PSNR Comparison of DCT-domain Image Resizing Methods 


Vol. 29,  No. 10, pp. 1484-1489, Oct.  2004


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  Abstract

Given a video frame in terms of its 8× 8 block_DCT coefficients, we wish to obtain a downsized or up sized version of this frame also ill terms of 8× 8 block DCT coefficients The DCT being a linear unit transform 18 distributive over matrix multipcanon This fact has been used for down sampling video frames ill the DCT domains ill Dugad ’ s, Mukherjee ’ s, and Park ’ s methods π Ie downsampling and upsampling schemes combined together preserve all the low-frequency DCT coefficients of the orignal image This imphes tremendous savings for co야ng the difference between the orignal frame (unsampled image) and Its prediction (the ups 잉 npled Image) This is desirable for many applications based on scalable encoding of video. In this paper, we extend the eacher works to various DCT 냨es, when we downsample and then upsample of an Image by a factor of two Through experiment, we could improve the PSNR values whenever we increase the DCT block size
However, because the complexity will be also increase. we can say there is a tradeoff The experiment result would provide important data for developing fast algorithms of compressed-domain image/video reslzing.

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  Cite this article

[IEEE Style]

D. Kim and Y. Choe, "PSNR Comparison of DCT-domain Image Resizing Methods," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 10, pp. 1484-1489, 2004. DOI: .

[ACM Style]

Danyeon Kim and Yoonsik Choe. 2004. PSNR Comparison of DCT-domain Image Resizing Methods. The Journal of Korean Institute of Communications and Information Sciences, 29, 10, (2004), 1484-1489. DOI: .

[KICS Style]

Danyeon Kim and Yoonsik Choe, "PSNR Comparison of DCT-domain Image Resizing Methods," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 10, pp. 1484-1489, 10. 2004.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880