WO2018028237A1 - 图像处理装置与投影*** - Google Patents

图像处理装置与投影*** Download PDF

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Publication number
WO2018028237A1
WO2018028237A1 PCT/CN2017/081259 CN2017081259W WO2018028237A1 WO 2018028237 A1 WO2018028237 A1 WO 2018028237A1 CN 2017081259 W CN2017081259 W CN 2017081259W WO 2018028237 A1 WO2018028237 A1 WO 2018028237A1
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WIPO (PCT)
Prior art keywords
color
grayscale value
value
adjustment
image processing
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Application number
PCT/CN2017/081259
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English (en)
French (fr)
Inventor
郭祖强
张宝英
李屹
Original Assignee
深圳市光峰光电技术有限公司
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Publication of WO2018028237A1 publication Critical patent/WO2018028237A1/zh

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut

Definitions

  • the present invention relates to the field of projection technologies, and in particular, to an image processing apparatus and a projection system.
  • the existing projection system generally includes a light emitting device, a light valve and an image processing device, the light emitting device emits three colors of light of red, green and blue, and the image processing device acquires input image data and controls the light valve to receive the three Color light and modulate the image based on the input image data.
  • the light-emitting device often has a problem of insufficient color light (such as insufficient red light) due to poor phosphor efficiency and aging, etc., affecting the projection screen effect of the projection system.
  • a projection system including the aforementioned image processing apparatus is provided.
  • An image processing apparatus configured to acquire image data of an image to be displayed, the image data comprising a grayscale value of a first color of a pixel of the image to be displayed, and at least one type different from the first color a grayscale value of the two colors, the collection area of the first color in the image to be displayed is obtained according to the image data, and the grayscale value of the first color of the pixel in the collection area is higher than a first preset a grayscale value, and an area of the collection area is greater than a predetermined area, and a color grayscale value of a pixel of the peripheral area of the collection area in the image to be displayed is adjusted to form adjusted image data, so that the The ratio of the grayscale value of the first color after the pixel point adjustment of the peripheral region to the grayscale value of the at least one second color is smaller than that before the adjustment.
  • the adjusted image data is used to output to a light valve to modulate an image.
  • the image processing apparatus adjusts a grayscale value of the first color corresponding to a pixel point in the peripheral area to a first color adjustment grayscale value, wherein the first color adjustment grayscale value is smaller than the first a grayscale value of a color, and the first color adjustment grayscale value is a difference between a grayscale value of the first color and a first reference grayscale value.
  • the image processing device gradually adjusts the grayscale value of the first color for the peripheral region in a direction away from the collection region, and the first reference grayscale value is in a direction away from the collection region Gradually become smaller.
  • the first reference grayscale value of each pixel point of the peripheral region is equal.
  • the first reference gray scale value is a product of an average value of the pre-adjustment gray scale values corresponding to the first color and an adjustment coefficient, and the adjustment coefficient is greater than or equal to 1/4 and less than or equal to 1/2.
  • the image processing apparatus adjusts the at least one second color grayscale value corresponding to a pixel point in the peripheral area to a second color adjustment grayscale value, where an original grayscale value of the second color is greater than The at least one second color grayscale value, and the second color adjustment grayscale value is a sum of an original grayscale value of the at least one second color and a second reference grayscale value.
  • the second reference gray scale value gradually becomes smaller in a direction away from the collection area.
  • the second reference grayscale values of each pixel point of the peripheral region are equal.
  • the second reference gray scale value is a product of an average value of the at least one second color pre-adjustment gray scale value and an adjustment coefficient, and the adjustment coefficient is greater than or equal to 1/4 and less than or equal to 1/2 .
  • the at least one The highest grayscale value of the second color is used as the second color adjustment grayscale value.
  • the first color is red and the at least one second color is green or blue.
  • the peripheral region abuts and surrounds the outside of the collection region, and the outer contour of the peripheral region coincides with the contour of the outer side of the collection region.
  • a projection system comprising the foregoing image processing device and a light emitting device and a light valve, wherein the light emitting device is configured to emit the light of the first color and the at least one second color, and the light valve is used for
  • the adjusted grayscale value of the image processing device modulates the light emitted by the light emitting device to form a display image.
  • the image processing apparatus adjusts a grayscale value of a pixel point of a peripheral area of the collection area such that an average value of the first color adjustment grayscale value of each pixel point of the peripheral area is
  • the ratio between the average values of the second color adjustment gray scale values is decreased, and further the first color brightness of the peripheral region of the collection region is decreased or the second color brightness is increased, and the collection region is according to visual characteristics of the human eye.
  • the color contrast with the peripheral area is increased, and the user will obtain a brighter visual effect of the first color of the collection area, and improve the problem that the first color light of the original light-emitting device is insufficient to affect the projection picture effect of the projection system. .
  • FIG. 1 is a schematic view of a projection system in a first embodiment of the present invention.
  • FIG. 2 is a schematic plan view showing the color wheel of the color wheel shown in FIG. 1.
  • FIG. 3 is a schematic diagram of a frame of input image to be displayed.
  • FIG. 4 is a schematic diagram of color adjustment compensation corresponding to the corresponding red pixel shown in FIG. 3.
  • FIG. 4 is a schematic diagram of color adjustment compensation corresponding to the corresponding red pixel shown in FIG. 3.
  • Projection system 100 Illuminating device 10 light source 11 Color wheel 13 Homogenizer 15 Light valve 20 Image processing device 30 Control module 31 Image parsing module 35 Projection lens 40 Input image a First sub-frame image A1 Second sub-frame image A2 Third sub-frame image A3 Pooling area 91 Peripheral area 93
  • FIG. 1 is a schematic diagram of a projection system 100 according to a first embodiment of the present invention.
  • Embodiments of the present invention provide a projection system 100 that includes a light emitting device 10, a light valve 20, an image processing device 30, and a projection lens 40.
  • the illuminating device 10 is configured to emit light and provide display light, wherein the illuminating device 10 provides at least a light of a first color and at least one light of a second color.
  • the light valve 20 is for selectively providing light to the projection lens 40 for image display under the control of the image processing apparatus 30.
  • the projection system 100 further includes necessary or unnecessary structural features such as a projection screen, which are not described herein.
  • the light-emitting device 10 emits light of three colors of the first color, the second color, and the third color.
  • the light emitting device 10 includes a light source 11, a color wheel 13, and a light homogenizing device 15.
  • the light source 11 is used to generate an excitation light.
  • the excitation light is ultraviolet light.
  • the light source 11 can be a light emitting diode, a laser diode, or other solid state light source.
  • the color wheel 13 is for emitting light different from the wavelength of the light source 11 according to the excitation of the light emitted from the light source 11.
  • the light homogenizing device 15 is for receiving the light emitted from the color wheel 13, thereby homogenizing the light.
  • FIG. 2 is a schematic plan view of the color wheel 13 of FIG. 1 .
  • the color wheel 13 carries a wavelength converting material.
