Double exposure implementation method for inhomogeneous illumination image

An implementation method and technology of double exposure, applied in image enhancement, image data processing, instruments, etc., can solve problems such as algorithm robustness decline, enhancement results have a large impact, and visual effects are affected.
CN103530848AInactive Publication Date: 2014-01-22AIR FORCE UNIV PLA
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
AIR FORCE UNIV PLA
Publication Date
2014-01-22
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a double exposure implementation method for an inhomogeneous illumination image. The double exposure implementation method for the inhomogeneous illumination image comprises the following steps: obtaining an illumination image; obtaining a reflection image; overlaying the illumination image with the reflection image to obtain the global enhancement effect; fusing the global enhancement effect with the original image; and carrying out color correction on an enhancement result to obtain a visual matching image. According to the double exposure implementation method for the inhomogeneous illumination image, which is disclosed by the invention, the smooth property of the illumination image is constrained, and the reflection image is sharpened by the visual threshold value characteristic to guarantee the detail information of the image; with an image fusion method, the luminance, the contrast ratio and the color information of an original image luminance range can be effectively kept; because the characteristic of the human eye visual perception of average background brightness is introduced in, the fused image can be used for effectively eliminating image color distortion near a shadow boundary; the color of a low-illuminance zone is restored by the color correction technology; the colors of the low-illuminance zone and the luminance range are free from obvious distortion; the continuity is good; and the visual effect is more nature.
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Description

technical field

[0001] The invention belongs to the technical field of secondary exposure of images, and in particular relates to a method for realizing secondary exposure of images with non-uniform illumination. Background technique

[0002] At present, wide dynamic technology mainly uses special DSP (digital signal processing) circuits to expose the bright part with the most suitable shutter speed, and then expose the dark part with the most suitable shutter speed, and then recombine the two images through DSP processing , so that the bright part and the dark part can be seen clearly, which requires high technology to minimize the loss of color and clarity. However, due to the limitation of the characteristics of CCD, the wide dynamic range of the camera can reach 60dB at most, so even if the most advanced Advanced wide dynamic technology cameras will still obtain non-uniform illumination images under complex lighting conditions, resulting in the problem that the obtained ...

Claims

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