Following up on an earlier thread back in March: http://www.jsoftware.com/pipermail/programming/2009-March/014134.html
If I run the following code on Windows XP or Ubuntu 9.04, I get no differences between the results for readimg & read_image for jpg or png files. If I run it on Windows 7, the png results are identical but reading a Jpeg image gives slightly different results. The images both look fine but the difference between the two isn't black. Is this just a result of a different interpretations of the lossy jpeg compression algorithm in Windows 7? Is this to be expected and "acceptable"? load 'media/image3 media/platimg viewmat' fnpng=: jpath '~addons/image3/hy_fly_di.png' fnjpg=: jpath '~addons/image3/atkiln.jpg' png1=: read_image fnpng NB. read image using image3 png2=: readimg fnpng NB. read same image using platimg png2 -: rgbmat_pplatimg_ png1 1 jpg1=: read_image fnjpg NB. read image using image3 jpg2=: readimg fnjpg NB. read same image using platimg jpg2 -: rgbmat_pplatimg_ jpg1 0 viewrgb jpg2 viewrgb rgbmat_pplatimg_ jpg1 viewrgb jpg2 - rgbmat_pplatimg_ jpg1 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