  • the color wheel 13 is rotated by driving of a driving device (not shown).
  • the color wheel 13 is a substantially disk-shaped color wheel structure including a first segment 131, a second segment 133, and a third segment 135.
  • the three segments are fan-shaped structures having the same area. .
  • the three segments on the color wheel 13 are respectively provided with different wavelength conversion materials, wherein the first segment 131 can convert the incident light into the first color light; the second segment 133 can convert the incident light into the second color. Light; third segment 135 converts incident light into a third color of light.
  • the wavelength converting material may be a phosphor, a quantum dot material, or other material that is capable of converting excitation light into a suitable color.
  • the first color light is red light
  • the second color light is green light
  • the third color light is blue light
  • the first color light wavelength conversion material layer is a red phosphor
  • the second color light wavelength conversion material layer is a green phosphor
  • the third color light wavelength conversion material layer is a blue phosphor.
  • the third segment 133 corresponding to the color wheel 13 may not need to be provided with a wavelength-converted phosphor, and only needs to be provided with a scattering material.
  • the blue light emitted by the third segment of the color wheel 13 is relatively uniform, or the third segment 133 is directly disposed as a light transmitting layer, thereby causing the light emitted from the light source 11.
  • the light valve 20 is located in a transmission path of the light emitted from the color wheel 13.
  • the light emitted from the color wheel 13 can be incident on the light valve 20.
  • the first color light, the second color light, and the third color light modulated by the light valve 20 reach the projection lens to project a display image.
  • the light valve 20 can be a liquid crystal display module (Liquid Crystal Display, LCD), liquid crystal display module and CMOS integrated circuit combined with reflective display module (Liquid Crystal on Silicon, LCoS), Digital Micromirror Device (DMD), etc.
  • the image processing device 30 includes a control module 31 and an image analysis module 35.
  • the control module 31 is configured to turn on or off the light source 11, drive and control the movement of the color wheel 13, and image modulation.
  • the image parsing module 35 receives the image signal and performs parsing to obtain image data corresponding to each pixel in each image to be displayed, wherein the image data includes each pixel in the image to be displayed. Corresponding grayscale values for each color. Further, the image analysis module 35 further performs modulation processing on the image data according to an output signal of the control module 31.
  • the image analysis module 35 acquires image data, the image data includes a grayscale value of a first color of a pixel of the image to be displayed, and at least one second color different from the first color. Grayscale value.
  • the image data includes a first color of each pixel of the image, and a grayscale value corresponding to the second color and the third color.
  • FIG. 3 is a schematic diagram of a frame input image to be displayed.
  • the input image a to be displayed for each frame includes a first subframe image a1, a second subframe image a2, and a third subframe image a3 of different colors.
  • the first subframe image a1 corresponds to a red pixel of a first color
  • the second subframe image a2 corresponds to a green pixel of a second color
  • the third subframe image a3 corresponds to a blue pixel of a third color.
  • first subframe image a1, the second subframe image a2, and the third subframe image a3 are combined to form an input image a to be displayed, and color display is realized, and at the same time, the three subframe images are respectively in time sequence. Transfer to the projection lens 40.
  • FIG. 4 is a schematic diagram of adjustment compensation for the gray scale corresponding to the first color pixel shown in FIG. 3 .
  • a collection area 91 is defined corresponding to the input image a, and the first color original gray scale value corresponding to the continuous pixel points of the input image is higher than a first preset gray scale and the area occupied by the consecutive pixel points is larger than A predetermined area, in other words, the grayscale value of the corresponding collection area 91 in the first subframe image a1 is higher than the first preset gray level.
  • the collection area 91 corresponds to the same coordinate position of the first subframe image a1, the second subframe image a2, and the third subframe image a3 in the three subframe images. It should be noted that in the present embodiment, the coordinate position of the collection region 91 in the input image a is only a schematic representation. In another embodiment of the present invention, the collection region 91 may be located at any position of the input image a, and is not limited thereto. At the same time, the number of the collection areas 91 is not limited to one, and the number may be two, three or other quantities.
  • a region defining abutting and annularly enclosing the collection region 91 is a peripheral region 93, and an outer contour of the peripheral region 93 coincides with a contour of the outer side of the collection region 91, that is, an outer contour of the peripheral region 93
  • the outline of the outer side of the collection area 91 has the same shape and different size. In other words, the outline of the outer side of the collection area 91 is formed such that the outer contour of the outer peripheral area 93 is enlarged in proportion.
  • the peripheral region 93 may surround the collection region 91 without being closed.
  • the image parsing module 35 performs parsing according to the input image data, so as to determine whether the aggregation region 91 satisfies the first color, and the original grayscale value is higher than the first preset grayscale and the area occupied by the continuous pixel is larger than Predicted area.
  • the image analysis module 35 outputs a first adjustment signal to the control module 31, and the control module 31 pairs the second and third colors in the peripheral area 93 according to the first adjustment signal.
  • the original grayscale value is adjusted to reduce the luminance ratio between the first color and the second color and the third color in the peripheral region 93, for example, to decrease the grayscale value of the first color, or to increase the second color and the third color.
  • the gray scale value otherwise, when the collection area 91 does not satisfy the foregoing conditions, the control module 31 and the image analysis module 35 do not need the original gray scale of the first color, the second color, and the third color in the peripheral area 93. The value is adjusted.
  • the ratio between the average of the original grayscale values of the first color and the average of the other grayscale values of the second color or the third color is defined as the first initial value.
  • the first color original grayscale value of the at least one pixel corresponding to the peripheral region 93 is adjusted to the first color adjustment grayscale value, so that the first color of each pixel of the peripheral region 93 adjusts the grayscale value.
  • the ratio between the average value of the second color and the average value of the second color adjustment grayscale value is the first adjustment value.
  • the first color adjustment grayscale value is smaller than the first color original grayscale value, and the first color adjustment value may be a difference between the first color original grayscale value and a first reference grayscale value, wherein the first A reference gray scale value is a positive integer. Therefore, the adjusted grayscale value of the first color in the peripheral area 93 is smaller than the grayscale value before the adjustment, so that the first color in the peripheral area 93 is compared with the second color and the third color.
  • the brightness ratio is relatively reduced, the brightness value of the first color in the collection area 91 is increased with respect to the peripheral area 93 to achieve visual compensation of the first color to the collection area 91, thereby improving the visual effect of the first color.
  • the first reference grayscale value gradually becomes smaller in a direction away from the collecting region 91, so that the first color visual effect is smoothly compensated for the transition.
  • the corresponding first reference grayscale values in the peripheral area 93 are equal, and the size of the first reference grayscale value may be selected according to an actual adjustment effect of the image, where the first reference grayscale value is the first 1/2, 1/3, or 1/4 of the average grayscale value of the color original grayscale value.
  • the first reference grayscale value is the product of the average value Y1 of the first color original grayscale value and an adjustment coefficient, the adjustment coefficient It is 1/4 or more and 1/2 or less. Since the corresponding first reference grayscale values in the peripheral area 93 are equal, the data processing complexity of the image parsing module 35 can be effectively reduced.
