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Proceedings Paper

Extracting Distance Using Gray Level Gradient On The Defocused Image
Author(s): Moriyuki Matsuo
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Paper Abstract

This paper proposes a new method to extract distance between an object and a TV-camera from a defocussed image by using gray level gradient. In this work, image clearness is defined as a measure of the gray level gradient as a whole. The defocussed image is not clear in the sense that the clearness of the defocussed image is of a low value, compared with the focussed image. First, the image clearness of a defocused image is discussed from the view-point that image clearness is represented by changes of the gray level in the local image. Secondly, the linear and the nonlinear clearness of the image are defined as the mean of gray level gradient in the image. Finally, a satisfactory result is obtained, extracting distance between an object and a TV-camera using clearness.

Paper Details

Date Published: 16 December 1988
PDF: 6 pages
Proc. SPIE 0974, Applications of Digital Image Processing XI, (16 December 1988); doi: 10.1117/12.948461
Show Author Affiliations
Moriyuki Matsuo, Tokai University (Japan)


Published in SPIE Proceedings Vol. 0974:
Applications of Digital Image Processing XI
Andrew G. Tescher, Editor(s)

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