He's Dark Channel Prior

Dark Channel Prior

"The dark channel prior is based on following observation on outdoor haze-free images: In most of the non-sky patches, at least one color channel has some pixels whose intensity are very low and close to zero. Equivalently, the minimum intensity in such a patch is close to zero."

The definition of dark channel:

where omage(x) means a small patch of the image. From the dark channel prior, we can suppose that:

Estimating Transmission Map Using Dark Channel Prior

Dark channel is extremely useful for estimating the transmission map.


More details can be seen in the original paper, which is listed below.
You can also download the original Matlab code, which is provided by the author of this paper.

dark_channel_definition.png View (4.34 KB) 汪 清, 11/06/2015 01:21 PM

dark_channel_definition_2.png View (1.27 KB) 汪 清, 11/06/2015 01:21 PM

dark_channel.png View (57.9 KB) 汪 清, 11/06/2015 01:23 PM (7.2 KB) 汪 清, 11/06/2015 01:37 PM

single_image_haze_removal_using_dark_channel_prior.pdf (6.65 MB) 汪 清, 11/06/2015 01:39 PM