  • the second color original grayscale value of the at least one pixel corresponding to the peripheral region 93 is adjusted to the second color adjustment grayscale value, so that each of the peripheral regions 93
  • the ratio between the average of the first color adjustment grayscale value of the pixel and the average of the second color adjustment grayscale value is the first adjustment value.
  • the second color adjustment grayscale value is greater than the second color original grayscale value, and the second color adjustment value may be a sum of the second color original grayscale value and a second reference grayscale value. It can be understood that the second reference gray scale value is also a positive integer.
  • the grayscale value corresponding to the adjusted second color in the peripheral area 93 is larger than the grayscale value before the adjustment, so that the brightness of the first color and the second color ratio in the peripheral area 93 are relatively decreased. Then, the brightness value of the first color in the collection area 91 is increased relative to the peripheral area 93 to achieve visual compensation of the first color to the collection area 91, and to improve the visual effect of the first color.
  • the second reference grayscale value gradually becomes smaller in a direction away from the collecting region 91, so that the first color visual effect is smoothly compensated for the transition.
  • the second color highest grayscale is adjusted as the second color Grayscale value.
  • the second reference grayscale value corresponding to each pixel point in the peripheral area 93 is equal, and the size of the second reference grayscale value may be selected according to an actual adjustment effect of the image, where the second reference grayscale value is 1/2, 1/3 or 1/4 of the average grayscale value of the original grayscale value of the second color. If the average grayscale value of the original grayscale value of the second color is Y2, the second reference grayscale value is The product of the average value Y2 of the original gray scale value of the second color and an adjustment coefficient, the adjustment coefficient being greater than or equal to 1/4 and less than or equal to 1/2.
  • the second reference gray scale values corresponding to each pixel point in the peripheral area 93 are equal to reduce the data processing complexity of the image parsing module 35.
  • the third color original grayscale value of the at least one pixel corresponding to the peripheral region 93 is adjusted to the third color adjustment grayscale value, so that each of the peripheral regions 93
  • the ratio between the average of the first color adjustment grayscale value of the pixel and the average of the third color adjustment grayscale value is the first adjustment value.
  • the third color adjustment grayscale value is greater than the third color original grayscale value, and the third color adjustment value may be a sum of the third color original grayscale value and a third reference grayscale value. It can be understood that the third reference gray scale value is also a positive integer.
  • the grayscale value corresponding to the adjusted third color in the peripheral region 93 is larger than the grayscale value before the adjustment, so that the luminance of the first color and the third color ratio in the peripheral region 93 are relatively decreased.
  • the brightness value of the first color in the collection area 91 is increased relative to the peripheral area 93, thereby visually compensating the collection area 91 for the first color, improving the visual effect of the first color.
  • the third reference gray scale value gradually decreases along a direction away from the collection area.
  • the third color highest grayscale is adjusted as the third color Grayscale value.
  • the third reference grayscale value corresponding to each pixel point in the peripheral area 93 is equal, and the size of the third reference grayscale value may be selected according to an actual adjustment effect of the image, where the third reference grayscale value is 1/2, 1/3 or 1/4 of the average grayscale value of the original grayscale value of the third color. If the average grayscale value of the original grayscale value of the third color is Y3, the third reference grayscale value is The product of the average value Y3 of the original grayscale value of the third color and an adjustment coefficient, the adjustment coefficient being greater than or equal to 1/4 and less than or equal to 1/2.
  • the third reference grayscale values corresponding to each pixel point in the peripheral area 93 are equal to reduce the data processing complexity of the image parsing module 35.
  • the second color original gray scale value corresponding to the at least one pixel point of the peripheral area 93 is adjusted to the second color adjustment gray scale value, and the third color original gray scale value is used. Adjusting to the third color adjustment grayscale value such that the ratio between the average of the first color adjustment grayscale value of each pixel point of the peripheral region 93 and the average of the second and third color adjustment grayscale values Is the first adjustment value.
  • the second color adjustment grayscale value is greater than the second color original grayscale value, and the second color adjustment value may be a sum of the second color original grayscale value and the second reference grayscale value, the third The color adjustment grayscale value is greater than the third color original grayscale value, and the third color adjustment value may be a sum of the third color original grayscale value and the third reference grayscale value.
  • the adjusted grayscale values of the second and third colors in the peripheral region 93 are larger than the grayscale values before the adjustment, so that the brightness of the first color in the peripheral region 93 is the second and third colors.
  • the ratio is relatively reduced such that the luminance value of the first color in the collection region 91 is increased relative to the peripheral region 93, thereby visually compensating the collection region 91 for the first color, improving the visual effect of the first color.
  • the second and third reference grayscale values gradually decrease along a direction away from the collection region.
  • the second color highest grayscale is adjusted as the second color Grayscale value.
  • the third color highest grayscale is used as the third color adjustment gray. Order value.
  • the second reference grayscale value corresponding to each pixel point in the peripheral area 93 is equal
  • the third reference grayscale value corresponding to each pixel point is equal
  • the size of the second and third reference grayscale values may be according to the image.
  • the actual adjustment effect is selected, for example, 1/2, 1/3 or 1/4 of the average grayscale value of the first, second, and third color original grayscale values, respectively, to reduce the image resolution mode. Group 35 data processing complexity.
  • the first color original grayscale value corresponding to at least one pixel corresponding to the peripheral area 93 is adjusted to the first color adjustment grayscale value, and the second color original gray is grayed out. Adjusting the step value to the second color adjustment gray scale value such that the ratio between the average value of the first color adjustment gray scale value of each pixel point of the peripheral region 93 and the average value of the second color adjustment gray scale value is The first adjustment value.
  • the first color adjustment grayscale value is smaller than the first color original grayscale value, and the first color adjustment value may be a difference between the first color original grayscale value and the first reference grayscale value, and the second color adjustment The grayscale value is greater than the second color original grayscale value, and the second colortone adjustment value may be the sum of the second color original grayscale value and a second reference grayscale value.
  • the grayscale value corresponding to the adjusted first color in the peripheral area 93 is smaller than the grayscale value before the adjustment, and the grayscale value corresponding to the second color is larger than the grayscale value before the adjustment.
  • the brightness of the first color in the peripheral area 93 is relatively reduced from the second color ratio, so that the brightness value of the first color in the collection area 91 is increased with respect to the peripheral area 93, thereby visually achieving the first to the collection area 91.
  • the color compensation compensates for the visual effect of the first color.
  • the first and second reference grayscale values gradually decrease along a direction away from the collection region.
  • the second color highest grayscale is adjusted as the second color Grayscale value.
  • the first reference grayscale value corresponding to each pixel point in the peripheral area 93 is equal
  • the second reference grayscale value corresponding to each pixel point is equal
  • the size of the first and second reference grayscale values may be according to the image.
  • the actual adjustment effect is selected, for example, 1/2, 1/3 or 1/4 of the average grayscale value of the first and second color original grayscale values, respectively, to reduce the image analysis module 35. Data processing complexity.
