Letter

[OPTICAL REVIEW Vol. 7, No. 3 (2000) 187-189]

Extraction of Input Objects from Optical Hough Transform Data

Sang-Gug PARK,¹ Sung-Young KIM² and Soo-Joong KIM³

1Automation Research Division, Research Institute of Industrial Science & Technology, P.O. Box 135, Pohang, 790-600, Korea, 2Department of Computer Engineering, Uiduk University, 780-713, Kangdong, Kyungju, Korea, 3Department of Electronic and Electric Engineering, Kyungpook National University, Taegu, Korea

(Received January 29, 2000; Accepted March 8, 2000)

We propose a method of extracting the true length of a line and an ellipse with two axes from the width of envelopes in the parameter domain. We performed computer simulations and, using a Hough transform computer generated hologram filter, also performed optical experiments. Our experimental results were very similar to those of the simulation.

Key words: optical Hough transform, Hough transform filter, computer generated hologram, matrix hologram, parameter domain, line and ellipse

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