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balance

Light and shadow centroids

This Python plug-in helps in the comparison of the left part of an image to the right part (equilibrium or not). It can be applied to any type of image and computes the centroid of the gray image pixels. The centroid is similar to the centre of mass concept, where mass is replace by another quantity; here it is the lightness and the greyness of the pixel.

White Balance Puzzle Script

This script creates small rectangular selections and auto-white-balances them.
Copy it into the scripts folder from GIMP, you will find it then under Filters -> Light and Shadow -> White Balance Puzzle.
Be careful with the feather option, it consumes a lot of cpu power.
I use it more as an analysis tool for existing images. You can detect edits in low contrast areas with this script.

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