WO2016106865A1 - 基于边缘像素检测的rgbw显示装置的子像素补偿着色的方法 - Google Patents

基于边缘像素检测的rgbw显示装置的子像素补偿着色的方法 Download PDF

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WO2016106865A1
WO2016106865A1 PCT/CN2015/070854 CN2015070854W WO2016106865A1 WO 2016106865 A1 WO2016106865 A1 WO 2016106865A1 CN 2015070854 W CN2015070854 W CN 2015070854W WO 2016106865 A1 WO2016106865 A1 WO 2016106865A1
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pixel
data
saturated
pixels
block
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PCT/CN2015/070854
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English (en)
French (fr)
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李�浩
胡厚亮
金羽锋
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深圳市华星光电技术有限公司
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Priority to US14/425,051 priority Critical patent/US9633613B2/en
Publication of WO2016106865A1 publication Critical patent/WO2016106865A1/zh

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    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3607—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 by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • 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
    • G09G3/2003—Display of colours
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0232—Special driving of display border areas
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0457—Improvement of perceived resolution by subpixel rendering
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/06—Colour space transformation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present invention belongs to the field of display technologies, and in particular, to a method for sub-pixel compensation coloring of an RGBW display device based on edge pixel detection.
  • sub-pixel rendering and sub-pixel multiplexing techniques can improve the spatial resolution of the display image of the liquid crystal display, but the sub-pixel sampling technology causes the liquid crystal display to display high frequency.
  • the information is formed into image aliasing, and the sub-pixel multiplexing technique causes blurring of the image displayed on the liquid crystal display.
  • the present invention discloses a method for sub-pixel compensation coloring of an RGBW display device based on edge pixel detection, wherein the RG sub-pixel and the BW sub-pixel of the RGBW display device are respectively associated with a group
  • the method includes: receiving m sets of high-resolution RGB data; converting m sets of high-resolution RGB data into m sets of RGBW data; wherein, the RG sub-pixels and BWs of the RGBW display device The pixels respectively correspond to a set of RGBW data; determining whether edge pixels are included in the nine-square pixel block of the RGBW display device based on the high-resolution RGB data, wherein each pixel in the nine-square pixel block includes an RG sub-pixel or a BW sub-pixel a pixel; if the edge pixel is included in the ninth pixel block, determining whether a saturated pixel is included in the ninth pixel block based on the high-resolution RGB data
  • the edge pixels are not included in the Jiugong pixel block, the non-edge pixels of the RGBW display device are processed based on the RGBW data using a minimized error feedback adaptive method.
  • the center pixel in the ninth pixel block is subjected to filtering processing by using the second filtering method based on the RGBW data.
  • the method for determining whether the edge pixel is included in the Jiugong pixel block based on the high-resolution RGB data specifically includes: calculating the nine-square pixel block based on the Sobel operator in several directions and the high-resolution RGB data a matrix luminance value of one pixel; determining a maximum matrix luminance value; determining whether the maximum matrix luminance value is greater than a predetermined threshold; and if the maximum matrix luminance value is greater than the predetermined threshold, the maximum matrix luminance value corresponding to The pixels in the nine-square pixel block are edge pixels.
  • the Sobel operator based on the plurality of directions and the high-resolution RGB data use Equation 1 to calculate a matrix luminance value of any pixel in the Jiugong pixel block;
  • L n represents a matrix luminance value of an nth pixel in the nine-square pixel block
  • S d represents a Sobel operator in the d direction
  • d represents an angle
  • r represents R data corresponding to an nth pixel in the nine-square pixel block
  • g denotes G data corresponding to the nth pixel in the ninth pixel block
  • b denotes B data corresponding to the nth pixel in the ninth block.
  • the method for determining whether the saturated pixel is included in the nine-square pixel block based on the high-resolution RGB data specifically includes: determining a maximum data value and a minimum data in the RGB data corresponding to any pixel in the nine-square pixel block. a value; dividing the maximum data value by the minimum data value to obtain a data ratio; determining whether the data ratio is less than a predetermined threshold; and if the data ratio is not less than the predetermined threshold, the data ratio corresponds to The pixels in the nine-square pixel block are saturated pixels.
  • the first filtering method is specifically: if the central pixel in the Jiugong pixel block is a saturated pixel, or the second pixel is a saturated pixel, or the sixth pixel is a saturated pixel, or the eighth The pixel is a saturated pixel, or the fourth pixel is a saturated pixel, or the fourth pixel and the eighth pixel are saturated pixels, or the second pixel and the fourth pixel are saturated pixels, or the central pixel and the seventh pixel are saturated pixels, or One pixel and the center pixel are saturated pixels, or the third pixel and the center pixel are saturated pixels, or the second pixel, the third pixel, and the fourth pixel are saturated pixels, or the second pixel, the fourth pixel, and the seventh pixel are saturated a pixel, or a second pixel, a third pixel, a fourth pixel, and a seventh pixel are saturated pixels, or the first pixel, the fourth pixel, and the eighth pixel are saturated pixels, or the first pixel, the fourth pixel, and the eighth
  • P5_C represents C data of the central pixel processed by the first filtering method
  • C4 represents C data corresponding to the fourth pixel not processed by the first filtering method
  • C5 represents that the first filtering method is not performed.
  • C6 represents C data corresponding to the sixth pixel processed by the first filtering method
  • the C data is one of RGBW data.
  • the first filtering method is specifically: if the second pixel and the sixth pixel in the nine-square pixel block are saturated pixels, or the sixth pixel and the eighth pixel are saturated pixels, or the sixth pixel, the seventh pixel.
  • the pixel and the eighth pixel are saturated pixels, or the third pixel, the sixth pixel, and the eighth pixel are saturated pixels, or the first pixel, the second pixel, the sixth pixel, and the ninth pixel are saturated pixels, or the third pixel,
  • the sixth pixel, the seventh pixel, and the eighth pixel are saturated pixels, or the second pixel, the sixth pixel, and the ninth pixel are saturated pixels, or the first pixel, the second pixel, and the sixth pixel are saturated pixels, based on
  • the RGBW data is filtered by the center pixel of the Jiugong pixel block by using Equation 3,
  • P5_C represents C data corresponding to the central pixel processed by the first filtering method
  • C4 represents C data corresponding to the fourth pixel not processed by the first filtering method
  • C5 represents that the first filtering is not performed.
  • C6 represents the C data corresponding to the sixth pixel processed by the first filtering method
  • the C data is one of the RGBW data.
