Method and device for processing source pictures to generate aliasing

摘要

The invention concerns a method for processing a sequence of source pictures to generate artifacts due to aliasing when these source pictures are captured by a video capturing device. This method comprises a first time modulation step for modulating temporally at a first modulation frequency (f m1 ) the brightness of pixels of each picture of the sequence around a brightness to be displayed for said picture. According to an important feature of the invention, the method further comprises a second time modulation step for modulating temporally at a second modulation frequency (f m2 ) different from the first modulation frequency (f m1 ) the brightness of pixels of each picture of the sequence around a brightness value to be displayed for said picture, the first and second modulation frequencies (f m1 ,f m2 ) being determined in order not to be visible to the human eye and contributing to generate aliasing artifact at a predetermined aliasing frequency.