It is established that the perceived image contrast is affected by surround luminance. In order to
get the same perceived image contrast, the optimum surround compensation ratios for those surround conditions
is needed. Much research has been performed for dark, dim, and average surrounds. In this study, a wide range
of surround luminance from dark up to <TEX>$2087cd/m^2$</TEX> was considered. Using magnitude
estimation method, the change in perceived brightness of six test stimuli was measured under seven surround
conditions; dark, dim, 2 levels of average, bright, and 2 levels of over-bright surrounds. To drive the
perceived image contrast from the perceived brightness, two different definitions of contrast were tested.
Their calculated results were compared with the visual data of our previous work. And to conclude, the
perceived contrast compensation ratios were 1:1.11:1.2 for average, dim and dark surrounds. These were close
to CIECAM02 model (1:1.17:1.31). Besides, for average, bright, over-bright1 and over-bright2 surrounds the
ratios 1:1.17:1.42:1.69 were determined. For intermediate or more extreme surround conditions, the
compensation ratio was obtained from the linear interpolation or extrapolation.
© 2014 Optical Society of Korea
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