Method of processing images to combat copying

Method of processing a source image sequence representing objects in a scene, comprising:

• detecting, in said scene, at least one object represented in said source image sequence in the scene,
• selecting, in at least one source image of the sequence where said at least one detected object is represented, the entirety of the pixels used to represent said at least one detected object such that the selected pixels do not correspond to the whole source image;
• and
• processing said at least one source image to modify the colour of the selected pixels so that the perceived colour of the selected pixels is unchanged in the processed source image with respect to the source image;
• wherein the processing said at least one source image comprises decomposing said at least one source image into n different component images, a colour vector being associated with each of the pixels of said source image and of the component images in a predetermined colour space, the colour vector associated with each pixel of said source image being equal to the resultant divided by n of the colour vectors associated with the n pixels of the component images corresponding to said pixel of the source image;
• and
• wherein said method further comprises displaying said component images successively at a display frequency at n times the display frequency of the source image sequence, wherein the display frequency of the component images is greater than the colour fusion frequency for the human eye.

Method of processing a source image sequence representing objects in a scene, comprising:

• detecting, in said scene, at least one object represented in said source image sequence in the scene,
• selecting, in at least one source image of the sequence where said at least one detected object is represented, the entirety of the pixels used to represent said at least one detected object such that the selected pixels do not correspond to the whole source image;
• and
• processing said at least one source image to modify the spectral composition of the light emitted by the selected pixels so that the perceived colour of the selected pixels is unchanged in the processed source image with respect to the source image;
• wherein said processing said at least one source image comprises replacing the colour of the selected pixels with a metameric colour in order to modify the spectral composition of the light emitted by the selected pixels, and
• wherein, for one and the same selected pixel having, in two consecutive source images, the same visual colour, the metameric colour employed in the first of the two consecutive source images is different from the metameric colour employed in the second of the two consecutive source images.