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Proceedings Paper

Degree of quantization and spatial addressability trade-offs in the perceived quality of color images
Author(s): Alexander A. Vaysman; Mark D. Fairchild
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Paper Abstract

Investigation of the tradeoffs between the number of quantization levels and spatial addressability of printed color images was performed. Error diffusion in CMYK color space was used to quantize the images. Quantized images were printed on a single color printer simulating different spatial addressabilities. A psychophysical experiment was conducted to evaluate the perceived image quality (IQ) of the prints. The conclusions on the tradeoffs were drawn based on the results of the consequent statistical analysis. It was determined that the tradeoffs were scene dependent with pictorial scenes being able to sustain greater reduction in addressability without perceived IQ being decreased than graphics. The results of the experiment demonstrated that pictorial scenes were sufficient to be printed with 5 bits per color (bpc) per pixel at 100 dots per inch (dpi), and graphics -- 3 bits per color per pixel at 300 dpi in order to match the perceived IQ of the best possible, 8 bpc - 300 dpi, combination for the given system at normal viewing distance. If a single bpc-dpi combination was to be named as the optimum, it would have to be 3 bpc - 300 dpi.

Paper Details

Date Published: 2 January 1998
PDF: 12 pages
Proc. SPIE 3300, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts III, (2 January 1998); doi: 10.1117/12.298287
Show Author Affiliations
Alexander A. Vaysman, Xerox Corp. and Rochester Institute of Technology (United States)
Mark D. Fairchild, Rochester Institute of Technology (United States)

Published in SPIE Proceedings Vol. 3300:
Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts III
Giordano B. Beretta; Reiner Eschbach, Editor(s)

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