Photography
Tutorial: guard against unauthorized use of our photos with Gimp
In the previous article we mentioned the technique of quickly '"invisible watermark", a technique that would allow us to prove paternity of a digital photograph. The operation (as already described) is simple. The underlying principle of all is to have a picture "x" (my original photo I just have to keep) and create a picture "and" (the photo that contains the watermark invisible to circulate in internet). To prove to be the author of the photo just to compare a particular procedure by superimposing the two graphics immagni. Magically comparirà il watermark with our name and copyright information. (more…)