Abstract
In this paper, we introduce a series of perception experiments to measure
the just noticeable difference (JND) in black level (BL) and white level (WL)
for natural image content under common viewing conditions. Based on these
experiments the JND in BL is determined for 13 images and the JND in WL for
18 images. In both cases the JND is found to be image content dependent. To
model this image content dependency, we evaluated various luminance characteristics
of the whole image and of the main area of focus (AF) of the image. Regression
analysis revealed that both JNDs are largely determined by the overall (average)
luminance of the image weighted with the average luminance of the AF. The
relationship of these two luminance contributions to the JND of BL and WL
is proven to be stable for most types of image content.
© 2014 IEEE
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