This project was for a photographer friend. With it you can choose a logo, an input folder containing all your photo and pictures, an output folder which will contain all you photo modified.
/!\ BE CAREFUL /!\ if you choose the same folder your photo will be erase and replace.
Then you can choose the background color of your logo to make it invisible, which corner you want to stamp it and the opacity.
Just press OK and wait few seconds to have all your photo stamped with your lovely logo !