Dynamic decorrelation as a unifying principle for explaining a broad range of brightness phenomena
Fig 3
Sensitivity to contrast and luminance.
(A) (left) Fruits filtered by a Contrast-Luminance filter g (Eq 1). (Middle) Fruits filtered by a Contrast-only filter g with the same orientation (Eq 1). (Right) Fruits filtered by a low-pass filter. (B) Example luminance step (values -0.3 to 0.5) and an example for a homogeneous region with luminance 0.3. (C) Responses (maximum) of Contrast-Luminance filters (solid lines) and Contrast-only filters (dashed lines) to the homogeneous region (red color) and the luminance step (blue color). For the luminance step, the lower luminance was increased from -0.5 to 0.5. Negative filter responses result from the use of negative input values.