Local Parameters

The Lpars section — region correction factors and per-zone adjustments for skin, sky, and vegetation.

Local parameters control corrections applied to specific image regions.

VIESUS automatically calculates the appropriate correction for each image. The strength parameters scale how much of the calculated correction is actually applied.

Parameter	Range	Default	Description
highlightfac	0.0 – 1.0	0.5	Highlight region correction factor
shadowfac	0.0 – 1.0	0.5	Shadow region correction factor
colorfac	0.0 – 1.0	0.5	Region-specific color correction factor
skinToneAdjFac	0.0 – 1.0	0.2	Saturation reduction in face regions (prevents "glowing" faces)
addflashfac	0.0 – 1.0	0.5	Adaptive shadow highlighting for faces (0.3 recommended)

Color-specific adjustments

VIESUS applies dedicated adjustments to three color regions important for image quality: skin, sky, and vegetation. Each lives in its own sub-section (Lpars.skin, Lpars.sky, Lpars.veg) and uses the same parameter set:

Parameter	Range	Default	Description
huerotation	-10.0 – 10.0	0.0	Hue rotation for the specific color region
saturation	-1.0 – 1.0	0.0	Saturation adjustment for the region
brightness	-1.0 – 1.0	0.0	Brightness adjustment for the region
contrast	-1.0 – 1.0	0.0	Contrast adjustment for the region
strength	0.0 – 1.0	1.0	Overall strength of adjustments for the region