[ximgproc] anisotropicDiffusion bugs

opencv / opencv_contrib

Repository for OpenCV's extra modules

Apache License 2.0

9.33k stars 5.75k forks source link

[ximgproc] anisotropicDiffusion bugs #1573

Open emptyVoid opened 6 years ago

emptyVoid commented 6 years ago

System information (version)

OpenCV => 3.4.1
Operating System / Platform => Windows 64 Bit
Compiler => Visual Studio 2017

Detailed description

exptab vector is incomplete (no value for 255*3)
copyMakeBorder works on the first iteration only (without BORDER_ISOLATED flag it leaves the uninitialized border region intact).

sav-chris commented 4 years ago

The diffusion method also does not support both equations for c(x, y, t) mentioned in Perona and Malik's paper. So far the algorithm only supports CV_8UC3. Perhaps these are more limitations than bugs.