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)


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.


shape adaptive transform Discrete Cosine Transform Discrete Fourier Transform 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

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

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