초록 ▼

A grayscale enhancement system which operates on color or monochrome source halftone images to produce output halftone cells of the same visual weight but spatially distributed to reduce artifacts caused by limited grayscale levels. By operating upon a set of input halftone cells surrounding each ou

A grayscale enhancement system which operates on color or monochrome source halftone images to produce output halftone cells of the same visual weight but spatially distributed to reduce artifacts caused by limited grayscale levels. By operating upon a set of input halftone cells surrounding each output pixel cell with a set of logic operations implementing unique algorithms, the system re-distributes the weight of the halftone cells characterizing inferred-halftone cells. A rendering subsystem, responsive to the inferred-halftones, then produces signal for driving an output device to the best of the output device's ability.

대표청구항 ▼

[ What is claimed is:] [1.]1. A grayscale enhancement method comprising:analyzing the state of selected pixels surrounding a subject pixel in a bit map;determining the number of selected pixels including the subject pixel that are black; andprinting a fractional pixel in each of a plurality of halft

[ What is claimed is:] [1.]1. A grayscale enhancement method comprising:analyzing the state of selected pixels surrounding a subject pixel in a bit map;determining the number of selected pixels including the subject pixel that are black; andprinting a fractional pixel in each of a plurality of halftone cells, the fractional pixels being related in size to at least the computed number of pixels which are black.