Conclusions

  • For relatively uniform regions, e.g. healthy vegetation areas, water areas, soil areas, cloud areas and so on, the 1-D wavelet method is the best.

  • For highly textured regions, e.g. suburban urban areas, mixed agriculture field areas, mountain areas and so on, the modified OWT method wins over the others.

  • For whole images, OWT working at whole image mode - ordinary 2-D wavelet compression, is the most suitable.

  • Encoding different regions with different algorithms will achieve better performance than traditional on-board compression schemes, which use a fixed compression method applied to the whole image no matter what the application is.

References

[1] Katata, N. Ito, T. Aono and H. Kusao, "Object wavelet transform for coding of arbitrarily shaped image segments", IEEE Trans. on Circuits and Systems for Video Technology, vol. 7, no. 1, pp234-237, February, 1997

[2] Yi, S.J. Cho, W.J Kim, S.D. Kim and S.J. Lee, "A new coding algorithm for arbitrarily shaped image segments", Signal Processing: Image Communication, vol. 12, pp231-242, 1998