Abstract :
The paper presents a technique for the creation of a sequence of mosaic images from an original video shot. A mosaic image represents, on a single image, the scene background seen all over the sequence and its creation requires the estimation of the warping parameters and the use of a blending technique. An analytic minimization criterion is proposed to optimize the determination of the blending coefficient used for the update of the mosaic image with a new original image. This criterion is based on constraints related to the temporal variations of the background, the temporal delay and the resolution of the created mosaic images, while its minimization can be analytically performed. The proposed method is applied to the creation of new video sequences in which the camera point of view, the camera focal, or the image size are modified. This approach has been tested and validated on real video sequences with large camera motion
Keywords :
image sequences; minimisation; parameter estimation; temporal logic; video signal processing; analytic minimization criterion; blending technique; camera focal; dynamic mosaicking; image size; large camera motion; minimization; mosaic image; mosaic image sequence; optimal criterion; original video shot; real video sequences; scene background; temporal delay; temporal variations; video sequences; warping parameters; Apertures; Cameras; Delay; Image analysis; Image resolution; Image segmentation; Layout; Lighting; Testing; Video sequences;
