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Method for compensating backlight

A compensation method and backlight technology, applied in the field of backlight compensation, can solve the problems of insufficient exposure of the subject, low system performance requirements, overexposure of the background part, etc., and achieve the effect of suitable exposure, low system performance requirements, and clear subject.

Active Publication Date: 2011-11-09
SHENZHEN ADVANCE RIVER SYST TECH CO LTD
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  • Claims
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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

Examples

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Embodiment Construction

[0035] see first figure 1 , figure 1 is a flow chart of the backlight compensation method according to the first embodiment of the present invention.

[0036] like figure 1 As mentioned above, the backlight compensation method according to the first embodiment of the present invention includes the following steps:

[0037] Step 101, performing normal exposure processing to obtain an image to be processed.

[0038] Step 102, detecting whether the subject is in a backlight environment.

[0039] 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.

[0040] In this embodiment, step 101 is first used to pre-acquire images, and step 102 is used to determine whether t...

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Abstract

The invention discloses a method for compensating a backlight, comprising the following steps of: carrying out normal exposure to obtain an image to be processed; detecting whether a shooting subject in the image to be processed is located in a backlight environment; if the shooting subject is located in the backlight environment to obtain increment of the exposure time; and according to the increment of the exposure time, carrying out positive value incrementation processing on a pixel gray value in a dark space and negative value incrementation processing on the pixel gray value in a brightspace to obtain a target image. By adopting the manner, in the technical scheme provided by the invention, the increment of the exposure time is acquired to respectively carry out the positive value incrementation processing on the pixel gray value in the dark space and the negative value incrementation processing on the pixel gray value in the bright space, and backlight compensation is realizedon the shooting subject, thus the shooting subject in the image acquired by a shooting device in the backlight environment is appropriately exposed, and the shooting subject in a picture is clear; besides, different compensation functions are not required to carry out backlight compensation, thus the method disclosed by the invention has the advantage of low system performance requirement.

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 b...

Claims

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Application Information

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