Rodrigo Cunha on wrote... | Hi! | | I was trying to simulate chromatic aberration using the following command: | | convert -channel Red -affine 0.9,0,0,0.9,0,0 -transform -channel Blue | -affine 1.1,0,0,1.1,0,0 -transform +channel -resize 800x600 -quality 90 | -sampling-factor 1x1 input.jpg output.jpg | | The idea being that by scaling each channel separately (and not scaling | green) I could emulate (or correct a lens) chromatic aberration. | | The results are nil thought... what's wrong with my command?
I do not think -affine understands -channel settings. would be supprised if it did as it does interpolation of colors to generate new pixels that would in the old image fall between pixels. I think you would be better off separating each RGB channel (using -separate) adjusting the size of the images, and cropping them so they are all the same size, then -combine them back together again. See Channels http://www.cit.gu.edu.au/~anthony/graphics/imagick6/channels/ Anthony Thyssen ( System Programmer ) <[EMAIL PROTECTED]> ----------------------------------------------------------------------------- No one ever listens to Zatheris. "Quite Mad!", thay say. It is good the Zatheris does not mind. He has even grown to like it. Oh yes! -- Zatheris's Mumbling, Bablyon 5, "War Without End" ----------------------------------------------------------------------------- Anthony's Home is his Castle http://www.cit.gu.edu.au/~anthony/ _______________________________________________ Magick-users mailing list [email protected] http://studio.imagemagick.org/mailman/listinfo/magick-users
