[ Thanks to An Anonymous
Reader for this link. ]
“Quickly transform image gamma, brightness, contrast,
saturation, hue, posterize from a single dialog, and preview the
results in real time.Apply various effects such as invert, greyscale, isometric
transformations, edge detect, sharpen, unsharp mask, soften,
Gaussian blur, emboss, bacteria.Use gamma correction on effects to improve the quality of
various effects.”