Backlight brightness processing method and system, backlight brightness adjustment method, storage medium

Patent metadata

Field	Value
Publication number	US-11398195-B2
Application number	US-201816473804-A
Country	US
Kind code	B2
Filing date	Oct 31, 2018
Priority date	Mar 19, 2018
Publication date	Jul 26, 2022
Grant date	Jul 26, 2022

Abstract

An image processing method, a backlight brightness adjustment method, an image processing system, and a computer readable storage medium are provided. The image processing method includes: acquiring a display image; dividing the display image to obtain one or more initial local regions; calculating an average brightness value of each of the one or more initial local regions respectively; acquiring an output image according to the average brightness value of each of the one or more initial local regions and the display image.

First claim

What is claimed is:

1. An image processing method, comprising:
acquiring a display image;
dividing the display image to obtain one or more initial local regions;
calculating an average brightness value of each of the one or more initial local regions respectively; and
acquiring an output image according to the average brightness value of each of the one or more initial local regions and the display image,
wherein acquiring the output image according to the average brightness value of each of the one or more initial local regions and the display image comprises:
creating a brightness pixel image according to a quantity of the one or more initial local regions;
storing the average brightness value of each of the one or more initial local regions in the brightness pixel image respectively; and
composing the brightness pixel image and the display image to obtain the output image,
wherein a texture type of the display image is a render texture type,
composing the brightness pixel image and the display image to obtain the output image comprises:
converting the texture type of the display image to obtain an intermediate display image, a texture type of the intermediate display image being a two-dimensional texture type;
acquiring an intermediate composite region of the intermediate display image; and
covering the brightness pixel image on the intermediate composite region to obtain the output image.

2. The image processing method according to claim 1 , wherein a size of the intermediate composite region is the same as a size of the brightness pixel image.

3. The image processing method according to claim 1 , wherein the brightness pixel image comprises one or more brightness pixels,
storing the one or more average brightness values in the brightness pixel image respectively comprises:
sequentially filling the one or more average brightness values into the one or more brightness pixels.

4. The image processing method according to claim 3 , wherein sequentially filling the one or more average brightness values into the one or more brightness pixels comprises:
taking the one or more average brightness values as grayscale values of respective sub-pixels of the one or more brightness pixels respectively, and sequentially filling the one or more average brightness values into the respective sub-pixels of the one or more brightness pixels.

5. The image processing method according to claim 1 , wherein
calculating one or more average brightness values of the one or more initial local regions respectively comprises:
converting the texture type of the display image to obtain an intermediate display image, a texture type of the intermediate display image being a two-dimensional texture type;
dividing the intermediate display image according to the display image and the one or more initial local regions to obtain one or more intermediate local regions of the intermediate display image, the one or more initial local regions being in one-to-one correspondence with the one or more intermediate local regions; and
calculating an intermediate average brightness value of each of the one or more intermediate local regions respectively, and the intermediate average brightness value of each of the one or more intermediate local regions being the average brightness value of each of the one or more initial local regions.

6. The image processing method according to claim 5 , wherein the intermediate display image comprises a plurality of intermediate pixels,
calculating the intermediate average brightness value of each of the one or more intermediate local regions respectively comprises:
acquiring intermediate pixel brightness values of respective intermediate pixels in each intermediate local region; and
calculating the intermediate average brightness value corresponding to each intermediate local region according to the intermediate pixel brightness values of the respective intermediate pixels in each intermediate local region.

7. The image processing method according to claim 6 , wherein each of the plurality of intermediate pixels comprises a red sub-pixel, a green sub-pixel, and a blue sub-pixel,
a calculation formula of the intermediate pixel brightness value corresponding to each of the plurality of intermediate pixels is:
L= 0.30× r+ 0.59× g+ 0.11× b,

where r represents a grayscale value of the red sub-pixel of each of the plurality of intermediate pixels, g represents a grayscale value of the green sub-pixel of each of the plurality of intermediate pixels, b represents a grayscale value of the blue sub-pixel of each of the plurality of intermediate pixels, and L represents the intermediate pixel brightness value corresponding to each of the plurality of intermediate pixels.

8. The image processing method according to claim 6 , wherein calculating the intermediate average brightness value corresponding to each intermediate local region according to the intermediate pixel brightness values of the respective intermediate pixels in each intermediate local region comprises:
averaging the intermediate pixel brightness values of all intermediate pixels in each intermediate local region to obtain the intermediate average brightness value corresponding to each intermediate local region; or
selecting N intermediate pixels in each intermediate local region, and
averaging the intermediate pixel brightness values of the N intermediate pixels selected in each intermediate local region to obtain the intermediate average brightness value corresponding to each intermediate local region, wherein N is a positive integer, and is less than a quantity of all intermediate pixels in each intermediate local region.

9. The image processing method according to claim 1 , wherein a size of each of the one or more initial local regions is variable.

10. A backlight brightness adjustment method, comprising:
in a rendering engine:
performing the image processing method according to claim 1 ;
in a display:
processing the output image by the display to obtain the average brightness value of each of the one or more initial local regions;
adjusting backlight brightness of the display according to the average brightness value of each of the one or more initial local regions; and
displaying the output image.

11. The backlight brightness adjustment method according to claim 10 , wherein the display is a virtual reality display or an augmented reality display.

12. The backlight brightness adjustment method according to claim 10 , wherein adjusting backlight brightness of the display according to the average brightness value of each of the one or more initial local regions comprising:
calculating a backlight brightness value corresponding to each of the one or more initial local regions according to the average brightness value of each of the one or more initial local regions; and
adjusting backlight brightness of the display according to the backlight brightness value corresponding to each of the one or more initial local regions.

13. An image processing system, comprising:
an image acquisition device, configured to acquire a display image;
a memory, configured to store non-transitory computer readable instructions;
a processor, configured to execute the non-transitory computer readable instructions, wherein when the non-transitory computer readable instructions are executed by the processor, the image processing method according to claim 1 is performed.

14. A non-transitory computer readable storage medium, used for storing non-transitory computer readable instructions, wherein when the non-transitory computer readable instructions a

Assignees

• Beijing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Wang Xuefeng
• Sun Yukun
• Miao Jinghua
• Chen Lili
• Zhang Hao
• Zhao Bin
• Wang Lixin
• Li Xi
• Suo Jianwen
• Li Wenyu
• Peng Jinbao
• Fan Qingwen
• Lu Yuanjie
• Liu Yali
• Wang Chenru
• Sun Jiankang

Classifications

• G09G5/10

  Intensity circuits · CPC title

• G09G2320/0646

  Modulation of illumination source brightness and image signal correlated to each other · CPC title

• G09G3/3426 Primary

  the different display panel areas being distributed in two dimensions, e.g. matrix · CPC title

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title

• G09G2360/16

  Calculation or use of calculated indices related to luminance levels in display data · CPC title