So I posted this picture at a flickr group called Perfect Panoramas - 2000 x 600 minimum, no borders, no signature.
and the admin reject my picture because the "jpeg compression is excessive and obtrusive (file size in bytes should be larger). finally, the image would look much better if you fixed the chromatic aberration. " quoted by the admin.
Does anyone teach me how to do it or got a website that I can read.?