  • the first color original grayscale value corresponding to at least one pixel corresponding to the peripheral region 93 is adjusted to the first color adjustment grayscale value, and the third color original gray is grayed out. Adjusting the step value to the third color adjustment grayscale value such that the ratio between the average value of the first color adjustment grayscale value of each pixel point of the peripheral region 93 and the average value of the third color adjustment grayscale value is The first adjustment value.
  • the first color adjustment grayscale value is smaller than the first color original grayscale value, and the first color adjustment value may be a difference between the first color original grayscale value and the first reference grayscale value, and at the same time, the third color adjustment The grayscale value is greater than the third color original grayscale value, and the third colortone adjustment value may be the sum of the third color original grayscale value and a third reference grayscale value.
  • the grayscale value corresponding to the adjusted first color in the peripheral area 93 is smaller than the grayscale value before the adjustment, and the grayscale value corresponding to the third color is larger than the grayscale value before the adjustment.
  • the brightness of the first color in the peripheral area 93 is relatively reduced with the third color ratio, so that the brightness value of the first color in the collection area 91 is increased with respect to the peripheral area 93, thereby visually achieving the first to the collection area 91.
  • the color compensation compensates for the visual effect of the first color.
  • the first and third reference gray scale values gradually decrease along a direction away from the collection region.
  • the third color highest grayscale is adjusted as the third color Grayscale value.
  • the first reference grayscale value corresponding to each pixel point in the peripheral area 93 is equal
  • the third reference grayscale value corresponding to each pixel point is equal
  • the size of the first and third reference grayscale values may be according to the image.
  • the actual adjustment effect is selected, for example, 1/2, 1/3 or 1/4 of the average grayscale value of the first and third color original grayscale values, respectively, to reduce the image analysis module 35. Data processing complexity.
  • the first color original grayscale value corresponding to at least one pixel corresponding to the peripheral region 93 is adjusted to the first color adjustment grayscale value, and the second color original gray is grayed out. Adjusting the step value to the second color adjustment grayscale value, and adjusting the third color original grayscale value to the third color adjustment grayscale value, so that the first color of each pixel of the peripheral region 93 adjusts the grayscale value
  • the ratio between the average value of the second and third color adjustment grayscale values is the first adjustment value.
  • the first color adjustment grayscale value is smaller than the first color original grayscale value, and the first color adjustment value may be a difference between the first color original grayscale value and the first reference grayscale value, and the second color adjustment
  • the grayscale value is greater than the second color original grayscale value, and the second color adjustment value may be a sum of the second color original grayscale value and the second reference grayscale value, and the third color adjusted grayscale value is greater than
