Setup the OPL and IPL parvo channels (see biologocal model)

obj.setupOPLandIPLParvoChannel('OptionName',optionValue, ...)

Options

• ColorMode specifies if (true) color is processed of not (false) to then processing gray level image. default true
• NormaliseOutput specifies if (true) output is rescaled between 0 and 255 of not (false). default true
• PhotoreceptorsLocalAdaptationSensitivity the photoreceptors sensitivity renage is 0-1 (more log compression effect when value increases). default 0.7
• PhotoreceptorsTemporalConstant the time constant of the first order low pass filter of the photoreceptors, use it to cut high temporal frequencies (noise or fast motion), unit is frames, typical value is 1 frame. default 0.5
• PhotoreceptorsSpatialConstant the spatial constant of the first order low pass filter of the photoreceptors, use it to cut high spatial frequencies (noise or thick contours), unit is pixels, typical value is 1 pixel. default 0.53
• HorizontalCellsGain gain of the horizontal cells network, if 0, then the mean value of the output is zero, if the parameter is near 1, then, the luminance is not filtered and is still reachable at the output, typicall value is 0. default 0.0
• HCellsTemporalConstant the time constant of the first order low pass filter of the horizontal cells, use it to cut low temporal frequencies (local luminance variations), unit is frames, typical value is 1 frame, as the photoreceptors. default 1.0
• HCellsSpatialConstant the spatial constant of the first order low pass filter of the horizontal cells, use it to cut low spatial frequencies (local luminance), unit is pixels, typical value is 5 pixel, this value is also used for local contrast computing when computing the local contrast adaptation at the ganglion cells level (Inner Plexiform Layer parvocellular channel model). default 7.0
• GanglionCellsSensitivity the compression strengh of the ganglion cells local adaptation output, set a value between 0.6 and 1 for best results, a high value increases more the low value sensitivity and the output saturates faster, recommended value: 0.7. default 0.7

OPL is referred as Outer Plexiform Layer of the retina, it allows the spatio-temporal filtering which withens the spectrum and reduces spatio-temporal noise while attenuating global luminance (low frequency energy) IPL parvo is the OPL next processing stage, it refers to a part of the Inner Plexiform layer of the retina, it allows high contours sensitivity in foveal vision. See reference papers for more information. For more information, please have a look at the paper [Benoit2010].