Procedural elements for computer graphics
Procedural elements for computer graphics
Digital halftoning
Fundamentals of digital image processing
Fundamentals of digital image processing
Filtering edges for gray-scale displays
SIGGRAPH '81 Proceedings of the 8th annual conference on Computer graphics and interactive techniques
SIGGRAPH '84 Proceedings of the 11th annual conference on Computer graphics and interactive techniques
Color Recovery: True-Color 8-Bit Interactive Graphics
IEEE Computer Graphics and Applications
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Three approaches that together improve the quality of dithered images by decreasing the intensity error and distributing the remaining quantization error more effectively, both spatially and across the intensity range, are described. The first method improves the intensity error distribution. The second method, which is complementary to the first, improves the quality of low-intensity vectors and surfaces through the use of a nonlinear quantizer. The third method specifically improves vector dithering. The primary focus is on dithering from 24 b to 12 b RGB but 24-b to 15-b dithering (5 bits each of red, green, and blue) were also investigated.