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Optical Engineering

Video tape recorder head inspection using image processing techniques
Author(s): Choonsuk Oh; Young Kee Ryu; Byoung Ok Roh
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Paper Abstract

In currently selling video tape recorders (VTRs), two or more heads fixed at a revolving drum are used to record or reproduce video signals. To obtain uniform quality, the video heads should have similar characteristics such as geometrical shape and electromagnetic performance. This research is designed to develop a visual inspection system that can measure four geometrical parameters. To obtain reliable results, a digital signal processing-based image board and target-based imageprocessing algorithms were used. A series of experiments were performed on 1000 video heads. From observation of the experimental results, except for the cases of noise on the head and cracklike defects, we were able to obtain high inspection reliability, with an error bound within ±5 ?m.

Paper Details

Date Published: 1 January 1999
PDF: 7 pages
Opt. Eng. 38(1) doi: 10.1117/1.602067
Published in: Optical Engineering Volume 38, Issue 1
Show Author Affiliations
Choonsuk Oh, Sun Moon Univ. (South Korea)
Young Kee Ryu, Sun Moon Univ. (South Korea)
Byoung Ok Roh, Sun Moon Univ. (South Korea)


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