JPEG compliant efficient progressive image coding
Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on, 5, page 2633-2636. (1998)DOI: 10.1109/ICASSP.1998.678063
Abstract
Among the different modes of operations allowed in the current
JPEG standard, the sequential and progressive modes are the most widely
used. While the sequential JPEG mode yields essentially the same level
of compression performance for most encoder implementations, the
performance of progressive JPEG depends highly upon the designed encoder
structure. This is due to the flexibility the standard leaves open in
designing progressive JPEG encoders. In this paper, a rate-distortion
optimized JPEG compliant progressive encoder is presented that produces
a sequence of bit scans, ordered in terms of decreasing importance. Our
encoder outperforms a baseline sequential JPEG encoder in terms of
compression, significantly at medium bit rates, and substantially at low
and high bit rates. Moreover, unlike baseline JPEG encoders, ours can
achieve precise rate/distortion control. Good rate-distortion
performance at low bit rates and precise rate control, provided by our
JPEG compliant progressive encoder, are two highly desired features
currently sought for JPEG-2000