  • the third color original grayscale value, the third color adjustment value may be a sum of the third color original grayscale value and the third reference grayscale value.
  • the grayscale value corresponding to the adjusted first color in the peripheral area 93 is smaller than the grayscale value before the adjustment, and the grayscale value corresponding to the second and third colors is compared with the grayscale before the adjustment.
  • the value is large such that the luminance of the first color in the peripheral region 93 is relatively reduced from the ratio of the second and third colors, so that the luminance value of the first color in the collection region 91 is increased relative to the peripheral region 93, thereby visually concentrating
  • the area 91 reaches the compensation for the first color, improving the visual effect of the first color.
  • the first, second, and third reference grayscale values gradually decrease along a direction away from the collection region.
  • the second color highest grayscale is adjusted as the second color Grayscale value.
  • the third color highest grayscale is used as the third color adjustment gray. Order value.
  • the first reference grayscale value corresponding to each pixel point in the peripheral area 93 is equal
  • the second reference grayscale value corresponding to each pixel point is equal
  • the third reference grayscale value corresponding to each pixel point is equal
  • the size of the first, second, and third reference grayscale values may be selected according to an actual adjustment effect of the image, for example, may be an average grayscale value of the first, second, and third color original grayscale values, respectively. /2, 1/3 or 1/4 to reduce the data processing complexity of the image analysis module 35.
  • the projection system 100 adjusts the grayscale value of the pixel points of the peripheral region 93 of the collection region 91 such that the first color of each pixel of the peripheral region 93 adjusts the grayscale value.
  • the ratio between the average value and the average value of the second color adjustment gray scale value decreases, and the first color brightness of the peripheral region 93 of the collection region 91 decreases or the brightness of the second color increases, according to the visual characteristics of the human eye.
  • the color matching degree between the collection area 91 and its peripheral area 93 is increased, and the user will obtain a brighter visual effect of the first color of the collection area 91, improving the influence of the first color light in the light-emitting device 10.
  • the problem of the projected picture effect of the projection system 100 is described.

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  • Image Processing (AREA)

Abstract

一种图像处理装置与包括该图像处理装置的投影***。所述图像处理装置包括发光装置、图像处理装置与光阀。其中，发光装置用于出射至少第一、第二两种颜色光线，图像处理装置用于获取并且分析每帧输入图像数据，并且针对输入图像中满足预定条件的灰阶值进行调整，光阀用于依据所述图像处理装置调整后的灰阶值调制所述发光装置出射的光线，以形成显示图像。

Description

图像处理装置与投影*** 技术领域
本发明涉及投影技术领域，特别涉及一种图像处理装置与投影***。
 背景技术
现有投影***一般包括发光装置、光阀及图像处理装置，所述发光装置出射红、绿、蓝三种颜色光线，所述图像处理装置获取输入图像数据并控制所述光阀接收所述三种颜色光线及依据输入图像数据调制图像。
技术问题
然而，所述发光装置因荧光粉效率不佳及老化等原因经常存在某种颜色光不足(如红色光不足)的问题，影响所述投影***的投影画面效果。
 技术解决方案
为解决现有技术投影***投影画面效果不佳的技术问题，有必要提供一种画面效果较佳的图像处理装置。
进一步，提供一种包括前述图像处理装置的投影***。
一种图像处理装置，用于获取待显示图像的图像数据，所述图像数据包含所述待显示图像的像素点的第一颜色的灰阶值以及区别于所述第一颜色的至少一种第二颜色的灰阶值，根据所述图像数据获取所述待显示图像中所述第一颜色的汇集区域，所述汇集区域中像素点的第一颜色的灰阶值高于一第一预设灰阶值，且所述汇集区域的面积大于一预设面积，调整所述待显示图像中所述汇集区域的***区域的像素点的颜色灰阶值以形成调整后的图像数据，使得所述***区域的像素点调整后的所述第一颜色的灰阶值与所述至少一种第二颜色的灰阶值的比值相较于调整前变小。所述调整后的图像数据用于输出给光阀以调制图像。
