Of an image or animated gif, having parts that do not overwrite the color of the background the image is placed over.
Open, public; having the property that theories and practices are publicly visible, thereby reducing the chance of corruption.
Not noticeable because it happens automatically or in the background; invisible.
Having the property of transparency, i.e. sufficiently accurate that the compressed result is perceptually indistinguishable from the uncompressed input.
See-through, clear; having the property that light passes through it almost undisturbed, such that one can see through it clearly.
Obvious; readily apparent; easy to see or understand.
Not pigmented.