Computer Science and Information Engineering, World Congress on (2009)
Los Angeles, California USA
Mar. 31, 2009 to Apr. 2, 2009
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/CSIE.2009.600
For fractal image coding, flat range blocks are reconstructed only by their mean pixel values, and non-flat range blocks are reconstructed by the best matching domain blocks that are most similar to the range blocks selected from non-flat domain blocks. So, the threshold values of standard deviation for flat/non-flat range blocks and for flat/non-flat domain blocks influence the quality of the reconstructed image. In this paper, we propose a design method for threshold values of flat/non-flat blocks to obtain a high quality reconstructed image. From the results of simulation experiments, the relationships between the threshold value of flat/non-flat range blocks and of flat/non-flat domain blocks which can produce a high quality reconstructed image is expressed by a proportionality relationship. The approximation error is consequently suppressed to within 0.15 dB. The effectiveness of the proposed method using these threshold values is shown below.
Fractal image coding, Scaling factor, Flat/Non-flat image block
H. Xiaotong and B. Dexue, "Designing for Threshold Values of Flat/Non-flat Image Blocks for Fractal Image Coding," 2009 WRI World Congress on Computer Science and Information Engineering, CSIE(CSIE), Los Angeles, CA, 2009, pp. 275-279.