  • the first filtering method is specifically: if the first pixel, the central pixel, and the ninth pixel in the nine-square pixel block are saturated pixels, or the third pixel, the central pixel, and the seventh pixel are saturated pixels, or The third pixel, the fourth pixel, and the center pixel are saturated pixels, or the second pixel, the center pixel, and the seventh pixel are saturated pixels, or the second pixel, the center pixel, and the ninth pixel are saturated pixels, or the first pixel, the center The pixel and the eighth pixel are saturated pixels, or the third pixel, the center pixel, and the eighth pixel are saturated pixels, or the fourth pixel, the center pixel, and the ninth pixel are saturated pixels, and then the pair of equations 4 is used based on the RGBW data.
  • the central pixel of the Jiugong pixel block is filtered,
  • P5_C represents C data corresponding to the central pixel processed by the first filtering method
  • C4 represents C data corresponding to the fourth pixel not processed by the first filtering method
  • C5 represents that the first filtering is not performed.
  • C6 represents the C data corresponding to the sixth pixel processed by the first filtering method
  • the C data is one of the RGBW data.
  • the second filtering method is specifically: if the saturation pixel is not included in the ninth pixel block, the center pixel of the ninth pixel block is filtered by using the RGBW data,
  • P5_C 1/8*C2+1/8*C4+1/16*C5+1/8*C6+1/8*C8+1/4*C5-1/16*(C1+C3+C7+C9
  • P5_C represents C data of the central pixel processed by the second filtering method
  • C4 represents C data corresponding to the fourth pixel not processed by the second filtering method
  • C5 represents that the second filtering is not performed C data corresponding to the central pixel processed by the method
  • C6 represents C data corresponding to the sixth pixel processed by the second filtering method
  • C8 represents C data corresponding to the eighth pixel processed by the second filtering method
  • C1 denotes C data corresponding to the first pixel not processed by the second filtering method
  • C3 denotes C data corresponding to the third pixel not processed by the second filtering method
  • C7 denotes that the second filtering method is not used
  • C9 represents the C data corresponding to the ninth pixel processed by the
  • the sub-pixel compensation coloring method of the edge pixel detection-based RGBW display device of the present invention enables a low-resolution RGBW display device to display with high-resolution RGB data and can Effectively eliminate color aliasing.
  • FIG. 1 is a schematic diagram showing the arrangement of sub-pixels of a low-resolution RGBW display device according to the present invention, and a schematic diagram of arrangement of sub-pixels having a high-resolution RGB display device as a comparison;
  • FIG. 2 is a flowchart of a method of sub-pixel compensation coloring of an RGBW display device based on edge pixel detection, in accordance with an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a nine-square pixel block division of an RGBW display device according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of processing non-edge pixels of an RGBW display device using a minimized error feedback adaptive method, in accordance with an embodiment of the present invention.
  • a method for sub-pixel compensation coloring of an RGBW display device based on edge pixel detection wherein a low resolution display device (liquid crystal display device or organic light emitting diode display device) can utilize input high resolution RGB data is displayed.
  • a low resolution display device liquid crystal display device or organic light emitting diode display device
  • RGBW sub-pixels sub-pixels of a RGBW display device having low resolution
  • RGB sub-pixels sub-pixels having high-resolution RGB display devices as a comparison according to the present invention.
  • the resolution of the RGB display device is the same as the resolution of the input RGB data.
  • the RG sub-pixel and the BW sub-pixel of the RGBW display device respectively correspond to the RGB sub-pixels of the corresponding positions of the RGB display device, for example, the RG circled by the solid line frame.
  • the sub-pixel corresponds to the RGB sub-pixel circled by the solid line frame;
  • the BW sub-pixel circled by the dotted frame corresponds to the RGB sub-pixel circled by the dotted frame.
  • the correspondence can also be understood as: the RG sub-pixels circled by the solid line frame correspond to the RGB data used by the RGB sub-pixels circled by the solid line frame and the RGBW data converted by the RGB data is pre-correlated;
  • the BW sub-pixels enclosed by the squares correspond to the RGB data used by the RGB sub-pixels circled by the dotted boxes and correspond to the RGBW data converted from the RGB data.
  • FIG. 2 is a flow chart of a method of sub-pixel compensated coloring of an RGBW display device based on edge pixel detection, in accordance with an embodiment of the present invention.
  • each set of RGB data may include a luminance value of red R, a luminance value of green G, and a luminance value of blue B.
  • each set of RGBW data may include, for example, a luminance value of red R, a luminance value of green G, a luminance value of blue B, and a luminance value of white W.
  • the RG sub-pixels circled by the solid line frame correspond to the RGB data used by the RGB sub-pixels circled by the solid line frame and correspond to the RGBW data converted by the RGB data; the BW sub-framed by the dotted line box
  • the pixel corresponds to the RGB data used by the RGB sub-pixels circled by the dotted frame and the RGBW data to which the RGB data is converted. That is, the RGBW display device has m/2 groups of pixels, wherein each group of pixels includes an RG sub-pixel or a BW sub-pixel.
  • edge pixels are included in the nine-square pixel block of the RGBW display device based on the high-resolution RGB data; wherein the division of the nine-square pixel block is as shown in FIG.
  • the specific method for determining whether the edge pixels are included in the nine-square pixel block of the RGBW display device based on the high-resolution RGB data includes:
  • the matrix luminance values of any pixel in the Jiugong pixel block are calculated based on the Sobel operator in four directions and the high-resolution RGB data. Specifically, the Sobel operator based on the four directions uses Equation 1 to calculate the matrix luminance value of any pixel in the nine-square pixel block.
  • S d represents a Sobel operator in the d direction
  • d represents an angle
  • d can be 0°, 45°, 90°, and 135°
  • r represents R data corresponding to the nth pixel in the Jiugong pixel block
  • g represents It represents G data corresponding to the nth pixel in the Jiugong pixel block
  • b represents B data corresponding to the nth pixel in the Jiugong pixel block
  • L n represents the matrix luminance value of the nth pixel in the Jiugong pixel block.
  • the pixels in the nine-square pixel block corresponding to the maximum matrix luminance value are edge pixels.
  • operation 240 it is determined whether the saturated pixel is included in the nine-square pixel block based on the high-resolution RGB data.
  • a specific method for determining whether the nine-square pixel block includes a saturated pixel based on the high-resolution RGB data includes:
  • the maximum data value and the minimum data value in the RGB data corresponding to any pixel in the Jiugong pixel block are determined.
