| by: B.C. Smith and L.A. Rowe |
|
This paper describes a new technique to implement operations on compressed
digital video images that allows many image manipulation operations to
be performed 50 to 100 times faster than the corresponding algorithms
operating on uncompressed images. This is accomplished by performing the
operations directly on the compressed data in the DCT domain. In this
paper, we show how to transform image space operations into DCT space
operations, we describe several representative algorithms in the
DCT domain and report their performance.