ENCODING AUXILIARY DATA IN AN IMAGE FRAME

摘要

A method of encoding auxiliary data in an image frame comprises dividing the image frame into one or more rectangular blocks, for at least one block within the image frame: transforming the block from the pixel to the frequency domain, defining a rectangular window within the transformed block, receiving auxiliary data, mapping a component of the auxiliary data to a position in the window, and inserting a luminance value in the mapped position.