  • the maximum data value is divided by the minimum data value to obtain the data ratio.
  • the pixels in the nine-square pixel block corresponding to the data ratio are saturated pixels.
  • operation 250 is performed.
  • the center pixel (ie, the fifth pixel) in the Jiugong pixel block is subjected to filtering processing using the first filtering method based on the RGBW data.
  • the first filtering method is different depending on the position of the saturated pixel in the Jiugong pixel block.
  • the central pixel in the Jiugong pixel block is a saturated pixel
  • the second pixel is a saturated pixel
  • the sixth pixel is a saturated pixel
  • the eighth pixel is a saturated pixel
  • the fourth pixel is a saturated pixel
  • the fourth pixel is saturated pixels
  • the fourth pixel is saturated pixels
  • the seventh pixel are saturated pixels
  • the first pixel and the central pixel are saturated pixels
  • the third pixel and the central pixel a saturated pixel
  • the second pixel, the third pixel, and the fourth pixel are saturated pixels
  • the second pixel, the fourth pixel, and the seventh pixel are saturated pixels, or the second pixel, the third pixel, the fourth pixel, and the second pixel
  • Seven pixels are saturated pixels, or the first pixel, the fourth pixel, and the eighth pixel are saturated pixels, or the first pixel, the eighth pixel, and the ninth pixel, and the ninth
  • P5_C represents C data of the central pixel processed by the first filtering method
  • C4 represents C data corresponding to the fourth pixel that is not processed by the first filtering method
  • C5 represents the corresponding central pixel that is not processed by the first filtering method
  • C data represents C data corresponding to the sixth pixel processed without the first filtering method
  • C data is one of RGBW data.
  • the second pixel and the sixth pixel in the Jiugong pixel block are saturated pixels, or the sixth pixel and the eighth pixel are saturated pixels, or the sixth pixel, the seventh pixel, and the eighth pixel are saturated pixels, or the third pixel
  • the sixth pixel and the eighth pixel are saturated pixels, or the first pixel, the second pixel, the sixth pixel, and the ninth pixel are saturated pixels, or the third pixel, the sixth pixel, the seventh pixel, and the eighth pixel are saturated pixels
  • the second pixel, the sixth pixel, and the ninth pixel are saturated pixels, or the first pixel, the second pixel, and the sixth pixel are saturated pixels
  • the first filtering method based on the RGBW data is used to the Jiugong pixel block.
  • the center pixel is filtered
  • P5_C represents C data of the central pixel processed by the first filtering method
  • C4 represents C data corresponding to the fourth pixel not processed by the first filtering method
  • C5 represents that the first filtering method is not performed.
  • C6 represents the C data corresponding to the sixth pixel processed by the first filtering method
  • the C data is one of the RGBW data.
  • the first pixel, the center pixel, and the ninth pixel in the Jiugong pixel block are saturated pixels, or the third pixel, the center pixel, and the seventh pixel are saturated pixels, or the third pixel, the fourth pixel, and the center pixel are saturated pixels, Or the second pixel, the central pixel and the seventh pixel are saturated pixels, or the second pixel, the central pixel and the ninth pixel are saturated pixels, or the first pixel, the central pixel and the eighth pixel are saturated pixels, or the third pixel, The central pixel and the eighth pixel are saturated pixels, or the fourth pixel, the central pixel, and the ninth pixel are saturated pixels, and then the central pixel of the Jiugong pixel block is filtered by the first filtering method of Equation 4 based on the RGBW data.
  • P5_C represents C data of the central pixel processed by the first filtering method
  • C4 represents C data corresponding to the fourth pixel that is not processed by the first filtering method
  • C5 represents the corresponding central pixel that is not processed by the first filtering method
  • C data represents C data corresponding to the sixth pixel processed without the first filtering method
  • C data is one of RGBW data.
  • operation 260 is performed.
  • the central pixel in the Jiugong pixel block is subjected to filtering processing using the second filtering method based on the RGBW data.
  • the center pixel of the Jiugong pixel block is filtered by the second filtering method of Equation 5 (ie, using a diamond filter and a Gaussian difference filter) based on the RGBW data. .
  • P5_C P5_C1+P5_C2
  • P5_C1 1/8*C2+1/8*C4+1/16*C5+1/8*C6+1/8*C8
  • P5_C2 1/4*C5-1/16*(C1+C3+C7+C9)
  • P5_C represents C data of the central pixel processed by the second filtering method
  • C4 represents not C data corresponding to the fourth pixel processed by the second filtering method
  • C5 represents C data of the central pixel which is not processed by the second filtering method
  • C6 represents C data of the sixth pixel which is not processed by the second filtering method
  • C8 represents C data of the eighth pixel not processed by the second filtering method
  • C1 represents C data of the first pixel not processed by the second filtering method
  • C3 represents C data of the third pixel which is not processed by the second filtering method
  • C9 indicating C data of the ninth pixel which is not processed by the second filtering method
  • C data being one of the RGBW data.
  • operation 270 is performed.
  • non-edge pixels of the RGBW display device are processed using a minimized error feedback adaptive method.
  • FIG. 4 is a schematic diagram of processing non-edge pixels of an RGBW display device using a minimized error feedback adaptive method, in accordance with an embodiment of the present invention.
  • the R sub-pixel of pixel 2 which includes the RG sub-pixel
  • FIG. 4 is taken as an example.
  • R1_pre45 ⁇ 1R9+ ⁇ 2R10+ ⁇ 3R11+ ⁇ 4R12
  • R1_pre135 ⁇ 1R13+ ⁇ 2R14+ ⁇ 3R2+ ⁇ 4R3.
  • prediction error values R1_err45, R2_err45, R1_err135, and R2_err135 of the pixels 1 to 8 in both directions of 45°-135° are calculated.
  • R1_err45 R1-R1_pre45
  • R2_err45 R2–R2_pre45
  • R2_err135 R2–R2_pre135, .
  • K135 Sum_err45/(Sum_err45+Sum_err135)
  • the R data R2 of the R sub-pixel of the pixel 2 is mapped to the physical position of the R sub-pixel of the pixel 2 in FIG.
  • the RGBW display device performs display using the processed m sets of RGBW data.
  • the processed m sets of RGBW data include RGBW data processed by the first filtering method, RGBW data processed by the second filtering method, and RGBW data processed by the minimized error feedback adaptive method.
