François Pinard wrote: > Maybe this would work? > > import Image > Image.open('yellow.bmp').convert('L').point(255*[0] + [255]) \ > .convert('1').save('yellow.bmp') footnote: in this specific case, you can point & convert in one operation. or in other words, point(255*[0] + [255]).convert('1') can be written as: point(255*[0] + [255], '1') </F>