Abstract：
:In this study, we show that negative polarity noise patterns appear to have a higher contrast than positive polarity noise patterns with identical expected Fourier amplitude spectra. This demonstrates a failure of contrast constancy over changes in pattern polarity. An examination of local contrast measures shows that negative polarity noise has a wider distribution of local contrast values than positive polarity noise. We propose that the difference in apparent contrast between the two patterns may be based upon spatial non-linearities in the combination of local contrast measures.
journal_name
Vision Resjournal_title
Vision researchauthors
Benton CP,Johnston Adoi
10.1016/s0042-6989(99)00110-8subject
Has Abstractpub_date
1999-12-01 00:00:00pages
4076-84issue
24eissn
0042-6989issn
1878-5646pii
S0042-6989(99)00110-8journal_volume
39pub_type
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