  • the sub-pixel compensation coloring method of the RGBW display device based on the edge pixel detection enables the low-resolution RGBW display device to display with high-resolution RGB data, and can be effective Eliminate color aliasing.

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Abstract

本发明公开一种基于边缘像素检测的RGBW显示装置的子像素补偿着色的方法，RGBW显示装置的RG子像素和BW子像素分别与一组高解析度RGB数据对应，该方法包括：接收m组高解析度RGB数据；将m组高解析度RGB数据转换为m组RGBW数据，其中，RGBW显示装置的RG子像素和BW子像素分别与一组RGBW数据对应；基于高解析度RGB数据判断RGBW显示装置的九宫像素块中是否包括边缘像素；如果九宫像素块中包括边缘像素，则基于高解析度RGB数据判断九宫像素块中是否包括饱和像素；如果九宫像素块中包括饱和像素，则基于RGBW数据利用第一滤波方法对九宫像素块中的中心像素进行滤波处理。本发明可使低解析度的RGBW显示装置利用高解析度的RGB数据进行显示，并能够有效地消除颜色混叠现象。

Description

基于边缘像素检测的RGBW显示装置的子像素补偿着色的方法 技术领域
本发明属于显示技术领域，具体地讲，涉及一种基于边缘像素检测的RGBW显示装置的子像素补偿着色的方法。
背景技术
在平板显示技术领域，尤其是在液晶显示技术领域，为了减小液晶显示器的工艺制造难度和，同时降低生产成本，往往采用在低物理解析度的液晶显示器上显示高物理解析度图像，并且要保证液晶显示器输出图像的空间分辨率和清晰度。
在现有技术中，亚像素采样(Sub-pixel Rendering)和亚像素复用两种技术能很好的提升液晶显示器输显示图像空间分辨率，但采用亚像素采样技术会导致液晶显示器显示高频信息时形成成图像混叠，而采用亚像素复用技术会导致液晶显示器显示图像的模糊。
发明内容
为了解决上述现有技术存在的问题，本发明公开一种基于边缘像素检测的RGBW显示装置的子像素补偿着色的方法，其中，所述RGBW显示装置的RG子像素和BW子像素分别与一组高解析度RGB数据对应，所述方法包括：接收m组高解析度RGB数据；将m组高解析度RGB数据转换为m组RGBW数据；其中，所述RGBW显示装置的RG子像素和BW子像素分别与一组RGBW数据对应；基于所述高解析度RGB数据判断RGBW显示装置的九宫像素块中是否包括边缘像素，其中，所述九宫像素块中的每个像素包括RG子像素或BW子像素；如果所述九宫像素块中包括边缘像素，则基于所述高解析度RGB数据判断所述九宫像素块中是否包括饱和像素；如果所述九宫像素块中包括饱和像素，则基于所述RGBW数据利用第一滤波方法对所述九宫像素块中的中心像素进行滤波处理。
进一步地，如果所述九宫像素块中不包括边缘像素，则基于所述RGBW数据利用最小化误差反馈自适应方法对所述RGBW显示装置的非边缘像素进行处理。
进一步地，如果所述九宫像素块中不包括饱和像素，则基于所述RGBW数据利用第二滤波方法对所述九宫像素块中的中心像素进行滤波处理。
进一步地，基于所述高解析度RGB数据判断九宫像素块中是否包括边缘像素的方法具体包括：基于若干个方向的索贝尔算子及所述高解析度RGB数据计算所述九宫像素块中任一像素的矩阵亮度值；确定最大矩阵亮度值；判断所述最大矩阵亮度值是否大于一预定门槛值；如果所述最大矩阵亮度值大于所述预定门槛值，则所述最大矩阵亮度值对应的所述九宫像素块中的像素为边缘像素。
进一步地，基于若干个方向的索贝尔算子及所述高解析度RGB数据利用式子1计算所述九宫像素块中任一像素的矩阵亮度值；
[式子1]
Ln＝Sd*(r g b)
其中，Ln表示所述九宫像素块中第n像素的矩阵亮度值，Sd表示d方向的索贝尔算子，d表示角度，r表示所述九宫像素块中第n像素对应的R数据，g表示表示所述九宫像素块中第n像素对应的G数据，b表示所述九宫像素块中第n像素对应的B数据。
进一步地，基于所述高解析度RGB数据判断所述九宫像素块中是否包括饱和像素的方法具体包括：确定所述九宫像素块中的任一像素对应的RGB数据中的最大数据值和最小数据值；利用所述最大数据值除以所述最小数据值，以获取数据比值；判断所述数据比值是否小于一预定阈值；如果所述数据比值不小于所述预定阈值，则所述数据比值对应的所述九宫像素块中的像素为饱和像素。
进一步地，所述第一滤波方法具体为：如果所述九宫像素块中的中心像素为饱和像素，或者第二像素为饱和像素，或者第六像素为饱和像素，或者第八 像素为饱和像素，或者第四像素为饱和像素，或者第四像素和第八像素为饱和像素，或者第二像素和第四像素为饱和像素，或者中心像素和第七像素为饱和像素，或者第一像素和中心像素为饱和像素，或者第三像素和中心像素为饱和像素，或者第二像素、第三像素和第四像素为饱和像素，或者第二像素、第四像素和第七像素为饱和像素，或者第二像素、第三像素、第四像素和第七像素为饱和像素，或者第一像素、第四像素和第八像素为饱和像素，或者第一像素、第四像素、第八像素和第九像素为饱和像素，或者第四像素、第八像素和第九像素为饱和像素，或者第一像素、中心像素和第六像素为饱和像素，则基于所述RGBW数据利用式子2对所述九宫像素块的中心像素进行滤波处理，
[式子2]
P5_C＝0*C4+1/2*C5+1/2*C6
其中，P5_C表示经所述第一滤波方法处理后的中心像素的C数据，C4表示未经所述第一滤波方法处理的第四像素对应的C数据，C5表示未经所述第一滤波方法处理的中心像素对应的C数据，C6表示未经所述第一滤波方法处理的第六像素对应的C数据，所述C数据为RGBW数据之一。
