| 摘要 |
A digital halftoning device for converting digitized contoned image data representing an input image into a halftoned image to be displayed in a visually discernible manner comprising: dividing a digitized contoned image data into a plurality of contoned macrocells at predetermined, integrally spaced locations; determining the optical density of each of the macrocells; converting the contoned macropixels to their halftoned representation, including: comparing the optical density of the macrocells against a predetermined threshold; and suppressing chosen macropixels on integer centers in regions of the image where the threshold code value is exceeded; converting the macropixel pattern into a micropixel image pattern; and outputting the micropixel image pattern to be displayed in a visually discernible manner. The result is the creation of a superpixel in areas of high optical density to create a greater number of gray levels at the expense of spatial resolution.
|
