Transformation of Orthogonal Coordinates into Polar Coordinates Using DDA-Computation of the Angle of Rotation of an Object.

Autor: Ueno, Meisayuki, Hama, Hiromitsu, Yamashita, Kazumi
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Zdroj: Systems & Computers in Japan; Mar1987, Vol. 18 Issue 3, p40-51, 12p
Abstrakt: This paper describes the algorithm which directly processes the gray-level image to determine the rotational angle. A complex computation is required to transform the orthogonal coordinates into the polar coordinates. In this paper, a transformation algorithm is proposed using DDA, which is a high-speed algorithm to generate the digital segment. To evaluate the usefulness of the proposed algorithm, a computer experiment was pert armed using several input images from a TV camera. The mean error of the rotational angle was ±0.8 deg, and the maximum error was ±3.9 deg, which is quite satisfactory. [ABSTRACT FROM AUTHOR]
Databáze: Supplemental Index
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