Global Parameters

The Gpars section — global enhancement strengths, specialised AI strengths, and manual corrections applied to the whole image.

Global parameters control enhancement algorithms applied to the entire image.

Enhancement strength

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
brstrength	0.0 – 1.0	0.5	Brightness correction (most visible on underexposed images)
ccstrength	0.0 – 1.0	0.5	Color correction (removes color casts)
shplocalstrength	0.0 – 1.0	0.5	Local sharpening strength (visible in foliage, less in sky regions)
nrmonostrength	0.0 – 1.0	0.5	Noise reduction strength for monochrome images
nrstrength	0.0 – 1.0	0.5	Noise reduction strength for color images
gastrength	0.0 – 1.0	0.5	Grain addition strength (reduces banding/posterisation)

Specialised enhancement

Parameter	Range	Default	Description
rerstrength	0.0 – 1.0	1.0	Red-eye reduction (higher values increase detection — and false positives)
fdstrength	0.0 – 1.0	0.5	Face detection sensitivity. Higher values detect smaller faces at the cost of processing time. Useful for group shots.
eyestrength	0.0 – 1.0	0.5	Eye detection strictness for red-eye correction
frstrength	0.0 – 1.0	0.3	Face reconstruction strength for smaller faces
blurstrength	0.0 – 1.0	0.0	Background blur / computational bokeh strength
srstrength	0.0 – 1.0	0.9	Super-resolution blending strength with default upscaling
sfstrength	0.0 – 1.0	0.25	Small-face reconstruction importance (0.25 – 0.50 recommended)
dastrength	0.0 – 1.0	0.5	Dark scene / night shot brightness correction
arstrength	0.0 – 1.0	0.5	AI Artifact Removal activation threshold. Higher = only triggers on more severely degraded images
hdrstrength	0.0 – 1.0	0.5	HDR tonemapping strength
vscenestrength	0.0 – 1.0	1.0	Blends the detected scene's parameters with the defaults. 0.0 = full default behavior; 1.0 = full vScene parameters applied

Manual corrections

Manual corrections are static and applied at the end of automatic processing, regardless of the analysis result. Adjust carefully — they can override otherwise correct automatic behavior.

Parameter	Range	Default	Description
brightness	-1.0 – 1.0	0.0	Global brightness adjustment
contrast	-1.0 – 1.0	0.0	Global contrast adjustment
saturation	-1.0 – 1.0	0.0	Global saturation adjustment
r	-1.0 – 1.0	0.0	Red channel color balance
g	-1.0 – 1.0	0.0	Green channel color balance
b	-1.0 – 1.0	0.0	Blue channel color balance
shpglobalstrength	0.0 – 1.0	0.0	Global sharpening strength