Method for real-time restoration of fog-degraded image with white balance correction
A technology for degrading images and white balance. It is applied in image enhancement, image data processing, instruments, etc. It can solve the problems of complex algorithm, color shift, and inability to realize the DSP running platform, so as to reduce the complexity of the estimation algorithm and reduce the calculation effect of times
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[0021] Specific implementation mode 1. Combination figure 1 Describe this embodiment, the method for real-time restoration of degraded images in foggy days with white balance correction, the method is implemented by the following steps:
[0022] Step A. Normalize the original degraded image in foggy weather with the atmospheric background and extract its minimum channel image. The value range of the normalized minimum channel image needs to be corrected to [0,1].
[0023] Step B. Obtain the dark channel image of the minimum channel image by using a statistical filtering method on the minimum channel image. The value range of the dark channel image is [0,1]; in the process of performing statistical filtering, a statistical fast filtering method with O(n) complexity is used.
[0024] Step C. According to the atmospheric optical imaging model, the dark channel image is used to obtain the transmission parameter image of the original degraded image in foggy weather.
[0025] Step...
specific Embodiment approach 2
[0046] Specific embodiment two, combine Figure 1 to Figure 5 This implementation mode is described. This implementation mode is a specific example of the method for real-time restoration of a foggy degraded image with white balance correction described in the first specific implementation mode:
[0047] Take the degraded RGB color image restoration as an example, see the original image image 3 (a),
[0048] 1. For the degraded images of exterior foggy days, the atmospheric optical model can express the degraded process of foggy weather images with the following formula.
[0049] O i (x,y)=J i (x,y)t(x,y)+A i (1-t(x,y)), i∈{R,G,B}
[0050] In this optical model, O(x,y) represents the input image; J(x,y) represents the undegraded original scene information at the scene; t(x,y) is the transmission parameter image of the medium (scene depth information image ), which is considered to have a common transmission parameter image in the RGB three-color space; A represents atmo...
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