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Progressive decoding method for fractal image compression

Progressive decoding method for fractal image compression. Sourcs: IEE Proc.-Vis. Image Signal Process., Vol. 151, No. 3, June 2004 Authurs: C. He, S.X. Yang and X. Huang Presented by: Shih-Chang.Chang Date: 4/21 2005. Outline. Introduction Fractal image compression Decoding scheme

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Progressive decoding method for fractal image compression

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  1. Progressive decoding method for fractal image compression • Sourcs: IEE Proc.-Vis. Image Signal Process., Vol. 151, No. 3, June 2004 • Authurs: C. He, S.X. Yang and X. Huang • Presented by: Shih-Chang.Chang • Date: 4/21 2005

  2. Outline • Introduction • Fractal image compression • Decoding scheme • Experimental results • Conclusion

  3. Introduction • In particular, the existing decoding scheme is a special case of the proposed controllable decoding scheme when its control parameter is set as one.

  4. fractal image compression (cont.)

  5. fractal image compression (cont.) pattern Ι 0° 1. 16 2 45° ……………………… … *8 8*8 16*16 256*256 …

  6. fractal image compression (cont.) compare Ri 8*8 1,2,0.5 Index table

  7. decoding scheme (cont.) …… …… μ0 μ1 μn 1,2,0.5 • μn+1=T(μn) • Exist Index table

  8. decoding scheme (cont.) 1-λ …… λ …… μ0 μ1 μn 1,2,0.5 • μn+1=(1-λ) μn+ λT(μn), λ=(0,1] • Propose

  9. decoding scheme (cont.) exist Propose

  10. Experimental results(cont.)

  11. Experimental results(cont.)

  12. Experimental results(cont.)

  13. Conclusion • The existing rigid decoding scheme, the proposed scheme provides a better choice for some applications that need progressive decompression. • Increasing sequence {λn} with 0<λn ≦1 is used,instead of the constant parameterλ.

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