Display method and display device, visible light communication transmission method and device

Patent metadata

Field	Value
Publication number	US-11069322-B2
Application number	US-201916634839-A
Country	US
Kind code	B2
Filing date	May 10, 2019
Priority date	Jun 29, 2018
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

The present disclosure is directed to a display method and a display device, a visible light communication transmission method and device, and a computer-readable storage medium. The display method includes: acquiring an image frame to be displayed and a corresponding binary code stream; adjusting a grayscale value of a corresponding pixel point in the image frame to be displayed based on a grayscale adjustment information set corresponding to each code element in the binary code stream, to obtain a first image frame and a second image frame that are different from the image frame to be displayed; and displaying the first image frame and the second image frame.

First claim

We claim:

1. A display method, comprising:
acquiring an image frame to be displayed and a corresponding binary code stream;
adjusting a grayscale value of a corresponding pixel point in the image frame to be displayed based on a grayscale adjustment information set corresponding to each code element in the binary code stream, to obtain a first image frame and a second image frame that are different from the image frame to be displayed; and
displaying the first image frame and the second image frame.

2. The display method according to claim 1 , wherein said adjusting the grayscale value of the corresponding pixel point in the image frame to be displayed based on the grayscale adjustment information set corresponding to each code element in the binary code stream to obtain the first image frame and the second image frame that are different from the image frame to be displayed comprises:
acquiring the grayscale adjustment information set corresponding to each code element, the grayscale adjustment information set comprising a first grayscale compensation value and a second grayscale compensation value; and
adjusting the grayscale value of each pixel point in the image frame to be displayed according to the first grayscale compensation value to obtain the first image frame, and adjusting the grayscale value of each pixel point in the image frame to be displayed according to the second grayscale compensation value to obtain the second image frame.

3. The display method according to claim 2 , wherein said adjusting the grayscale value of each pixel point in the image frame to be displayed according to the first grayscale compensation value to obtain the first image frame comprises:
calculating, for each pixel point in the image frame to be displayed, an algebraic sum of the grayscale value of the pixel point and the first grayscale compensation value; and
determining the algebraic sum as a grayscale value of the corresponding pixel point in the first image frame;
or,
said adjusting the grayscale value of each pixel in the image frame to be displayed according to the second grayscale compensation value to obtain the second image frame comprises:
calculating, for each pixel point in the image frame to be displayed, an algebraic sum of the grayscale value of each pixel point and the second grayscale compensation value; and
determining the algebraic sum as a grayscale value of the corresponding pixel point in the second image frame.

4. The display method according to claim 3 , wherein prior to adjusting the grayscale value of the corresponding pixel point in the image frame to be displayed based on the grayscale adjustment information set corresponding to each code element in the binary code stream, the method further comprises:
compressing the grayscale of each pixel point in the image frame to be displayed according to a preset grayscale compression formula.

5. The display method according to claim 3 , wherein said adjusting the grayscale value of the corresponding pixel point in the image frame to be displayed based on the grayscale adjustment information set corresponding to each code element in the binary code stream comprises:
in response to determining that the pixel point comprises M 1 sub-pixels, adjusting grayscale values of M 2 sub-pixels in the M 1 sub-pixels, where M 1 is a positive integer greater than or equal to 3, and M 2 is a positive integer less than or equal to M 1 .

6. The display method according to claim 1 , wherein when the image frame to be displayed is divided into Z regions where Z is a positive integer, prior to adjusting the grayscale value of the corresponding pixel point in the image frame to be displayed based on the grayscale adjustment information set corresponding to each code element in the binary code stream, the method further comprises:
determining a region where the pixel point corresponding to each code element in the binary code stream is located, the region where the pixel point corresponding to each code element is located being one of the Z regions; and
determining a grayscale adjustment information set corresponding to the region as the grayscale adjustment information set corresponding to the code element, based on a corresponding relationship between regions and grayscale adjustment information sets.

7. The display method according to claim 6 , wherein the first grayscale compensation values in the grayscale adjustment information sets corresponding to different regions in the image frame to be displayed are different, and/or the second grayscale compensation values in the grayscale adjustment information sets corresponding to different regions in the image frame to be displayed are different.

8. The display method according to claim 7 , wherein the first grayscale compensation value is a positive number, and the second grayscale compensation value is a negative number.

9. The display method according to claim 7 , wherein the first grayscale compensation value and the second grayscale compensation value are mutually opposite numbers.

10. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the program, when executed by a processor, performs the steps of the method according claim 1 .

11. A visible light communication transmission method, comprising:
acquiring two image frames from a video stream, wherein corresponding pixel points in the two image frames are identical except for grayscale values of the corresponding pixel points;
acquiring a grayscale amplitude image from the two image frames;
acquiring a binary code stream according to the grayscale amplitude image, based on a corresponding relationship between grayscale amplitudes and code elements;
determining content needed to be rendered based on the binary code stream; and
outputting the content needed to be rendered.

12. The visible light communication transmission method according to claim 11 , wherein prior to acquiring the binary code stream according to the grayscale amplitude image, the method further comprises:
dividing the grayscale amplitude image into Z regions according to a criterion that the grayscale amplitude variation amount is the same within a region, where Z is a positive integer;
wherein said acquiring the binary code stream according to the grayscale amplitude image based on the corresponding relationship between grayscale amplitudes and code elements comprises:
acquiring a binary code stream corresponding to at least one of the Z regions of the grayscale amplitude image, based on the corresponding relationship between grayscale amplitudes and code elements.

13. The visible light communication transmission method according to claim 12 , wherein prior to acquiring the binary code stream corresponding to the at least one of the Z regions of the grayscale amplitude image based on the corresponding relationship between grayscale amplitudes and code elements, the method comprises:
acquiring historical data stored locally;
determining behavior preference characteristics of a target object based on the historical data; and
determining a region corresponding to the behavior preference characteristics based on a corresponding relationship between behavior preference characteristics and grayscale amplitudes;
wherein said acquiring the binary code stream corresponding to the at least one of the Z regions of the grayscale amplitude image comprises:
acquiring a binary code stream of the region of the grayscale amplitude image corresponding to the behavior preference characteristics.

14. A visible light communication transmission device, comprising:
a

Assignees

• Boe Technology Group Co Ltd

Inventors

• Liu Kairan
• Li Yingyi

Classifications

• G06T11/10

  Texturing; Colouring; Generation of textures or colours (retouching, inpainting or scratch removal G06T5/77) · CPC title

• H04B10/116 Primary

  Visible light communication · CPC title

• G09G2320/0646

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

• G09G2360/16

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

• G09G2320/0233

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