Advertisement

Coding of Irregular Image Regions by SA DFT

  • Ryszard Stasiński
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2124)

Abstract

In the paper the new transform adapting to shapes of irregular image segments is introduced, the shape-adaptive (SA) DFT. Its definition is based on periodic data extension rather than data shifts, hence, in contrast to SA DCT segment reconstruction is possible even if part of contour data is missing. Visually the quality of images reconstructed from the part of SA DFT samples is almost as good as for the SA DCT, especially for high compression ratios.

Keywords

shape adaptive transform Discrete Cosine Transform Discrete Fourier Transform 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Sikora, T., Makai, B., Shape-adaptive DCT for generic coding of video. IEEE Trans. Circuits Syst. Video Technol., 5 (1995) 59–62CrossRefGoogle Scholar
  2. 2.
    Kauff, Schüür, An extension of shape-adaptive DCT (SA-DCT) towards DC separation and ÄDC correction. In: Proc. 1997 Picture Coding Symposium, Berlin (1997) 647–652Google Scholar
  3. 3.
    Kaup, Pañis, S.: On the performance of the shape adaptive DCT in object-based coding of motion compensated difference images, ibid. (1997) 652–657Google Scholar
  4. 4.
    Stasinski, R., Konrad, J.: A new class of fast shape-adaptive orthogonal transforms and their application to region-based image compression. IEEE Trans. Circuits Syst. Video Technol., 9 (1999) 16–34CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Ryszard Stasiński
    • 1
  1. 1.Instytut Elektroniki i TelekomunikacjiPolitechnika PoznańskaPoznańPoland

Personalised recommendations