Sharpness, sharpness-related attributes, and their physical correlates

Marco Nijenhuis; Roelof Hamberg; Cornelis Teunissen; Soren Bech; Henny Looren de Jong; Paul Houben; Sakti K. Pramanik

doi:10.1117/12.270052

4 April 1997 Sharpness, sharpness-related attributes, and their physical correlates

Marco Nijenhuis, Roelof Hamberg, Cornelis Teunissen, Soren Bech, Henny Looren de Jong, Paul Houben, Sakti K. Pramanik

Proceedings Volume 3025, Very High Resolution and Quality Imaging II; (1997) https://doi.org/10.1117/12.270052
Event: Electronic Imaging '97, 1997, San Jose, CA, United States

Abstract

In this paper we present a metric that predicts differences in perceptual sharpness from physical parameters extracted from CCD camera recordings of sine-grating and step-profile test images. Sharpness differences were induced by using five different high-end television sets to display natural color images as well as by using blurred versions of these images. The metric is a two-step model that uses the perceptual strengths of three sharpness-related attributes on an intermediate level between the physical parameters and perceptual sharpness. The data obtained from category scaling experiments indicate that perceptual strength of sharpness is a linear combination of the perceptual strengths of the attributes detail rendering and contour rendering. It was found that differences in detail rendering correlate with differences in modulation depth of the sine gratings and that differences in contour rendering can be explained from the slope and overshoot parameters of the step-profiles.

Citation Download Citation

Marco Nijenhuis, Roelof Hamberg, Cornelis Teunissen, Soren Bech, Henny Looren de Jong, Paul Houben, and Sakti K. Pramanik "Sharpness, sharpness-related attributes, and their physical correlates", Proc. SPIE 3025, Very High Resolution and Quality Imaging II, (4 April 1997); https://doi.org/10.1117/12.270052

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