Transparent PNGs: the 3 background-removal algorithms, why JPG can't do it, and the color-key gotcha

Every "make this background transparent" tool is doing one of three things under the hood, and picking the wrong one for your picture is why a logo comes back with a hole in it, or the background is only half gone. Transparency lives in the alpha channel A pixel needs a fourth value beyond R, G, B: alpha, how see-through it is. Only formats that... Weiterlesen