Journal
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
Volume 17, Issue 4, Pages 451-457Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218348X09004545
Keywords
Fractal Image Coding; Quadtree Division; Asymptotic Strategy; Neighbor Search
Funding
- National Natural Science Foundation of China [60573172, 60973152]
- Superior University doctor Subject Special Scientific Research Foundation of China [20070141014]
- Natural Science Foundation of Liaoning province [20082165]
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This paper presents a fast fractal image coding method based on quadtree division, improved neighbor search and asymptotic strategy. We search the optimal matched domain block of a range block in its five nearest neighbor blocks and make asymptotic moves along the direction of potential optimal solution. If the optimal solution can not be improved, we carry out quadtree division for this range block until it caters to our demand or reaches greatest division level. The experimental results show that the coding speed of the proposed method declined slightly, but it has a better quality of reconstructed image and higher compression ratio in comparisons with no search method.
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