Hello,
i tried the example bm3d_image_denoising.cpp with a grayscale picture in pgm format. The result is strange and has artifacts: there are lines visibile. I don't know what is wrong.
I started the program with the parameters ./bm3d_image_denoising -i=sample.pgm -sigma=55 -o=sample_out.pgm
I know the sigma is high but the problem is still visible for sigma 10 or 15 (but not so good). I sharpened the image and marked the lines with red arrow. Can someone help?