Coding Efficiency Improvement By Applying Rate-Distortion Optimization To 3D-DCT Based Integral Image Compression Method
| Autor: | Ju-Il Jeon, Hyun-Soo Kang |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Reduction (complexity)
Variable (computer science) Mathematical optimization Rate–distortion optimization Computer Science::Computer Vision and Pattern Recognition Algorithmic efficiency ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Mode (statistics) Discrete cosine transform Algorithm Image compression Mathematics Block (data storage) |
| Zdroj: | The Journal of the Korea Contents Association. 12:1-8 |
| ISSN: | 1598-4877 |
| DOI: | 10.5392/jkca.2012.12.09.001 |
| Popis: | In this paper, we propose a rate-distortion optimization method to improve the coding efficiency of the conventional 3D-DCT based compression method using adaptive block mode selection for integral images. In the conventional 3D-DCT based compression method, 3D-DCT blocks of variable block sizes are adaptively selected depending on the characteristics of integral images, and then 3D-DCT is performed. The proposed method applies a rate-distortion optimization to determine the optimal block mode. In addition, we suggest the optimal Lagrangian parameter for integral images. Experimental results show that the proposed method gives bit-rate reduction of about 5%. |
| Databáze: | OpenAIRE |
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