TWO LEVEL FRACTAL IMAGE CODING ALGORITHM
碩士 === 大同工學院 === 電機工程學系 === 84 === In the recent years, a variety of image coding algorithms based onfractal theory have been proposed in the literature. To achieve the goalof fast encoding, these algorithms devote to search the optimal or...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
1996
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| Online Access: | http://ndltd.ncl.edu.tw/handle/70988644937749986902 |
| Summary: | 碩士 === 大同工學院 === 電機工程學系 === 84 === In the recent years, a variety of image coding algorithms based
onfractal theory have been proposed in the literature. To
achieve the goalof fast encoding, these algorithms devote to
search the optimal or the suboptimal domain block by expoliting
a self-similarity model of affinetransform.In this thesis, a new
method of fractal image coding is proposed. To reduce the
computational complexity of the image encoding, we adopt an
efficient approach based on two level domain pools. The first
leveldomain pool is the set of all available domain blocks but
the search iswith eight isometric transforms conducted without
isometric transform.The second layer domain pool is formed by
the reduced subset of the firstlevel domain pool. The exhaustive
search is conducted in the second leveldomain pool. It is shown
that the proposed two lwvel method can speed upthe encoding
process without noticeable loss of image quality.
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