Name
Abstract | ||
|---|---|---|
A recursive algorithm is presented for generating quantization tables in JPEG (Joint Photographic Experts Group) baseline coders from the actual statistics of the input image. Starting from a quantization table with large step sizes, corresponding to low bit rate and high distortion, one entry of the quantization table is updated at a time so that, at each step, the ratio of decrease in distortion to increase in bit rate is approximately maximized. This procedure is repeated until a target bit rate is reached. Simulation results demonstrate that, with picture-adaptive quantization tables designed by the proposed algorithm, the JPEG DCT (discrete cosine transform) coder is able to compress images with better rate-distortion performance than that achievable with conventional empirically designed quantization tables.<> |
Year | DOI | Venue |
|---|---|---|
1993 | 10.1109/ICASSP.1993.319829 | Acoustics, Speech, and Signal Processing, 1993. ICASSP-93., 1993 IEEE International Conference |
Keywords | Field | DocType |
jpeg baseline coders,picture-adaptive quantization,image coding,discrete cosine transform,data compression,discrete cosine transforms,recursive algorithm,bit rate,joint photographic experts group,high distortion,large step size,low bit rate,conventional empirically-designed quantization table,quantization table,target bit picture-adaptive quantization,better rate-distortion performance,code standards,adaptive systems,rate-constrained picture-adaptive quantization,iterative methods,rate-distortion performance,actual statistic,statistics,transform coding,joint photographic expert group,quantization,rate distortion theory,pixel | Linde–Buzo–Gray algorithm,Computer science,Discrete cosine transform,Vector quantization,Artificial intelligence,Quantization (image processing),JPEG 2000,Computer vision,Pattern recognition,Transform coding,Algorithm,JPEG,Quantization (signal processing) | Conference |
Volume | ISSN | Citations |
5 | 1520-6149 | 43 |
PageRank | References | Authors |
6.48 | 6 | 2 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Siu-Wai Wu | 1 | 104 | 38.61 |
| Allen Gersho | 2 | 43 | 6.48 |