Method and device for image restoration

An image and original image technology, applied in the field of image restoration methods and devices, can solve problems such as overexposure

Active Publication Date: 2017-11-21
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for image restoration to effectively solve the problem of overexposure when a camera shoots a red area

Method used

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  • Method and device for image restoration
  • Method and device for image restoration

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Embodiment Construction

[0016] Embodiments of the present invention provide a method and device for image restoration. First, in the red area within the set area of ​​the original image data output by the sensor, when there is a red channel value greater than the preset value within the set area around the green channel pixel When the red channel pixel of the red channel threshold is determined, it is determined that the green channel pixel needs overexposure repair, and then the green channel pixel is repaired according to the blue channel value of the blue channel pixel within the set range around it, Since the red channel value of the red channel pixel within the set range around the green channel pixel is judged to be greater than the preset red channel threshold, it is judged that the green channel pixel needs overexposure repair, and the overexposed area can be determined more accurately, and according to The blue channel value of the blue channel pixels within the set range around the green cha...

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Abstract

The embodiments of the present invention provide an image restoration method and device, which relate to the camera development technology. In the red area in the set area of ​​the original image data output by the sensor, when there is a red channel value in the set range around the green channel pixel point When the red channel pixel is larger than the preset red channel threshold, it is determined that the green channel pixel needs overexposure repair, so as to more accurately determine the area that needs overexposure repair, and then according to the blue color within the set range around it. The blue channel value of the channel pixel is repaired to the green channel pixel, which can better solve the problem of overexposure, and the repaired image is more natural, thus effectively solving the problem of overexposure when the camera shoots the red area.

Description

technical field [0001] The invention relates to camera development technology, in particular to an image restoration method and device. Background technique [0002] When shooting with a camera, the red area in the real scene is often displayed as yellow or even white in the image captured by the camera due to overexposure. The raw image data output by the sensor inside the camera is as follows figure 1 The original image data in Bayer format is shown, and each pixel has only a single color channel value. The pixels with only green channel values ​​can be called green channel pixels, and the pixels with only red channel values ​​can be called It is called a red channel pixel, and a pixel with only a blue channel value is called a blue channel pixel. In the figure, G represents green, B represents blue, and R represents red. When shooting the red area in the real scene, when the red channel pixel value of the red channel pixel in the red area in the raw image data output by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/359H04N9/04
Inventor 程敏张兴明傅利泉朱江明吴军吴坚
Owner ZHEJIANG DAHUA TECH CO LTD
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