Abstract :
This paper presents new techniques for object-based video manipulations using mosaic representations of the fixed background of the scene. For that purpose, a new efficient camera motion estimation technique based on temporal linking, full search method and descent gradient methods is proposed to create the mosaic image. This global information is therefore used for video editing (for example suppression of an object), or to artificially change the camera point of view, i.e., the camera location and its focal. This kind of automatic tool is of great interest for the video post-production world in which, with the existing techniques, long and tedious manual efforts are necessary to achieve such object-based video manipulations
Keywords :
gradient methods; image matching; image representation; image sequences; motion estimation; search problems; video signal processing; camera location; camera motion estimation technique; camera point of view; descent gradient methods; full search method; global information; mosaic image; mosaic representation; object suppression; object-based video manipulations; post-production applications; scene fixed background; temporal linking; video editing; video object manipulations; Cameras; Gradient methods; Image processing; Image segmentation; Iris; Joining processes; Layout; Motion estimation; Search methods; Video sequences;
