| 摘要 |
<p>An apparatus for, and method of, encoding information into and decoding information from, a sequence of moving images, such as video images. It is known to insert codes into images for purposes of identifying the owner of the images. However, existing schemes have suffered from the disadvantage that certain data compression techniques have removed or degraded the code so that the code cannot be later recognised. The present invention solves the problem by identifying moving and static portions of an image in an image sequence and providing two separate channels, one for the moving portion of an image and the other for a static portion of an image. One or more codes are then inserted into both moving and static image channels, so that moving image sequences including the code are, preserved even after image compression or low pass filtering.</p> |
