| Session: | Poster Session |
| Location: | Poster Area |
| Session Time: | Tuesday, June 26, 15:40 - 17:00 |
| Presentation Time: | Tuesday, June 26, 15:40 - 16:40 |
| Presentation: |
Poster
|
| Paper Title: |
JOINT OPTIMIZATION OF RATE, DISTORTION, AND MAXIMUM ABSOLUTE ERROR FOR COMPRESSION OF MEDICAL VOLUMES USING HEVC INTRA |
| Authors: |
Karina Jaskolka; Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany | | |
| | André Kaup; Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany | | |
| Abstract: |
Many visual quality metrics are used to measure the quality of lossy compressed images and videos, and are integrated in the rate-distortion optimization of hybrid video codecs. However, most of the metrics focus on the average objective quality in a picture. In certain applications, like medical image processing, the maximum absolute error should be more weighted. In this paper, the rate-distortion optimization of HEVC is extended by integrating this error metric. Thus, rate, average error, and maximum absolute error are jointly optimized. Furthermore, a weighting factor α is included into the calculation of the optimization for balancing the ratio between average and maximum absolute error. For HEVC intra with α = 0.25 an average maximum absolute error reduction of -25.63 can be achieved, while the bitrate increases slightly by 0.59%. Furthermore, the visual quality of the medical volumes improves and the data fidelity increases, i.e. less block artifacts appear and less structure disappear. |