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Method for compensating backlight

A compensation method and backlight technology, applied in the field of backlight compensation, to achieve the effect of clear subject, proper exposure, and low system performance requirements

Active Publication Date: 2013-06-05
SHENZHEN ADVANCE RIVER SYST TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a backlight compensation method and its device to solve the problem of insufficient exposure of the subject and partial exposure of the background in the prior art in a backlight environment. Excessive technical problems, and has the advantage of not requiring high system performance

Method used

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  • Method for compensating backlight
  • Method for compensating backlight
  • Method for compensating backlight

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Embodiment Construction

[0037] see first figure 1 , figure 1 is a flow chart of the backlight compensation method according to the first embodiment of the present invention.

[0038] like figure 1 As mentioned above, the backlight compensation method according to the first embodiment of the present invention includes the following steps:

[0039] Step 101, performing normal exposure processing to obtain an image to be processed.

[0040] Step 102, detecting whether the subject is in a backlight environment.

[0041] Step 103: When it is detected that the subject is in a backlit environment, the incremental exposure time is obtained, and according to the incremental exposure time, the gray value of the pixel in the dark area is positively incremented, and the gray value of the pixel in the bright area is processed Negative values ​​increment processing to obtain the target image.

[0042] In this embodiment, step 101 is first used to pre-acquire images, and step 102 is used to determine whethe...

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Abstract

The invention discloses a backlight compensation method, which comprises the following steps: performing normal exposure processing to obtain an image to be processed; detecting whether the subject in the image to be processed is in a backlight environment; Exposure time, according to the incremental exposure time, the gray value of the pixel in the dark area is processed with a positive value increment, and the gray value of the pixel in the bright area is processed with a negative value increment to obtain the target image. Through the above method, the technical solution provided by the present invention obtains the incremental exposure time to respectively perform positive incremental processing on the pixel gray value in the dark area, and perform negative incremental processing on the pixel gray value in the bright area, so that The subject is backlight compensated, so that the exposure of the subject in the image captured by the shooting device in the backlight environment is appropriate, and the subject in the picture is clear. In addition, since there is no need to use different compensation functions for backlight compensation, it is more effective. The advantage of not requiring high system performance.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a backlight compensation method. Background technique [0002] In the daily use of shooting equipment such as cameras, it is often encountered that the subject is in a backlight (ie backlight) state. When the subject is in a backlight state, due to a large amount of light entering the photosensitive array of the shooting device Therefore, the image acquired by the photographing device has the problem of underexposure of the subject and overexposure of the background. [0003] In the backlight compensation processing method of the prior art, the histogram of the image to be processed is first obtained, so as to judge whether the image to be processed needs backlight compensation according to the histogram. Cutoff value, according to the above two brightness cutoff values, the brightness range of the pixel is determined, and different compensation functions are used for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/235
Inventor 陈冠波
Owner SHENZHEN ADVANCE RIVER SYST TECH CO LTD
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