优选地，所述图像处理装置将所述***区域中像素点对应的所述第一颜色的灰阶值调整为第一颜色调整灰阶值，所述第一颜色调整灰阶值小于所述第一颜色的灰阶值，且所述第一颜色调整灰阶值为所述第一颜色的灰阶值与一第一参考灰阶值之差。
优选地，所述图像处理装置沿远离所述汇集区域的方向针对所述***区域逐渐调整所述第一颜色的灰阶值，且所述第一参考灰阶值沿远离所述汇集区域的方向逐渐变小。
优选地，所述***区域的每个像素点的第一参考灰阶值相等。
优选地，所述第一参考灰阶值为所述第一颜色对应的调整前灰阶值的平均值与一调整系数的乘积，所述调整系数大于等于1/4且小于等于1/2。
优选地，所述图像处理装置将所述***区域中像素点对应的所述至少一种第二颜色灰阶值调整为第二颜色调整灰阶值，所述第二颜色的原始灰阶值大于所述至少一种第二颜色灰阶值，且所述第二颜色调整灰阶值为所述至少一种第二颜色的原始灰阶值与一第二参考灰阶值之和。
优选地，所述第二参考灰阶值沿远离所述汇集区域的方向逐渐变小。
优选地，所述***区域的每个像素点的所述第二参考灰阶值相等。
优选地，所述第二参考灰阶值为所述至少一种第二颜色调整前灰阶值的平均值与一调整系数的乘积，所述调整系数大于等于1/4且小于等于1/2。
优选地，若所述至少一种第二颜色调整前的灰阶值与所述第二参考灰阶值之和超过所述至少一种第二颜色的最高灰阶值，则将所述至少一种第二颜色的最高灰阶值作为所述第二颜色调整灰阶值。
优选地，述第一颜色为红色，所述至少一种第二颜色为绿色或蓝色。
优选地，所述***区域邻接并环绕于该汇集区域外侧，且该***区域外侧轮廓与该汇集区域的外侧的轮廓一致。
一种投影***，包括前述图像处理装置以及一发光装置与一光阀,所述发光装置用于出射所述的第一颜色与至少一种第二颜色的光线，所述光阀用于依据所述图像处理装置调整后的灰阶值调制所述发光装置出射的光线，以形成显示图像。
 有益效果
与现有技术相比较，所述图像处理装置将所述汇集区域的***区域的像素点的灰阶值调整，使得所述***区域的各像素点的第一颜色调整灰阶值的平均值与第二颜色调整灰阶值的平均值之间的比例减小，进而所述汇集区域的***区域的第一颜色亮度减小或第二颜色亮度增加，根据人眼的视觉特性，所述汇集区域与其***区域的颜色比对度增加，使用者将获得所述汇集区域的第一颜色更亮的视觉效果，改善原发光装置第一颜色光不足导致影响所述投影***的投影画面效果的问题。
 附图说明
图1是本发明第一实施方式中投影***的示意图。
图2为图1所示色轮的平面结构示意图。
图3为待显示的一帧输入图像的示意图。
图4为图3所示对应红色像素进行颜色调整补偿示意图。
主要元件符号说明
投影*** 100
发光装置 10
光源 11
色轮 13
匀光装置 15
光阀 20
图像处理装置 30
控制模组 31
图像解析模组 35
投影镜头 40
输入图像 a
第一子帧图像 a1
第二子帧图像 a2
第三子帧图像 a3
汇集区域 91
***区域 93
如下具体实施方式将结合上述附图进一步说明本发明。
 本发明的最佳实施方式
下面将结合本发明实施方式中的附图，对本发明实施方式中的技术方案进行具体描述。
请参阅图1，图1为本发明第一实施方式中投影***100的示意图。本发明实施方式提供一种投影***100，其包括发光装置10、光阀20、图像处理装置30以及投影镜头40。发光装置10用于出射并提供显示用光线，其中，发光装置10至少提供第一颜色的光线与至少一种第二颜色的光线。光阀20用于在图像处理装置30的控制下选择性将光线提供至投影镜头40进行图像显示。本实施方式中，所述投影***100还包括投影屏幕等必要或非必要的结构特征，在此不作赘述。
本实施方式中，所述发光装置10出射第一颜色、第二颜色与第三颜色三种颜色的光线。具体地，发光装置10包括光源11、色轮13以及匀光装置15。所述光源11用于产生一激发光，优选的，所述激发光为紫外光。所述光源11可以为发光二极管、激光二极管或其它固态光源。色轮13用于依据光源11所出射光线的激发从而出射不同于光源11光线波长的光线。匀光装置15用于接收色轮13所出射的光线，从而使得光线均匀化。
具体地，请参阅图2，其中，图2为图1所示色轮13的平面结构示意图。所述色轮13上承载有波长转换材料。所述色轮13通过一驱动装置（图未示）的驱动而转动。
所述色轮13为一大致呈圆盘状的色轮结构，其包括第一分段131、第二分段133、第三分段135，所述三个分段为面积大小相同的扇形结构。
其中，色轮13上对应三个分段分别设置不同波长转换材料，其中，第一分段131可将入射光转换为第一颜色光线；第二分段133可将入射光转为第二颜色光线；第三分段135可将入射光转换为第三颜色光线。所述波长转换材料可以是荧光粉、量子点材料或能够将激发光转换成适当颜色的受激光的其他材料。
本实施方式中，所述第一颜色光线为红光，所述第二颜色光线为绿光，所述第三颜色光线为蓝光。本实施方式中，所述第一颜色光线波长转换材料层为红色荧光粉，所述第二颜色光线波长转换材料层为绿色荧光粉，所述第三颜色光线波长转换材料层为蓝色荧光粉。
可变更地，在本发明其他实施方式中，当光源11为蓝色激发光源时，色轮13对应的第三分段133可以无须设置用着波长转换的荧光粉，仅需设置散射材料使得自色轮13的第三分段出射的蓝光较为均匀，或者第三分段133直接设置为光透射层，从而使得光源11出射的光线。
所述光阀20位于所述色轮13出射的光线的传输路径中。所述色轮13出射的光线能够入射到所述光阀20。经所述光阀20调制后的第一颜色光线、第二颜色光线、第三颜色光线到达投影镜头进行投影显示图像。可以理解，所述光阀20可以为液晶显示模组（Liquid Crystal Display, LCD）、液晶显示模组与CMOS集成电路结合的反射型显示模组（Liquid Crystal on Silicon, LCoS）、数据微镜装置(Digital Micromirror Device, DMD)等。
所述图像处理装置30包括控制模组31及图像解析模组35。所述控制模组31用以开启或关闭所述光源11、驱动控制所述色轮13运动以及图像调制。
所述图像解析模组35接收图像信号，并且进行解析以获取每一帧待显示的图像中每一个像素点对应的图像数据，其中，所述的图像数据包括待显示的图像中每一个像素点对应的各颜色的灰阶值。进一步，所述图像解析模组35还依据控制模组31的输出信号对所述图像数据进行调制处理。
其中，所述图像解析模组35获取图像数据，所述图像数据包括所述待显示的图像的像素点的第一颜色的灰阶值以及区别于所述第一颜色的至少一种第二颜色的灰阶值。本实施方式中，所述图像数据包括图像的各像素点的第一颜色、第二颜色与第三颜色对应的灰阶值。
请参阅图3，图3为待显示的一帧输入图像的示意图。其中，每一帧待显示的输入图像a包括不同颜色的第一子帧图像a1、第二子帧图像a2以及第三子帧图像a3。其中，第一子帧图像a1对应第一颜色的红色像素，第二子帧图像a2对应第二颜色的绿色像素，第三子帧图像a3对应第三颜色的蓝色像素。可以理解，第一子帧图像a1、第二子帧图像a2以及第三子帧图像a3组合构成待显示的输入图像a，并且实现彩色显示，同时，所述的三个子帧图像按照时间顺序分别传输至投影镜头40。
进一步，请参阅图4，其中，图4为针对图3所示第一颜色像素对应的灰阶进行调整补偿示意图。
首先，对应输入图像a定义一汇集区域91，对应所述输入图像连续像素点的第一颜色原始灰阶值均高于一第一预设灰阶且所述连续像素点所占区域的面积大于一预设面积，换句话说，第一子帧图像a1中对应汇集区域91的灰阶值均高于所述第一预设灰阶。
可以理解，汇集区域91对应在三个子帧图像第一子帧图像a1、第二子帧图像a2以及第三子帧图像a3的坐标位置相同。需要说明的是，本实施方式中，汇集区域91在输入图像a中坐标位置仅为示意，在本发明其他实施方式中，汇集区域91可以位于输入图像a的任何位置，并不限定于此，同时，汇集区域91的数量也并未限定仅为1个，其数量亦可以为2个、3个或者其他数量。
