- 於取樣黏败目時邸輪出一結束取樣倍《至上述第一 <1 - _ _第22頁__ 本纸張尺度逋用中國國家揉準（CNS ) A4规格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) 訂經濟部中央標率局属工清费合作社印装 A8 B8 C8 D8 ~、申請專利範圍 1 計篇單元，停it取樣》之蓮算，且由該計、5軍 * 一一 \ 〜 i将所有取樣》之對*1值上述笋二計簞單元 "V以輪出一新I值者。像素至上述第計算單元，且輪出一控制倍*至上 5 述計算單元^該計算3^之滅法器邸将該累加值減云爹^值厂並自差值繼續累加； -一計數器，每接受一次比較器_出之控制倍號，即累、加丨，其累加值邸為取樣»數目；及一取樣黏數比較器，内^一總取《黏數值與上述取樣 10 黏數目比較，直至與取襻黏數目等於總取樣黏]R值即完成取樣。 ^ 29.如申誚專利範園第28項所述之彩色影像對比加強之霣路裝置，其中該總取嫌貼數值你設定為2的幕次方軀 0 15 30.如申請專利範園第15或16項所述之彩色彩像對比加強之霣路装置，其中該對比加強單元包括：三奮差值計算器，分別接受上迷镞素資料之R、G、B, '1 - --— * 值，及共同接受上述新ιΜ,以分別输出該R、G、 B輿新I值之|1值； 20 三鏹對比加強增益應算器，分別建接上述^ ^算罌，以將上述寒值Ίκ大及加法器，分別連接上述三籲對比加強增益蓮算器，及共同接受上述新I值，以将放大後之差值再加回原減去之新I值，得到新的R、G、B值者。第23頁本纸浪尺度逋用t國國家椹準（CNS ) A4規格（210x297公兼） (請先閱讀背面之注意事項再填寫本頁) >1TThe Central Government Bureau of the Ministry of Economic Affairs prints the 'Applicant Patent Park Law' for employees' cooperatives, where the elementary data in steps a) and 0 are YCbCr color space data. > · The method / method of strengthening the color image contrast as described in item 1 of the patent application, where the new I value in step b) and c) * is 1 ~ median 5 β. The method for enhancing the contrast of color images as described in item 7, wherein the step of obtaining the 4 values * includes: d) Counting the number of pixels of the I value of the honing I of the various J types; and 1 0 then different I values From small to large, the number of pixels of each I value is accumulated! Until the number of pixels added to a certain I value exceeds one and a half of all 10 I numbers, the I value is the median value. ‘A 9. The method for enhancing color contrast as described in item 1 of the patent application, wherein the new I value in steps b) and c) * is an average. • · 10 — The method for enhancing the contrast of color images as described in item 9 of the patent application park, wherein the step of obtaining the average value includes: __ 15 _ f) accumulate the I values of all pixels; and S ) Divide the accumulated I value by the number of all pixels, and the resulting quotient value is «average. 11. The method for enhancing the contrast of a lack of color image as described in item 1 of the patent application, wherein step a) further includes a sampling step to take a portion of the pixels of the decompressed color image and calculate Each tilt image of 像 Γ part of the pixel 3) Γ data in the HSI color space + the value of I. 12. The method for enhancing the contrast of color images as described in item 11 of the Shen Fan Patent Garden, wherein the sampling steps include: h) determining a maximum value for counting, multiplying it by the sampling rate (number of lemon sticks% * _ 第 18__ This paper size is not applicable to the Chinese National Standard (CNS) A4 specification (2 丨 0 > < 297 mm) ~ m I--ih ...... iu- _-Is — 衣-I— I —I—-I--(Please read the notes on the back * before filling out this page) 15 Printed by the Central Consumers' Bureau of the Ministry of Economic Affairs and Industrial Cooperatives «. 20 Scope of patent application A8 B8 C8 D8 / All pixels) to obtain a sampling number of integers greater than zero; i) fetching-fetching pixels, accumulating the above sampling parameters; when comparing the cumulative value of the picking parameters of a sticky pixel greater than the above counting maximum Then, sample the ^ pixels; and, count the cumulative value of the sampling parameter of step a) in step a) to count the highest value, and use the remainder of i as the cumulative value to start sticking and repeat the above b), i), j). Step R until the last number of sticks is obtained. U. The method for enhancing the contrast of color images as described in item 1 of Shen Lili Fan, wherein < :) step a further includes a weight multiplication and addition step: 1) the new I value is compared with the previous several images Multiply the new I value by an appropriate weight and add them to compare and strengthen the pixel data of each value of the next color image, to enhance the dynamic image ratio. 14. As for the method for enhancing the contrast of color chromatic aberrations as described in the "1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 or 13" patent application of the patent, Method steps * include:-~) taking the difference between the IB pixel data and the new I value to enlarge; and η) adding the enlarged difference back to the original subtracted new I value. 