Translator Disclaimer
1 May 1992 Imagesetter requirement limits based on a simple model of visual acuity
Author Affiliations +
A single spatial filter function closely replicating the contrast sensitivity of the visual system is used to predict the visual detection thresholds for narrow lines and dots and small amounts of edge blur. Both the predictions for lines and for edge blur are consistent with published data. Maximum differences with delta function lines and dots yield limits for distinguishing the actual width of lines and dots. A caution on spot size constraints based on fidelity of line width <"20 microns is given (other constraints are mentioned). Series expansions within the mathematical definitions reveal that the detection thresholds are simply related to polynomial power integrals (i.e. moments) of both the object profile and the visual system spatial filter function. An argument is presented that a halftone screen can not be free of screen-to-raster artifacts at addressabilities <'-1200 d.p.i. if the screen is not rational tangent. Published limits on the visibility of edge raggedness suggest that stairstepping at addressabilities <-3700 d.p.i. should never be a concern.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Henry A. Kelley "Imagesetter requirement limits based on a simple model of visual acuity", Proc. SPIE 1670, Color Hard Copy and Graphic Arts, (1 May 1992);


Resolution-dependence of perceived contrast of textures
Proceedings of SPIE (December 17 2003)
Improved digital multitoning with overmodulation scheme
Proceedings of SPIE (January 01 1998)
Periodic image artifacts in digital halftone prints
Proceedings of SPIE (September 30 1990)
The effect of opponent noise on image quality
Proceedings of SPIE (January 16 2005)
Visibility of simple features on complex backgrounds
Proceedings of SPIE (April 21 1996)
Simple spatial processing for color mappings
Proceedings of SPIE (May 29 2002)
Visual Model-Based Algorithms For Halftoning Images
Proceedings of SPIE (December 27 1981)

Back to Top