> When converting to a bilevel image (mode "1"), the source image > is first converted to black and white. Resulting values larger than
I think it would be clearer to say "the source image is first converted to grayscale." > Resulting values larger than > 127 are then set to white, and the image is dithered. To use other > thresholds, use the point method. This doesn't make sense to me. If I take a four-color block, the four colors having luminance values of 0, 33%, 66%, and 100%, the above process would give me an image which is half gray (actually, black) and half white, with some dithering on the gray half. Instead, I get four carefully delineated blocks, two of which are dithered gray, one of which is white, and one of which is black. I think it makes more sense to say, "the image is dithered to bitonal black and white using the Floyd-Steinberg error diffusion filter and a threshold value of 127." Bill _______________________________________________ Image-SIG maillist - [email protected] http://mail.python.org/mailman/listinfo/image-sig
