This paper addresses the problem of processing motion-JPEG video data in the compressed domain. The operations covered are those where a pixel in the output image is an arbitrary linear combination of pixels in the input image, which includes convolution, scaling, rotation, translation, morphing, de-interlacing, image composition, and transcoding. This paper further develops an approximation technique called condensation to improve performance and evaluates condensations in terms of processing speed and image quality. Using condensation, motion-JPEG video can be processed at near real-time rates on current generation workstations.
In a later paper REF , their methods are extended to the computation of arbitrary linear combinations of pixels in images of motion-JPEG video sequences.
Compressed Domain Processing of JPEG-encoded images
Real-Time Imaging
Computer Science