Hi - I'm new to ImageMagick and am looking to convert color photographs to B&W. I tried a simple experiment converting a color image to B&W using the -colorspace Gray method. Then I took the same image and converted to Grayscale (image->mode->grayscale) in the GIMP and compared the two converted images. The results were drastically different. The IM image was much darker with the histogram weighted heavily to the left. The GIMP image was much lighter with the histogram weighted more to the right. I tried this with several images and the results were consistent.
I'm trying to understand how IM converts color to B&W. It doesn't appear to be a monochrome channel mix of RGB 30-60-10 which I think is what the GIMP grayscale is using. If anyone can help with this topic of color to B&W conversion would be appreciated. Best Regards - Fred _______________________________________________ Magick-users mailing list [email protected] http://studio.imagemagick.org/mailman/listinfo/magick-users