进一步，定义邻接并且环形封闭包围所述汇集区域91的区域为***区域93，且该***区域93的外侧轮廓与该汇集区域的91外侧的轮廓一致，也即是该***区域93的外侧轮廓与该汇集区域的91外侧的轮廓形状相同而大小不同，换言之，该汇集区域的91外侧的轮廓为该***区域93的外侧轮廓等比例扩大形成。可变更地，在本发明其他变更实施方式中，***区域93也可以无需封闭性的包围所述汇集区域91。
所述图像解析模组35根据输入图像数据进行解析，从而判定汇集区域91是否满足第一颜色原始灰阶值均高于所述第一预设灰阶以及连续像素点所占区域的面积大于所述预设面积。当汇集区域91满足前述条件时，则图像解析模组35输出一第一调整信号至控制模组31，控制模组31则依据所述第一调整信号对***区域93中第二、第三颜色原始灰阶值进行调整，从而达成降低***区域93中第一颜色与第二颜色、第三颜色之间的亮度比值，例如降低第一颜色的灰阶值，或者增加第二颜色、第三颜色的灰阶值，否则，当汇集区域91并未满足前述条件时，控制模组31与图像解析模组35并无需对***区域93中第一颜色、第二颜色、第三颜色的原始灰阶值进行调整。
定义第一颜色原始灰阶值的平均值与其他颜色，如第二颜色或者第三颜色的原始灰阶值的平均值之间的比值为第一初始值。当控制模组31接收到所述第一调整信号时，则将所述第一初始值调整至第一调整值，其中，所述第一调整值小于所述第一初始值。
具体地，将***区域93对应的至少一像素点的第一颜色原始灰阶值调整至第一颜色调整灰阶值，以使得所述***区域93的各像素点的第一颜色调整灰阶值的平均值与第二颜色、第三颜色调整灰阶值的平均值之间的比值为所述第一调整值。
所述第一颜色调整灰阶值小于第一颜色原始灰阶值，所述第一颜色调整值可为第一颜色原始灰阶值与一第一参考灰阶值之差，其中，所述第一参考灰阶值为正整数。由此，***区域93中经过调整后的第一颜色对应的灰阶值相较于调整前的灰阶值小，从而使得***区域93中第一颜色相较于第二颜色、第三颜色的亮度比例相对减小，则汇集区域91中第一颜色的亮度值相对于***区域93增加，以达成在视觉上对汇集区域91对第一颜色的补偿，提高第一颜色的视觉效果。
本实施方式中，所述第一参考灰阶值沿远离所述汇集区域91的方向逐渐变小，从而使得第一颜色视觉效果得到平缓的补偿过渡。
可变更地，***区域93中对应的第一参考灰阶值相等，且第一参考灰阶值的大小可依据图像的实际调整效果进行选择，所述第一参考灰阶值为所述第一颜色原始灰阶值的平均灰阶值的1/2、1/3或者1/4。换句话说，若第一颜色原始灰阶值的平均灰阶值为Y1，则第一参考灰阶值为第一颜色原始灰阶值的平均值Y1与一调整系数的乘积，所述调整系数大于等于1/4且小于等于1/2。由于***区域93中对应的第一参考灰阶值相等，可有效减小图像解析模组35的数据处理复杂度。
可变更地，在本发明第二实施方式中，将***区域93对应的至少一像素点的第二颜色原始灰阶值调整至第二颜色调整灰阶值，以使得所述***区域93的各像素点的第一颜色调整灰阶值的平均值与第二颜色调整灰阶值的平均值之间的比值为所述第一调整值。其中，第二颜色调整灰阶值大于第二颜色原始灰阶值，所述第二颜色调整值可为第二颜色原始灰阶值与一第二参考灰阶值的叠加之和。可以理解，所述第二参考灰阶值也为正整数。
由此，***区域93中经过调整后的第二颜色对应的灰阶值相较于调整前的灰阶值大，从而使得***区域93中第一颜色的亮度与第二颜色比例相对减小，则汇集区域91中第一颜色的亮度值相对于***区域93增加，以达成在视觉上对汇集区域91达到对第一颜色的补偿，提高第一颜色的视觉效果。
本实施方式中，所述第二参考灰阶值沿远离所述汇集区域91的方向逐渐变小，以使得第一颜色视觉效果得到平缓的补偿过渡。
优选地，当第二颜色原始灰阶值与所述第二参考灰阶值之和大于第二颜色最高灰阶值，即255灰阶时，则将第二颜色最高灰阶作为第二颜色调整灰阶值。
优选地，***区域93中每个像素点对应的第二参考灰阶值相等，且第二参考灰阶值的大小可依据图像的实际调整效果进行选择，所述第二参考灰阶值为所述第二颜色原始灰阶值的平均灰阶值的1/2、1/3或者1/4，若第二颜色原始灰阶值的平均灰阶值为Y2，则第二参考灰阶值为第二颜色原始灰阶值的平均值Y2与一调整系数的乘积，所述调整系数大于等于1/4且小于等于1/2。***区域93中每个像素点对应的第二参考灰阶值相等，以减小图像解析模组35的数据处理复杂度。
可变更地，在本发明第三实施方式中，将***区域93对应的至少一像素点的第三颜色原始灰阶值调整至第三颜色调整灰阶值，以使得所述***区域93的各像素点的第一颜色调整灰阶值的平均值与第三颜色调整灰阶值的平均值之间的比值为所述第一调整值。其中，第三颜色调整灰阶值大于第三颜色原始灰阶值，所述第三颜色调整值可为第三颜色原始灰阶值与一第三参考灰阶值之和。可以理解，所述第三参考灰阶值也为正整数。
由此，***区域93中经过调整后的第三颜色对应的灰阶值相较于调整前的灰阶值大，从而使得***区域93中第一颜色的亮度与第三颜色比例相对减小，使得汇集区域91中第一颜色的亮度值相对于***区域93增加，从而在视觉上对汇集区域91达到对第一颜色的补偿，提高第一颜色的视觉效果。
本实施方式中，所述第三参考灰阶值沿远离所述汇集区域的方向逐渐变小。
优选地，当第三颜色原始灰阶值与所述第三参考灰阶值之和大于第三颜色最高灰阶值，即255灰阶时，则将第三颜色最高灰阶作为第三颜色调整灰阶值。
优选地，***区域93中每个像素点对应的第三参考灰阶值相等，且第三参考灰阶值的大小可依据图像的实际调整效果进行选择，所述第三参考灰阶值为所述第三颜色原始灰阶值的平均灰阶值的1/2、1/3或者1/4，若第三颜色原始灰阶值的平均灰阶值为Y3，则第三参考灰阶值为第三颜色原始灰阶值的平均值Y3与一调整系数的乘积，所述调整系数大于等于1/4且小于等于1/2。***区域93中每个像素点对应的第三参考灰阶值相等，以减小图像解析模组35的数据处理复杂度。
可变更地，在本发明第四实施方式中，将***区域93对应至少一像素点对应的第二颜色原始灰阶值调整至第二颜色调整灰阶值，以及将第三颜色原始灰阶值调整至第三颜色调整灰阶值，以使得所述***区域93的各像素点的第一颜色调整灰阶值的平均值与第二、第三颜色调整灰阶值的平均值之间的比值为所述第一调整值。其中，第二颜色调整灰阶值大于第二颜色原始灰阶值，所述第二颜色调整值可为第二颜色原始灰阶值与所述第二参考灰阶值之和，所述第三颜色调整灰阶值大于第三颜色原始灰阶值，所述第三颜色调整值可为第三颜色原始灰阶值与所述第三参考灰阶值之和。
由此，***区域93中经过调整后第二、第三颜色对应的灰阶值相较于调整前的灰阶值大，从而使得***区域93中第一颜色的亮度与第二、第三颜色比例相对减小，使得汇集区域91中第一颜色的亮度值相对于***区域93增加，从而在视觉上对汇集区域91达到对第一颜色的补偿，提高第一颜色的视觉效果。
本实施方式中，所述第二、第三参考灰阶值沿远离所述汇集区域的方向逐渐变小。
优选地，当第二颜色原始灰阶值与所述第二参考灰阶值之和大于第二颜色最高灰阶值，即255灰阶时，则将第二颜色最高灰阶作为第二颜色调整灰阶值。同时，当第三颜色原始灰阶值与所述第三参考灰阶值之和大于第三颜色最高灰阶值，即255灰阶时，则将第三颜色最高灰阶作为第三颜色调整灰阶值。
优选地，***区域93中每个像素点对应的第二参考灰阶值相等，每个像素点对应的第三参考灰阶值相等，且第二、第三参考灰阶值的大小可依据图像的实际调整效果进行选择，例如可分别为所述第一、第二、第三颜色原始灰阶值的平均灰阶值的1/2、1/3或者1/4，以减小图像解析模组35的数据处理复杂度。
可变更地，在本发明第五实施方式中，将***区域93对应的至少一像素点对应的第一颜色原始灰阶值调整至第一颜色调整灰阶值，同时，将第二颜色原始灰阶值调整至第二颜色调整灰阶值，以使得所述***区域93的各像素点的第一颜色调整灰阶值的平均值与第二颜色调整灰阶值的平均值之间的比值为所述第一调整值。其中，第一颜色调整灰阶值小于第一颜色原始灰阶值，所述第一颜色调整值可为第一颜色原始灰阶值与第一参考灰阶值之差，同时，第二颜色调整灰阶值大于第二颜色原始灰阶值，所述第二颜色调整值可为第二颜色原始灰阶值与一第二参考灰阶值之和。
由此，***区域93中经过调整后的第一色对应的灰阶值相较于调整前的灰阶值小，而第二颜色对应的灰阶值相较于调整前的灰阶值大，从而使得***区域93中第一颜色的亮度与第二颜色比例相对减小，使得汇集区域91中第一颜色的亮度值相对于***区域93增加，从而在视觉上对汇集区域91达到对第一颜色的补偿，提高第一颜色的视觉效果。