进一步地，所述第一滤波方法具体为：如果所述九宫像素块中的第二像素和第六像素为饱和像素，或者第六像素和第八像素为饱和像素，或者第六像素、第七像素和第八像素为饱和像素，或者第三像素、第六像素和第八像素为饱和像素，或者第一像素、第二像素、第六像素和第九像素为饱和像素，或者第三像素、第六像素、第七像素和第八像素为饱和像素，或者第二像素、第六像素和第九像素为饱和像素，或者第一像素、第二像素和第六像素为饱和像素，则基于所述RGBW数据利用式子3对所述九宫像素块的中心像素进行滤波处理，
[式子3]
P5_C＝0*C4+0*C5+1*C6
其中，P5_C表示经所述第一滤波方法处理后的中心像素对应的C数据，C4表示未经所述第一滤波方法处理的第四像素对应的C数据，C5表示未经所述第一滤波方法处理的中心像素对应的C数据，C6表示未经所述第一滤波方法处理的第六像素对应的C数据，所述C数据为RGBW数据之一。
进一步地，所述第一滤波方法具体为：如果所述九宫像素块中的第一像素、中心像素和第九像素为饱和像素，或者第三像素、中心像素和第七像素为饱和像素，或者第三像素、第四像素和中心像素为饱和像素，或者第二像素、中心像素和第七像素为饱和像素，或者第二像素、中心像素和第九像素为饱和像素，或者第一像素、中心像素和第八像素为饱和像素，或者第三像素、中心像素和第八像素为饱和像素，或者第四像素、中心像素和第九像素为饱和像素，则基于所述RGBW数据利用式子4对所述九宫像素块的中心像素进行滤波处理，
[式子4]
P5_C＝0*C4+1*C5+0*C6
其中，P5_C表示经所述第一滤波方法处理后的中心像素对应的C数据，C4表示未经所述第一滤波方法处理的第四像素对应的C数据，C5表示未经所述第一滤波方法处理的中心像素对应的C数据，C6表示未经所述第一滤波方法处理的第六像素对应的C数据，所述C数据为RGBW数据之一。
进一步地，所述第二滤波方法具体为：如果所述九宫像素块中不包括饱和像素，则基于所述RGBW数据利用式子5对所述九宫像素块的中心像素进行滤波处理，
[式子5]
P5_C＝1/8*C2+1/8*C4+1/16*C5+1/8*C6+1/8*C8+1/4*C5-1/16*(C1+C3+C7+C9)其中，P5_C表示经所述第二滤波方法处理后的中心像素的C数据，C4表示未经所述第二滤波方法处理的第四像素对应的C数据，C5表示未经所述第二滤波方法处理的中心像素对应的C数据，C6表示未经所述第二滤波方法处理的第六像素对应的C数据，C8表示未经所述第二滤波方法处理的第八像素对应的C数据，C1表示未经所述第二滤波方法处理的第一像素对应的C数据，C3表示未经所述第二滤波方法处理的第三像素对应的C数据，C7表示未经所述第二滤波方法处理的第七像素对应的C数据，C9表示未经所述第二滤波方法处理的第九像素对应的C数据，所述C数据为RGBW数据之一。
本发明的基于边缘像素检测的RGBW显示装置的子像素补偿着色的方法，可使低解析度的RGBW显示装置利用高解析度的RGB数据进行显示，并能够 有效地消除颜色混叠现象。
附图说明
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：
图1是根据本发明的具有低解析度的RGBW显示装置的各子像素的排列示意图以及作为对照的具有高解析度RGB显示装置的各子像素的排列示意图；
图2是根据本发明的实施例的基于边缘像素检测的RGBW显示装置的子像素补偿着色的方法的流程图；
图3是根据本发明的实施例的RGBW显示装置的九宫像素块划分示意图；
图4是根据本发明的实施例的利用最小化误差反馈自适应方法对RGBW显示装置的非边缘像素进行处理的示意图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。
本发明公开的是一种基于边缘像素检测的RGBW显示装置的子像素补偿着色的方法，其中，具有低解析度的显示装置(液晶显示装置或者有机发光二极管显示装置)可利用输入的高解析度RGB数据进行显示。
图1是根据本发明的具有低解析度的RGBW显示装置的各子像素(RGBW子像素)的排列示意图以及作为对照的具有高解析度RGB显示装置的各子像素(RGB子像素)的排列示意图。RGB显示装置的解析度与输入的RGB数据的解析度相同。
参照图1，在本发明中，RGBW显示装置的RG子像素和BW子像素分别与RGB显示装置的对应位置的RGB子像素对应，例如，实线方框圈起的RG 子像素与实线方框圈起的RGB子像素对应；虚线方框圈起的BW子像素与虚线方框圈起的RGB子像素对应。这里，所述的对应还可以理解为：实线方框圈起的RG子像素与实线方框圈起的RGB子像素所用的RGB数据对应以及预该RGB数据转换成的RGBW数据对应；虚线方框圈起的BW子像素与虚线方框圈起的RGB子像素所用的RGB数据对应以及与该RGB数据转换成的RGBW数据对应。
图2是根据本发明的实施例的基于边缘像素检测的RGBW显示装置的子像素补偿着色的方法的流程图。
参照图1和图2，在操作210中，接收m组高解析度RGB数据，其中，m为正整数。在本实施例中，每组RGB数据可包括红色R的亮度值、绿色G的亮度值及蓝色B的亮度值。
在操作220中，将m组高解析度RGB数据转换为m组RGBW数据。这里，每组RGBW数据可例如包括红色R的亮度值、绿色G的亮度值、蓝色B的亮度值及白色W的亮度值。诚如上述，实线方框圈起的RG子像素与实线方框圈起的RGB子像素所用的RGB数据对应以及与该RGB数据转换成的RGBW数据对应；虚线方框圈起的BW子像素与虚线方框圈起的RGB子像素所用的RGB数据对应以及该RGB数据转换成的RGBW数据对应。也就是说，RGBW显示装置具有m/2组像素，其中，每组像素包括RG子像素或者BW子像素。
在操作230中，基于高解析度RGB数据判断RGBW显示装置的九宫像素块中是否包括边缘像素；其中，所述九宫像素块的划分如图3所示。
这里，基于高解析度RGB数据判断RGBW显示装置的九宫像素块中是否包括边缘像素的具体方法包括：
基于四个方向的索贝尔算子及高解析度RGB数据计算九宫像素块中任一像素的矩阵亮度值。具体地，基于四个方向的索贝尔算子利用式子1计算九宫像素块中任一像素的矩阵亮度值。
[式子1]
Ln＝Sd*(r g b)
