1. a method of controlling contrast in digital printing comprising: (a) scanning the document to be copied and printed and generating a digital image thereof; (b) rasterizing the digital image and mapping the pixel count and values on a scale between the black point and the white point range of pixel values for the image; (c) performing a linear transformation of the mapped values over said range; and, (d) selecting a portion of said range and modifying the transformation outside said portion and altering the image contrast.