I have a very large number of scanned textual grayscale images where I want to make the background white rather than a range of white to gray (due to paper bends and other variations) as well as to darken the black text a bit. (It would be far too labor-intensive to manually adjust each image, one by one, with photo editing software.)
Does anyone know if there is any J code or (preferably) a J control where one can easily adjust the white point and black point on the histogram of an image, seeing the image display change as the values are changed? (The white point is where every value from there upward to the maximum is converted to white, and, conversely, the black point is where every value from there downward to the minimum is converted to black.) I didn't see anything like this in Cliff Reiter's book, although he does work a little with image histograms. It would be even nicer if this could be also scripted in some way to automatically go through a series of images using two predetermined values. Thanks in advance! Harvey ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