其中，Sd表示d方向的索贝尔算子，d表示角度，其中，d可为0°、45°、90°和135°，r表示九宫像素块中第n像素对应的R数据，g表示表示九宫像素块中第n像素对应的G数据，b表示九宫像素块中第n像素对应的B数据，Ln表示九宫像素块中第n像素的矩阵亮度值。
确定最大矩阵亮度值。具体地，确定九宫像素块中所有像素的矩阵亮度值中的最大矩阵亮度值。
判断该最大矩阵亮度值是否大于一预定门槛值。
如果该最大矩阵亮度值大于该预定门槛值，则该最大矩阵亮度值对应的九宫像素块中的像素为边缘像素。
如果九宫像素块中包括边缘像素，则进行操作240。在操作240中，基于高解析度RGB数据判断该九宫像素块中是否包括饱和像素。
这里，基于高解析度RGB数据判断该九宫像素块中是否包括饱和像素的具体方法包括：
确定九宫像素块中的任一像素对应的RGB数据中的最大数据值和最小数据值。
利用最大数据值除以最小数据值，以获取数据比值。
判断数据比值是否小于一预定阈值；
如果数据比值不小于预定阈值，则数据比值对应的九宫像素块中的像素为饱和像素。
如果该九宫像素块中包括饱和像素，则进行操作250。在操作250中，基于RGBW数据利用第一滤波方法对九宫像素块中的中心像素(即第五像素)进行滤波处理。
这里，根据九宫像素块中的饱和像素的位置不同，第一滤波方法不同。
具体地，如果九宫像素块中的中心像素为饱和像素，或者第二像素为饱和像素，或者第六像素为饱和像素，或者第八像素为饱和像素，或者第四像素为饱和像素，或者第四像素和第八像素为饱和像素，或者第二像素和第四像素为饱和像素，或者中心像素和第七像素为饱和像素，或者第一像素和中心像素为饱和像素，或者第三像素和中心像素为饱和像素，或者第二像素、第三像素和第四像素为饱和像素，或者第二像素、第四像素和第七像素为饱和像素，或者第二像素、第三像素、第四像素和第七像素为饱和像素，或者第一像素、第四像素和第八像素为饱和像素，或者第一像素、第四像素、第八像素和第九像素为饱和像素，或者第四像素、第八像素和第九像素为饱和像素，或者第一像素、中心像素和第六像素为饱和像素，则基于RGBW数据利用式子2的第一滤波方法对九宫像素块的中心像素进行滤波处理。
[式子2]
P5_C＝0*C4+1/2*C5+1/2*C6
其中，P5_C表示经第一滤波方法处理后的中心像素的C数据，C4表示未经第一滤波方法处理的第四像素对应的C数据，C5表示未经第一滤波方法处理的中心像素对应的C数据，C6表示未经第一滤波方法处理的第六像素对应的C数据，C数据为RGBW数据之一。
如果九宫像素块中的第二像素和第六像素为饱和像素，或者第六像素和第八像素为饱和像素，或者第六像素、第七像素和第八像素为饱和像素，或者第三像素、第六像素和第八像素为饱和像素，或者第一像素、第二像素、第六像素和第九像素为饱和像素，或者第三像素、第六像素、第七像素和第八像素为饱和像素，或者第二像素、第六像素和第九像素为饱和像素，或者第一像素、第二像素和第六像素为饱和像素，则基于RGBW数据利用式子3的第一滤波方法对九宫像素块的中心像素进行滤波处理，
[式子3]
P5_C＝0*C4+0*C5+1*C6
其中，P5_C表示经第一滤波方法处理后的中心像素的C数据，C4表示未经第一滤波方法处理的第四像素对应的C数据，C5表示未经第一滤波方法处 理的中心像素对应的C数据，C6表示未经第一滤波方法处理的第六像素对应的C数据，C数据为RGBW数据之一。
如果九宫像素块中的第一像素、中心像素和第九像素为饱和像素，或者第三像素、中心像素和第七像素为饱和像素，或者第三像素、第四像素和中心像素为饱和像素，或者第二像素、中心像素和第七像素为饱和像素，或者第二像素、中心像素和第九像素为饱和像素，或者第一像素、中心像素和第八像素为饱和像素，或者第三像素、中心像素和第八像素为饱和像素，或者第四像素、中心像素和第九像素为饱和像素，则基于RGBW数据利用式子4的第一滤波方法对九宫像素块的中心像素进行滤波处理，
[式子4]
P5_C＝0*C4+1*C5+0*C6
其中，P5_C表示经第一滤波方法处理后的中心像素的C数据，C4表示未经第一滤波方法处理的第四像素对应的C数据，C5表示未经第一滤波方法处理的中心像素对应的C数据，C6表示未经第一滤波方法处理的第六像素对应的C数据，C数据为RGBW数据之一。
如果该九宫像素块中不包括饱和像素，则进行操作260。在操作260中，则基于RGBW数据利用第二滤波方法对九宫像素块中的中心像素进行滤波处理。
具体地，如果九宫像素块中不包括饱和像素，则基于RGBW数据利用式子5的第二滤波方法(即采用钻石滤波器及高斯差分滤波器)对所述九宫像素块的中心像素进行滤波处理。
[式子5]
P5_C＝P5_C1+P5_C2
P5_C1＝1/8*C2+1/8*C4+1/16*C5+1/8*C6+1/8*C8
P5_C2＝1/4*C5-1/16*(C1+C3+C7+C9)
其中，P5_C表示经第二滤波方法处理后的中心像素的C数据，C4表示未 经第二滤波方法处理的第四像素对应的C数据，C5表示未经第二滤波方法处理的中心像素的C数据，C6表示未经第二滤波方法处理的第六像素的C数据，C8表示未经第二滤波方法处理的第八像素的C数据，C1表示未经第二滤波方法处理的第一像素的C数据，C3表示未经第二滤波方法处理的第三像素的C数据，C7表示未经第二滤波方法处理的第七像素的C数据，C9表示未经第二滤波方法处理的第九像素的C数据，C数据为RGBW数据之一。
如果九宫像素块中不包括边缘像素，则进行操作270。在操作270中，利用最小化误差反馈自适应方法对RGBW显示装置的非边缘像素进行处理。
由于最小化误差反馈自适应方法为现有技术的方法，在此仅作简单描述。图4是根据本发明的实施例的利用最小化误差反馈自适应方法对RGBW显示装置的非边缘像素进行处理的示意图。为了降低硬件资源，只考虑45°和135°两个方向进行误差反馈计算，现以图4中像素2(其包括RG子像素)的R子像素为例。
首先，待计算点45°-135°两方向的预测理论值(ɑ1,ɑ2,ɑ3,ɑ4为双立方插值系数)为：R45＝ɑ1R5+ɑ2R6+ɑ3R7+ɑ4R8，其中，R5、R6、R7、R8分别是图4中像素5、像素6、像素7、像素8位置对应的RGBW数据中的R数据；R135＝ɑ1R1+ɑ2R2+ɑ3R3+ɑ4R4，其中，R1、R2、R3、R4分别是图4中像素1、像素2、像素3、像素4位置对应的RGBW数据中的R数据。
