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Journal of Electronic Imaging

Scanline algorithms in the JPEG discrete cosine transform compressed domain
Author(s): Bo Shen; Ishwar K. Sethi
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Paper Abstract

Scanline algorithms are popular in computer graphics for complex geometric manipulations. The main characteristic of scanline algorithms is that a geometric transformation is decomposed into multipass transforms with each pass operating only along row or column scanlines. This leads to conversion of 2-D image manipulation problems to straightforward 1-D problems resulting in simple and systematic methods. The goal of this work is to examine the scanline approach for manipulation of transform-compressed images without decompressing them. We show how the scanline algorithms for rotation and projective mapping can be developed for JPEG/DCT images. The performance of the proposed scanline algorithms is evaluated with respect to quality, speed, and control and memory overhead.

Paper Details

Date Published: 1 April 1996
PDF: 9 pages
J. Electron. Imaging. 5(2) doi: 10.1117/12.238699
Published in: Journal of Electronic Imaging Volume 5, Issue 2
Show Author Affiliations
Bo Shen, Wayne State Univ. (United States)
Ishwar K. Sethi, Wayne State Univ. (United States)


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