Hi, On Tue, 2008-06-10 at 18:46 +0300, Cristian Secară wrote: > In Colors menu there are two invert positions, one is Invert and other > in Value invert. > > For the first invert, the floating help says "Invert the colors". > For the second invert, the floatig help says "Invert the brightness of > each pixel". > > My first question is why are the menu names not self-explained. > Why is the first only "Invert" and is not "Color invert" ?
Because "Invert" implements the classic definition of an Invert operation on RGB images. It's the term that people are looking for. > My second question is what other value things can be inverted other > than the luminance pixels. Why is the second "Value invert" and not > "Luminance invert" ? Whom else value ? Value is a well-defined concept in image processing. The value of a pixel is defined as the maximum value of its RGB channels. It one way to define a measure for the intensity of a pixel. The Value Invert operation performs the color inversion in the HSV space (where V is Value), leaving Hue and Saturation untouched. Sven _______________________________________________ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