接着，分别计算像素1至8在45°-135°两方向的预测理论值，分别为R1_pre45，R2_pre45，R3_pre45，R4_pre45，R5_pre45，R6_pre45，R7_pre45，R8_pre45，R1_pre135，R2_pre135，R3_pre135，R4_pre135，R5_pre135，R6_pre135，R7_pre135，R8_pre135。其中，例如，R1_pre45＝ɑ1R9+ɑ2R10+ɑ3R11+ɑ4R12，R1_pre135＝ɑ1R13+ɑ2R14+ɑ3R2+ɑ4R3。
接着，计算像素1至8在45°-135°两方向的预测误差值R1_err45、R2_err45、R1_err135和R2_err135。
其中，R1_err45＝R1-R1_pre45，R2_err45＝R2–R2_pre45，……；R1_err135＝R1–R1_pre135，R2_err135＝R2–R2_pre135，……。
接着，将45°-135°两方向的预测误差值求和，即：
Sum_err45＝|R1_err45|+|R2_err45|+|R3_err45|+……+|R8_err45|
Sum_err135＝|R1_err135|+|R2_err135|+|R3_err135|+……+|R8_err135|
接着，计算45°-135°两方向的权重分配系数，即：
K45＝Sum_err135/(Sum_err45+Sum_err135)
K135＝Sum_err45/(Sum_err45+Sum_err135)
接着，将权重分配系数乘以各自方向的预测理论值，最终计算出像素2的R子像素的R数据R2，即：R2＝K45*R45+K135*R135。
最后，像素2的R子像素的R数据R2映射到图4中像素2的R子像素的物理位置上。
RGBW显示装置利用经处理后的m组RGBW数据进行显示。这里，所述经处理后的m组RGBW数据包括经第一滤波方法处理的RGBW数据、经第二滤波方法处理的RGBW数据以及经最小化误差反馈自适应方法处理后的RGBW数据。
综上所述，根据本发明的实施例的基于边缘像素检测的RGBW显示装置的子像素补偿着色的方法，可使低解析度的RGBW显示装置利用高解析度的RGB数据进行显示，并能够有效地消除颜色混叠现象。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (14)

  1. 一种基于边缘像素检测的RGBW显示装置的子像素补偿着色的方法，其中，所述RGBW显示装置的RG子像素和BW子像素分别与一组高解析度RGB数据对应，其中，所述方法包括：
    接收m组高解析度RGB数据；
    将m组高解析度RGB数据转换为m组RGBW数据，其中，所述RGBW显示装置的RG子像素和BW子像素分别与一组RGBW数据对应；
    基于所述高解析度RGB数据判断RGBW显示装置的九宫像素块中是否包括边缘像素，其中，所述九宫像素块中的每个像素包括RG子像素或BW子像素；
    如果所述九宫像素块中包括边缘像素，则基于所述高解析度RGB数据判断所述九宫像素块中是否包括饱和像素；
    如果所述九宫像素块中包括饱和像素，则基于所述RGBW数据利用第一滤波方法对所述九宫像素块中的中心像素进行滤波处理。
  2. 根据权利要求1所述的方法，其中，如果所述九宫像素块中不包括边缘像素，则基于所述RGBW数据利用最小化误差反馈自适应方法对所述RGBW显示装置的非边缘像素进行处理。
  3. 根据权利要求1所述的方法，其中，如果所述九宫像素块中不包括饱和像素，则基于所述RGBW数据利用第二滤波方法对所述九宫像素块中的中心像素进行滤波处理。
  4. 根据权利要求1所述的方法，其中，基于所述高解析度RGB数据判断九宫像素块中是否包括边缘像素的方法具体包括：
    基于若干个方向的索贝尔算子及所述高解析度RGB数据计算所述九宫像素块中任一像素的矩阵亮度值；
    确定最大矩阵亮度值；
    判断所述最大矩阵亮度值是否大于一预定门槛值；
    如果所述最大矩阵亮度值大于所述预定门槛值，则所述最大矩阵亮度值对应的所述九宫像素块中的像素为边缘像素。
  5. 根据权利要求2所述的方法，其中，基于所述高解析度RGB数据判断九宫像素块中是否包括边缘像素的方法具体包括：
    基于若干个方向的索贝尔算子及所述高解析度RGB数据计算所述九宫像素块中任一像素的矩阵亮度值；
    确定最大矩阵亮度值；
    判断所述最大矩阵亮度值是否大于一预定门槛值；
    如果所述最大矩阵亮度值大于所述预定门槛值，则所述最大矩阵亮度值对应的所述九宫像素块中的像素为边缘像素。
  6. 根据权利要求3所述的方法，其中，基于所述高解析度RGB数据判断九宫像素块中是否包括边缘像素的方法具体包括：
    基于若干个方向的索贝尔算子及所述高解析度RGB数据计算所述九宫像素块中任一像素的矩阵亮度值；
    确定最大矩阵亮度值；
    判断所述最大矩阵亮度值是否大于一预定门槛值；
    如果所述最大矩阵亮度值大于所述预定门槛值，则所述最大矩阵亮度值对应的所述九宫像素块中的像素为边缘像素。
  7. 根据权利要求4所述的方法，其中，基于若干个方向的索贝尔算子及所述高解析度RGB数据利用式子1计算所述九宫像素块中任一像素的矩阵亮度值；
    [式子1]
    Ln＝Sd*(r g b)
    其中，Ln表示所述九宫像素块中第n像素的矩阵亮度值，Sd表示d方向的索贝尔算子，d表示角度，r表示所述九宫像素块中第n像素对应的R数据，g表示表示所述九宫像素块中第n像素对应的G数据，b表示所述九宫像素块中第n像素对应的B数据。
  8. 根据权利要求5所述的方法，其中，基于若干个方向的索贝尔算子及所述高解析度RGB数据利用式子1计算所述九宫像素块中任一像素的矩阵亮度值；
    [式子1]
    Ln＝Sd*(r g b)
