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CONTRAST METRICS EVALUATION

Book Contribution - Book Chapter Conference Contribution

This paper investigates the performance of six contrast metrics published in literature, using the results of a pilot experiment on contrast perception of circular luminance distributions presented on a wall in a lab environment with minimal context. The circular stimuli, surrounded by a dark background, were varied with respect to intensity and edge sharpness. Both settings consisted of three values, low medium and high, resulting into 9 stimuli and 72 pairs. A Two-Interval Forced-Choice experiment was conducted with 10 observers. Tristimulus maps were captured from the subject’s viewing position using a high-resolution imaging colorimeter. From the tristimulus maps, contrast values were calculated for each contrast metric and compared with the observers contrast estimate. Of all investigated contrast metrics, retinal-like subsampling contrast performed best with a coefficient of determination of 0,96.
Book: PROCEEDINGS OF CIE 2016 LIGHTING QUALITY AND ENERGY EFFICIENCY
Pages: 70 - 78
Number of pages: 9
ISBN:978-3-902842-65-7
Publication year:2016