Faculty of Information Technology, BUT

Publication Details

New Transforms for JPEG Format

SVOBODA Stanislav and BAŘINA David. New Transforms for JPEG Format. In: Conference Materials and Posters of Spring Conference on Computer Graphics SCCG 2017. Mikulov: Brno University of Technology, 2017, pp. 25-30. ISSN 1335-5694.
Czech title
Nové transformace pro formát JPEG
Type
conference paper
Language
english
Authors
Svoboda Stanislav, Bc. (FIT BUT)
Bařina David, Ing., Ph.D. (DCGM FIT BUT)
Keywords
JPEG, lossy image compression, transform coding, discrete cosine transform, discrete wavelet transform
Abstract
The paper deals with the incorporation of several suitable transforms into the JPEG compression chain. Block-wise and lapped transfoms were analyzed. The evaluation is performed with respect to the PSNR on a dataset of several hundred images.
Annotation
The two-dimensional discrete cosine transform (DCT) can be found in the heart of many image compression algorithms. Specifically, the JPEG format uses a lossy form of compression based on that transform. Since the standardization of the JPEG, many other transforms become practical in lossy data compression. This article aims to analyze the use of these transforms as the DCT replacement in the JPEG compression chain. Each transform is examined for different image datasets and subsequently compared to other transforms using the peak signal-to-noise ratio (PSNR). Our experiments show that an overlapping variation of the DCT, the local cosine transform (LCT), overcame the original block-wise transform at low bitrates. At high bitrates, the discrete wavelet transform employing the Cohen-Daubechies-Feauveau 9/7 wavelet offers about the same compression performance as the DCT.
Published
2017
Pages
25-30
Journal
Proceeding of Spring Conference on Computer Graphics, vol. 2017, no. 5, ISSN 1335-5694
Proceedings
Conference Materials and Posters of Spring Conference on Computer Graphics SCCG 2017
Conference
Spring Conference on Computer Graphics 2017, Mikulov, CZ
Publisher
Brno University of Technology
Place
Mikulov, CZ
BibTeX
@INPROCEEDINGS{FITPUB11440,
   author = "Stanislav Svoboda and David Ba\v{r}ina",
   title = "New Transforms for JPEG Format",
   pages = "25--30",
   booktitle = "Conference Materials and Posters of Spring Conference on Computer Graphics SCCG 2017",
   journal = "Proceeding of Spring Conference on Computer Graphics",
   volume = 2017,
   number = 5,
   year = 2017,
   location = "Mikulov, CZ",
   publisher = "Brno University of Technology",
   ISSN = "1335-5694",
   language = "english",
   url = "https://www.fit.vut.cz/research/publication/11440"
}
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