15. A kind of road device for enhancing the contrast of color and color images, including: a first calculation unit for calculating the I value corresponding to the data of the uncompressed color image in the ^ 151 ^ color space; = second A calculation unit to calculate all the I values on the last line to output a new I, iis; and a better than 1 flavor, accepting the new 1 value above, to entangle the solution ..., ... Page size of paper: China National Kneading Rate (CNS) A4 size (210X297 mm) (Please read the precautions on the back before filling in this page) -.- IT Print Install A8 B8 C8 D8 7. Patent application scope 1 Each pixel of color image is used for contrast enhancement. Ir.16. $ Shenlili Fanyuan Item 15 The enhanced color image contrast enhancement method. The pixel data is RGB color space data. 17 · The 5-channel device with enhanced color contrast as described in item 16 of the scope of the patent application, where the cold plan military unit inserts: An adder that compares the R, G, and B values of the same pixel data. Add; and a divider that divides the above R + G + B by 3, and the value of 1 is obtained. It applies for the "T Road Hua Zhi," which is used to enhance the contrast of the color images in Item 16 of Li Fan Yuan. A calculation unit includes: 10 —adder, which adds the R, G, and B values of the same 1 »prime data; and, a calculator to (1/4 + 1 / 1S + 1/64 ....) The number of drivers who came to China near the above-mentioned R + G + B value. 19 —The color road image enhancement device of the Kushiro device as described in Item 16 of the patent application park, wherein the first calculated military image includes: 15. A counter that counts from 0 to 2 each time The R value of the first fistula pixel in the Sanmeilian Mine pixel is retrieved by the three control ratios of 0, 1, 2 in turn, and the second quaternary pixel is retrieved by the second control ratio. G value, and the third control pixel «take the B value of the third German pixel: and 20-adder, add the above three values of R, G, B. 20 * The color image comparison described in item 15 of the application for patent application plus the road device, where the pixel data is YCbCr color space data. 21. A color road device with enhanced color contrast as described in item 15 of the patent application park, where the median value is extended. Page 20 This paper uses the Chinese National Car (CNS) A4 size (210 × 297 mm) (Please read the precautions on the back before filling out this page) Order printed by the Ministry of Economic Affairs Central Consumer Affairs Bureau employee consumer cooperatives A8 B8 C8- ------- T 'application for patent scope 1 22 · The color road contrast device with enhanced color contrast as described in item 21 of the Shenyang Patent Fan Group, where the second calculation unit includes: a median calculator / ¾ Counts the number of pixels with different I values in the I values of the HSI color space. The different I values 5 are accumulated from small to large and the number of pixels of each I value is accumulated until it is added to The pixel value of a certain .1 should exceed one and a half of all pixels after sighing, then the 1 value will be the median value; and the first register is used to store the above-mentioned reason. The 10-channel device with enhanced color image contrast described in the above item, wherein the second counting unit further includes a second register and a weight multiply-add unit, and the 52 register is connected to the second calculation Unit average calculator, used to save the ΙΨ values of the first few colors, and then weighted The adding unit multiplies some of the median I by the 榧 p of the shovel, adds it, and stores it in the first register of the computing unit I, which serves as the median I of the next image enhancement 24. Rushen _The color road climbing device described in the item 15 of the patent fan, the color road climbing device is enhanced, wherein the new I value is an average value β 25r. Kushiro device, wherein the second calculation unit includes: 20 • an average calculator to accumulate the I value of the Wii cable by the number of all pixels to round out the average I value of all suppliers; and * a first time Register, used to save the above parity. 