本实施方式中，所述第一、二参考灰阶值沿远离所述汇集区域的方向逐渐变小。
优选地，当第二颜色原始灰阶值与所述第二参考灰阶值之和大于第二颜色最高灰阶值，即255灰阶时，则将第二颜色最高灰阶作为第二颜色调整灰阶值。
优选地，***区域93中每个像素点对应的第一参考灰阶值相等，每个像素点对应的第二参考灰阶值相等，且第一、第二参考灰阶值的大小可依据图像的实际调整效果进行选择，例如可分别为所述第一、第二颜色原始灰阶值的平均灰阶值的1/2、1/3或者1/4，以减小图像解析模组35的数据处理复杂度。
可变更地，在本发明第六实施方式中，将***区域93对应的至少一像素点对应的第一颜色原始灰阶值调整至第一颜色调整灰阶值，同时，将第三颜色原始灰阶值调整至第三颜色调整灰阶值，以使得所述***区域93的各像素点的第一颜色调整灰阶值的平均值与第三颜色调整灰阶值的平均值之间的比值为所述第一调整值。其中，第一颜色调整灰阶值小于第一颜色原始灰阶值，所述第一颜色调整值可为第一颜色原始灰阶值与第一参考灰阶值之差，同时，第三颜色调整灰阶值大于第三颜色原始灰阶值，所述第三颜色调整值可为第三颜色原始灰阶值与一第三参考灰阶值之和。
由此，***区域93中经过调整后的第一色对应的灰阶值相较于调整前的灰阶值小，而第三颜色对应的灰阶值相较于调整前的灰阶值大，从而使得***区域93中第一颜色的亮度与第三颜色比例相对减小，使得汇集区域91中第一颜色的亮度值相对于***区域93增加，从而在视觉上对汇集区域91达到对第一颜色的补偿，提高第一颜色的视觉效果。
本实施方式中，所述第一、三参考灰阶值沿远离所述汇集区域的方向逐渐变小。
优选地，当第三颜色原始灰阶值与所述第三参考灰阶值之和大于第三颜色最高灰阶值，即255灰阶时，则将第三颜色最高灰阶作为第三颜色调整灰阶值。
优选地，***区域93中每个像素点对应的第一参考灰阶值相等，每个像素点对应的第三参考灰阶值相等，且第一、第三参考灰阶值的大小可依据图像的实际调整效果进行选择，例如可分别为所述第一、第三颜色原始灰阶值的平均灰阶值的1/2、1/3或者1/4，以减小图像解析模组35的数据处理复杂度。
可变更地，在本发明第七实施方式中，将***区域93对应的至少一像素点对应的第一颜色原始灰阶值调整至第一颜色调整灰阶值，同时，将第二颜色原始灰阶值调整至第二颜色调整灰阶值，以及将第三颜色原始灰阶值调整至第三颜色调整灰阶值，以使得所述***区域93的各像素点的第一颜色调整灰阶值的平均值与第二、第三颜色调整灰阶值的平均值之间的比值为所述第一调整值。其中，第一颜色调整灰阶值小于第一颜色原始灰阶值，所述第一颜色调整值可为第一颜色原始灰阶值与第一参考灰阶值之差，同时，第二颜色调整灰阶值大于第二颜色原始灰阶值，所述第二颜色调整值可为第二颜色原始灰阶值与所述第二参考灰阶值之和，所述第三颜色调整灰阶值大于第三颜色原始灰阶值，所述第三颜色调整值可为第三颜色原始灰阶值与所述第三参考灰阶值之和。
由此，***区域93中经过调整后的第一色对应的灰阶值相较于调整前的灰阶值小，而第二、第三颜色对应的灰阶值相较于调整前的灰阶值大，从而使得***区域93中第一颜色的亮度与第二、第三颜色比例相对减小，使得汇集区域91中第一颜色的亮度值相对于***区域93增加，从而在视觉上对汇集区域91达到对第一颜色的补偿，提高第一颜色的视觉效果。
本实施方式中，所述第一、第二、第三参考灰阶值沿远离所述汇集区域的方向逐渐变小。
优选地，当第二颜色原始灰阶值与所述第二参考灰阶值之和大于第二颜色最高灰阶值，即255灰阶时，则将第二颜色最高灰阶作为第二颜色调整灰阶值。同时，当第三颜色原始灰阶值与所述第三参考灰阶值之和大于第三颜色最高灰阶值，即255灰阶时，则将第三颜色最高灰阶作为第三颜色调整灰阶值。
优选地，***区域93中每个像素点对应的第一参考灰阶值相等，每个像素点对应的第二参考灰阶值相等，每个像素点对应的第三参考灰阶值相等，且第一、第二、第三参考灰阶值的大小可依据图像的实际调整效果进行选择，例如可分别为所述第一、第二、第三颜色原始灰阶值的平均灰阶值的1/2、1/3或者1/4，以减小图像解析模组35的数据处理复杂度。
与现有技术相比较，所述投影***100将所述汇集区域91的***区域93的像素点的灰阶值调整，使得所述***区域93的各像素点的第一颜色调整灰阶值的平均值与第二颜色调整灰阶值的平均值之间的比例减小，进而所述汇集区域91的***区域93的第一颜色亮度减小或第二颜色亮度增加，根据人眼的视觉特性，所述汇集区域91与其***区域93的颜色比对度增加，使用者将获得所述汇集区域91的第一颜色更亮的视觉效果，改善由于发光装置10中第一颜色光不足导致影响所述投影***100的投影画面效果的问题。

Claims (13)

1、一种图像处理装置，其特征在于：
所述图像处理装置用于获取待显示图像的图像数据，所述图像数据包含所述待显示图像的像素点的第一颜色的灰阶值以及区别于所述第一颜色的至少一种第二颜色的灰阶值，根据所述图像数据获取所述待显示图像中所述第一颜色的汇集区域，所述汇集区域中像素点的第一颜色的原始灰阶值高于一第一预设灰阶值，且所述汇集区域的面积大于一预设面积，调整所述待显示图像中所述汇集区域的***区域的像素点的颜色灰阶值以形成调整后的图像数据，使得所述***区域的像素点调整后的所述第一颜色的灰阶值与所述至少一种第二颜色的灰阶值的比值相较于调整前变小；
所述调整后的图像数据用于输出给光阀以调制图像。
2.如权利要求1所述的图像处理装置，其特征在于：所述图像处理装置将所述***区域中像素点对应的所述第一颜色的灰阶值由第一颜色原始灰阶值调整为第一颜色调整灰阶值，所述第一颜色调整灰阶值小于所述第一颜色原始灰阶值，且所述第一颜色调整灰阶值为所述第一颜色原始灰阶值与一第一参考灰阶值之差。
3.如权利要求2所述的图像处理装置，其特征在于：所述图像处理装置沿远离所述汇集区域的方向针对所述***区域逐渐调整所述第一颜色的灰阶值，且所述第一参考灰阶值沿远离所述汇集区域的方向逐渐变小。
4.如权利要求2所述的图像处理装置，其特征在于：所述***区域的每个像素点的第一参考灰阶值相等。
5.如权利要求2所述的图像处理装置，其特征在于：所述第一参考灰阶值为所述第一颜色对应的调整前灰阶值的平均值与一调整系数的乘积，所述调整系数大于等于1/4且小于等于1/2。
6.如权利要求1所述的图像处理装置，其特征在于：所述图像处理装置将所述***区域中像素点对应的所述至少一种第二颜色的灰阶值调整为第二颜色调整灰阶值，所述第二颜色调整灰阶值大于所述至少一种第二颜色的原始灰阶值，且所述第二颜色调整灰阶值为所述至少一种第二颜色的原始的灰阶值与一第二参考灰阶值之和。
7.如权利要求6所述的图像处理装置，其特征在于：所述第二参考灰阶值沿远离所述汇集区域的方向逐渐变小。
8.如权利要求6所述的图像处理装置，其特征在于：所述***区域的每个像素点的所述第二参考灰阶值相等。
9. 如权利要求6所述的图像处理装置，其特征在于：所述第二参考灰阶值为所述至少一种第二颜色调整前灰阶值的平均值与一调整系数的乘积，所述调整系数大于等于1/4且小于等于1/2。
10.如权利要求6所述的图像处理装置，其特征在于：若所述至少一种第二颜色调整前的灰阶值与所述第二参考灰阶值之和超过所述至少一种第二颜色的最高灰阶值，则将所述至少一种第二颜色的最高灰阶值作为所述第二颜色调整灰阶值。
11.如权利要求1所述的图像处理装置，其特征在于：所述第一颜色为红色，所述至少一种第二颜色为绿色或蓝色。
12.如权利要求1-11任意一项所述的图像处理装置，其特征在于：所述***区域邻接并环绕于该汇集区域外侧，且该***区域外侧轮廓与该汇集区域的外侧的轮廓一致。
13.一种投影***，包括权利要求1-12任意一项所述的图像处理装置，以及一发光装置与一光阀,所述发光装置用于出射所述的第一颜色与至少一种第二颜色的光线，所述光阀用于依据所述图像处理装置调整后的灰阶值调制所述发光装置出射的光线，以形成显示图像。
PCT/CN2017/081259 2016-08-11 2017-04-20 图像处理装置与投影*** WO2018028237A1 (zh)

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