HSV Analysis

NEW: GIMP plugin added. Compile and install with:

$ CFLAGS=-O3 gimptool-2.0 --install elsamuko-hsv-analysis.c

You will find the plugin then under Colors->HSV Analysis.

Original Image:

HSV Histogram:

Modified Image (yellow filter + high saturation):

HSV Histogram:

Result: The colors are not spreaded anymore. Also the regular pattern hints at color manipulations.

More information:

http://www.hackerfactor.com/blog/index.php?/archives/389-Out-of-the-Blue.html