Dark channel prior based image defogging method
A dark primary color prior, image technology, applied in the field of image processing, can solve problems such as unreasonable assumptions, poor dehazing image quality, and dark dehazing images.
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[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0043] The present invention proposes a kind of effective defogging algorithm for haze image, and the steps of this method are as follows:
[0044] (1) Estimation of sky brightness by image segmentation based on classical clustering.
[0045] (2) Use the improved minimum filter to obtain the transmittance image of the haze image.
[0046] (3) The transmittance map is refined using guided filtering.
[0047] (4) Get the restored image.
[0048] The image segmentation method of classic clustering is:
[0049] (1) Convert the haze image from RGB space to LAB space;
[0050] (2) Carry out K-means classical clustering image segmentation based on A and B components;
[0051] (3) In order to prevent misestimation of the sky area, set the lower pixels to zero.
[0052]Combined with order statistical filtering, dark regions are corrected. Sequential statistical...
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