docrobot.watermarks
Classes 
BinaryWatermark
BubblesWatermark
CrosshatchWatermark
ImageWatermarkAngelina
ImageWatermarkBeyonce
ImageWatermarkDominic
ImageWatermarkTerry
LatchWatermark
MetalWallWatermark
NoiseCopperplateEngravingWatermark
NoiseFabricWatermark
NoiseMagneticFieldWatermark
NoiseMarbleVeinWatermark
NoiseMazeWatermark
NoisePlanktonWatermark
NoiseWoodWatermark
NoneWatermark
NullWatermark
SquareMosaicWatermark
StripesWatermark