    其中，Ln表示所述九宫像素块中第n像素的矩阵亮度值，Sd表示d方向的索贝尔算子，d表示角度，r表示所述九宫像素块中第n像素对应的R数据，g表示表示所述九宫像素块中第n像素对应的G数据，b表示所述九宫像素块中第n像素对应的B数据。
  9. 根据权利要求6所述的方法，其中，基于若干个方向的索贝尔算子及所述高解析度RGB数据利用式子1计算所述九宫像素块中任一像素的矩阵亮度值；
    [式子1]
    Ln＝Sd*(r g b)
    其中，Ln表示所述九宫像素块中第n像素的矩阵亮度值，Sd表示d方向的索贝尔算子，d表示角度，r表示所述九宫像素块中第n像素对应的R数据，g表示表示所述九宫像素块中第n像素对应的G数据，b表示所述九宫像素块中第n像素对应的B数据。
  10. 根据权利要求1所述的方法，其中，基于所述高解析度RGB数据判断所述九宫像素块中是否包括饱和像素的方法具体包括：
    确定所述九宫像素块中的任一像素对应的RGB数据中的最大数据值和最小数据值；
    利用所述最大数据值除以所述最小数据值，以获取数据比值；
    判断所述数据比值是否小于一预定阈值；
    如果所述数据比值不小于所述预定阈值，则所述数据比值对应的所述九宫像素块中的像素为饱和像素。
  11. 根据权利要求1所述的方法，其中，所述第一滤波方法具体为：
    如果所述九宫像素块中的中心像素为饱和像素，或者第二像素为饱和像素，或者第六像素为饱和像素，或者第八像素为饱和像素，或者第四像素为饱和像素，或者第四像素和第八像素为饱和像素，或者第二像素和第四像素为饱和像素，或者中心像素和第七像素为饱和像素，或者第一像素和中心像素为饱和像素，或者第三像素和中心像素为饱和像素，或者第二像素、第三像素和第四像素为饱和像素，或者第二像素、第四像素和第七像素为饱和像素，或者第二像素、第三像素、第四像素和第七像素为饱和像素，或者第一像素、第四像素和第八像素为饱和像素，或者第一像素、第四像素、第八像素和第九像素为饱和像素，或者第四像素、第八像素和第九像素为饱和像素，或者第一像素、中心像素和第六像素为饱和像素，则基于所述RGBW数据利用式子2对所述九宫像素块的中心像素进行滤波处理，
    [式子2]
    P5_C＝0*C4+1/2*C5+1/2*C6
    其中，P5_C表示经所述第一滤波方法处理后的中心像素的C数据，C4表示未经所述第一滤波方法处理的第四像素对应的C数据，C5表示未经所述第一滤波方法处理的中心像素对应的C数据，C6表示未经所述第一滤波方法处理的第六像素对应的C数据，所述C数据为RGBW数据之一。
  12. 根据权利要求1所述的方法，其中，所述第一滤波方法具体为：
    如果所述九宫像素块中的第二像素和第六像素为饱和像素，或者第六像素 和第八像素为饱和像素，或者第六像素、第七像素和第八像素为饱和像素，或者第三像素、第六像素和第八像素为饱和像素，或者第一像素、第二像素、第六像素和第九像素为饱和像素，或者第三像素、第六像素、第七像素和第八像素为饱和像素，或者第二像素、第六像素和第九像素为饱和像素，或者第一像素、第二像素和第六像素为饱和像素，则基于所述RGBW数据利用式子3对所述九宫像素块的中心像素进行滤波处理，
    [式子3]
    P5_C＝0*C4+0*C5+1*C6
    其中，P5_C表示经所述第一滤波方法处理后的中心像素对应的C数据，C4表示未经所述第一滤波方法处理的第四像素对应的C数据，C5表示未经所述第一滤波方法处理的中心像素对应的C数据，C6表示未经所述第一滤波方法处理的第六像素对应的C数据，所述C数据为RGBW数据之一。
  13. 根据权利要求1所述的方法，其中，所述第一滤波方法具体为：
    如果所述九宫像素块中的第一像素、中心像素和第九像素为饱和像素，或者第三像素、中心像素和第七像素为饱和像素，或者第三像素、第四像素和中心像素为饱和像素，或者第二像素、中心像素和第七像素为饱和像素，或者第二像素、中心像素和第九像素为饱和像素，或者第一像素、中心像素和第八像素为饱和像素，或者第三像素、中心像素和第八像素为饱和像素，或者第四像素、中心像素和第九像素为饱和像素，则利用式子4对所述九宫像素块的中心像素进行滤波处理，
    [式子4]
    P5_C＝0*C4+1*C5+0*C6
    其中，P5_C表示经所述第一滤波方法处理后的中心像素对应的C数据，C4表示未经所述第一滤波方法处理的第四像素对应的C数据，C5表示未经所述第一滤波方法处理的中心像素对应的C数据，C6表示未经所述第一滤波方法处理的第六像素对应的C数据，所述C数据为RGBW数据之一。
  14. 根据权利要求3所述的方法，其中，所述第二滤波方法具体为：
    如果所述九宫像素块中不包括饱和像素，则基于所述RGBW数据利用式子5对所述九宫像素块的中心像素进行滤波处理，
    [式子5]
    P5_C＝1/8*C2+1/8*C4+1/16*C5+1/8*C6+1/8*C8+1/4*C5-1/16*(C1+C3+C7+C9)
    其中，P5_C表示经所述第二滤波方法处理后的中心像素的C数据，C4表示未经所述第二滤波方法处理的第四像素对应的C数据，C5表示未经所述第二滤波方法处理的中心像素对应的C数据，C6表示未经所述第二滤波方法处理的第六像素对应的C数据，C8表示未经所述第二滤波方法处理的第八像素对应的C数据，C1表示未经所述第二滤波方法处理的第一像素对应的C数据，C3表示未经所述第二滤波方法处理的第三像素对应的C数据，C7表示未经所述第二滤波方法处理的第七像素对应的C数据，C9表示未经所述第二滤波方法处理的第九像素对应的C数据，所述C数据为RGBW数据之一。
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CN101996616A (zh) * 2009-08-24 2011-03-30 三星电子株式会社 利用基于对像素执行的测试的颜色坐标的权重进行子像素着色
CN102984527A (zh) * 2011-09-06 2013-03-20 索尼公司 图像处理装置、图像处理方法、信息记录介质和程序

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