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A method of affine transformation for rectangular video image

โœ Scribed by Hiroto Kagotani; Yoichiro Sato; Yoshimichi Takahara; Takuji Okamoto

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
415 KB
Volume
31
Category
Article
ISSN
0882-1666

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โœฆ Synopsis

This paper proposes the 1-affine transformation for rectangular video images. In the proposed method, each frame of the input rectangular video images is partitioned into small square subimages, which are stored separately in memory. Then, by applying the 90ยฐ rotation and the one-dimensional geometrical transformations alternately for two times each, the affine transformation is realized. The affine transformer based on this principle is realized by two kinds of functional modules corresponding to the 90ยฐ rotation and the one-dimensional geometrical transformation, respectively. The block diagram for the affine transformation is shown combining those functional modules. Calculation of the adequate size for the subimage, as well as the reduction of the memory speed requirement by the partitioning, are discussed. The proposed method can easily be applied to video images with different sizes only by modifying the combination of the two kinds of functional modules.

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