Method, apparatus, and system for adjusting white balance data

Patent metadata

Field	Value
Publication number	US-9288460-B2
Application number	US-201314361342-A
Country	US
Kind code	B2
Filing date	Dec 13, 2013
Priority date	Aug 8, 2013
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

A method provided by this disclosure for adjusting white balance data may comprise: reading a first white balance data of an image of a target signal source; performing a first adjustment operation such that the first white balance data complies with a predetermined target value and a second white balance data is generated; sending the second white balance data to signal source channels except the target signal source; and performing a second adjustment operation, wherein the second adjustment operation is a second adjustment performed on a third white balance data of the signal source channels according to the second white balance data.

First claim

What is claimed is:

1. A method for adjusting white balance data, comprising:
reading only a first white balance data of an image of a certain target signal source, without reading white balance data of other signal sources other than the certain target signal source;
performing a first adjustment operation such that the first white balance data complies with a predetermined target value and a second white balance data is generated;
sending the second white balance data to signal source channels of the other signal sources except the certain target signal source; and
performing a second adjustment operation, wherein the second adjustment operation is a second adjustment performed on a third white balance data of the signal source channels of the other signal sources according to the second white balance data,
wherein the performing of a first adjustment operation comprises:
comparing the predetermined target value with the first white balance data to acquire a comparison result; and
when the comparison result indicates that the first white balance data does not comply with the predetermined target value, adjusting source data in the first white balance data such that the target data in the first white balance data falls within a range of the predetermined target value.

2. The method according to claim 1 , wherein the adjusting source data in the first white balance data comprises:
comparing color coordinates in the first white balance data with the predetermined target value;
when the color coordinates are smaller than the predetermined target value, modifying a red gain or a green gain in the source data; and
re-reading the color coordinates, and determining whether the color coordinates fall within the range of the predetermined target value, if no, modifying a blue gain in the source data to ensure that the color coordinates are adjusted as within the range of the predetermined target value.

3. The method according to claim 1 , wherein the performing a second adjustment on a third white balance data of the signal source channels according to the second white balance data comprises:
checking automatically whether the second white balance data is duplicated to the signal source channels, and if there is a channel to which the second white balance data has not yet been duplicated, duplicating the second white balance data to the channel.

4. The method according to claim 1 , wherein the image of the target signal source is an image having a predetermined pure whiteness given by a signal generator; and color coordinates (x, y), a color temperature T, a luminance L V , and a color difference Δuv are read out by using a color analyzer.

5. The method according to claim 1 , wherein the signal source channels except the target signal source are configured to adjust white balance data on the basis of a single channel.

6. The method according to claim 5 , wherein the adjusted white balance data is duplicated after the white balance data is input into the single channel, so as to duplicate the adjusted white balance data into all the signal source channels except the current channel by means of the duplication operations, such that white balance data of all the signal sources are adjusted.

7. The method according to claim 5 , wherein the single channel is a video graphics array (VGA) channel.

8. An apparatus for adjusting white balance data, comprising:
a storage device configured to store computer programs;
a processor configured to be coupled with the storage device,
wherein the processor, when calling and executing the computer programs stored in the storage device, is configured to achieve the following units:
a reading module configured to read only a first white balance data of an image of a certain target signal source, without reading white balance data of other signal sources other than the certain target signal source;
a first performing module configured to perform a first adjustment operation such that the first white balance data complies with a predetermined target value and a second white balance data is generated;
a sending module configured to send the second white balance data to signal source channels of the other signal sources except the certain target signal source; and
a second performing module configured to perform a second adjustment operation, wherein the second adjustment operation is a second adjustment performed on a third white balance data of the signal source channels of the other signal sources according to the second white balance data,
wherein the first performing module comprises:
a first comparing module configured to compare the predetermined target value with the first white balance data to acquire a comparison result; and
a first adjusting module configured to, when the comparison result indicates that the first white balance data does not comply with the predetermined target value, adjust source data in the first white balance data such that the target data in the first white balance data falls within a range of the predetermined target value.

9. The apparatus according to claim 8 , wherein the first adjusting module comprises:
a second comparing module configured to compare color coordinates in the first white balance data with the predetermined target value;
a first modifying module configured to, when the color coordinates are smaller than the predetermined target value, modify a red gain or a green gain in the source data; and
a second modifying module configured to, re-read the color coordinates, and determine whether the color coordinates fall within the range of the predetermined target value, and if no, modify a blue gain in the source data to ensure that the color coordinates are adjusted as within the range of the predetermined target value.

10. The apparatus according to claim 8 , wherein the second performing module comprises:
an automatic checking module configured to automatically check whether the second white balance data is duplicated to the signal source channels, and if there is a channel to which the second white balance data has not yet been duplicated, duplicate the second white balance data to the channel.

11. The apparatus according to claim 8 , wherein the image of the target signal source is an image having a predetermined pure whiteness given by a signal generator; and color coordinates (x, y), a color temperature T, a luminance L V , and a color difference Δuv are read out by using a color analyzer.

12. The apparatus according to claim 8 , wherein the signal source channels except the target signal source are configured to adjust white balance data on the basis of a single channel.

13. The apparatus according to claim 12 , wherein the adjusted white balance data is duplicated after the white balance data is input into the single channel, so as to duplicate the adjusted white balance data into all the signal source channels except the current channel by means of the duplication operations, such that white balance data of all the signal sources are adjusted.

14. The apparatus according to claim 12 , wherein the single channel is a video graphics array (VGA) channel.

15. A system for adjusting white balance data, comprising:
a signal generating device coupled to a television and configured to control, according to a predetermined pure whiteness, the television to present an image of a target signal source;
a color analyzing device coupled to the television and configured to read out white balance data of the target signal source according to the image; and
an apparatus for adjusting white balance data separately coupled to the sig

Assignees

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

Inventors

• Lin Yang

Classifications

• G06T11/10

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

• H04N9/73 Primary

  Colour balance circuits, e.g. white balance circuits or colour temperature control (camera processing pipelines for colour balance H04N23/88) · CPC title

• H04N23/88 Primary

  for colour balance, e.g. white-balance circuits or colour temperature control · CPC title

• G06T7/408

  Physics · mapped topic

• H04N9/735

  Electricity · mapped topic