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Effect of experimental methodology on the JND of the black level for natural images
Author(s) -
Qin ShaoLing,
Ge Shu,
Yin HanChun,
Liu Lu,
Heynderickx Ingrid
Publication year - 2009
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/jsid17.8.687
Subject(s) - just noticeable difference , task (project management) , significant difference , set (abstract data type) , psychophysics , computer science , mathematics , paired comparison , artificial intelligence , natural (archaeology) , statistics , pattern recognition (psychology) , perception , psychology , management , archaeology , neuroscience , economics , history , programming language
— The effect of experimental methodology on the Just Noticeable Difference (JND) of the black level (BL) is assessed using a set of representative natural images. Two methodologies, known in psychophysics to determine JNDs, are mutually compared: an adapted method of adjustment with a same‐difference task and a one‐up‐two‐down staircase method with a two‐alternative forced‐choice task. Thus far, the literature has shown contradictory results for which of the two methods yields the lower difference thresholds. Experimental results show that the second method yields lower JNDs, but is slightly less efficient. Based on this second method, it was found that the JND of the BL for natural images ranges from 0.2 to 1.0 cd/m 2 , varying with image content significantly.