26. The color contrast and enhancement device described in item 25 of the Shenyang Patent Fanyuan, in which the second calculation unit further includes a second register __page 21 _; _ this Paper size: national standard (CNS > Α4 size (210x297 mm) (Please read the precautions on the back before filling out this page) Order the stamp of A8 B8 C8 D8 of the Consumer Cooperatives of the Central Rubbing Bureau of the Ministry of Economic Affairs 1. The scope of patent application 1 and a weight multiplication and addition unit. The second register is connected to the average calculator of the second calculation unit, and temporarily stores the average I value of the previous color images by the angle, and then passes the weight. The multiply-add unit multiplies the average value of these I values, the dog weights are added, and then they are stored in the first register of the second calculation unit. V-5 is used as the enhanced I-average of the next color image. A value of 27 > The Kushiro device with enhanced color contrast as described in item 15 of the scope of the patent application, further includes a sampling surface calculation unit to sample part of the image data of the color image after the sleep and shrink to the first Calculation unit 28. The color image contrast plus as described in the application for patent 27 The "10-channel device", in which the sampling unit includes: a $ 3 calculation unit, the calculation unit has an accumulator and a subtraction piano, where the accumulator is used to accumulate -Γ An integer greater than zero, and output an accumulated value; 7 comparator, which has a built-in comparison j | compared with the above accumulated value, and when the accumulated value of a certain viscous pixel is greater than the reference value than 15, the sampling output is doubled ”To the above-mentioned first and third calculation units, the first calculation unit calculates the corresponding I value of the ^ sticky cable, and the subtractor of the third count of Dei Yuanshuang 丨 Sr will destroy the accumulated value to the reference value, And the self-difference value continues to accumulate the sampling parameters; 20-It dreamer, I accept the sampling times of the comparator output "that is, 轫轫 1", and the accumulated number is the number of sampling points; r- " · ^ —Sampling survey number Comparator. The reference value of the sampling ferret number comparator is one by one ... '… a preset number of sampling sticks, when the accumulated value of the above-mentioned counter rolls out, etc. End of sampling times "to the first < 1-_ _ page 22 __ This paper size is in accordance with China National Standard (CNS) A4 (210X297 mm) (Please read the precautions on the back before filling this page) Order printed by the Central Standards Bureau of the Ministry of Economic Affairs, which is a labor clearing cooperative, printed A8 B8 C8 D8 ~, patent application scope 1 counting unit, stop it sampling "of the lotus calculation, and by the count, 5 army * one \ \ i i will sample all of the" * 1 value of the above mentioned two counting units "" V is calculated by rotating a new value of I. Pixels to the above-mentioned calculation unit, and a control multiple * is rotated above the above-mentioned calculation unit ^ The calculation method of the calculation method 3 ^ will subtract the accumulated value from the Yunda value factory and The difference continues to accumulate;-a counter, each time it receives the control multiple number from the comparator, that is, accumulate, add, the accumulated value is the number of samples »; and a sample viscosity comparator, the total of" ^ The viscosity value is compared with the above-mentioned sampling number of 10 sticks, and the sampling is completed until the number of sticking sticks equals the total sampling stick] R value. ^ 29. The road device for enhanced color image contrast as described in item 28 of the Shen Fan Patent Park, in which the total number of suspected post values you set to 2 is 0 15 30. 15 or 16 color road image contrast enhancement roadway device, wherein the contrast enhancement unit includes: a three-fen difference calculator, which accepts R, G, B, '1-- — * Value, and accept the new ιM mentioned above to output the | 1 value of the new I values of R, G, and B respectively; The cold value Ίκ and the adder are respectively connected to the three contrast enhancement gain calculators, and jointly accept the new I value to add the amplified difference back to the original subtracted new I value to obtain a new value. R, G, B value. P.23 This paper uses the national standard (CNS) A4 size of the paper (210x297) (Please read the precautions on the back before filling this page) > 1T