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Proceedings Paper

Online elimination of reflected images to generate high-quality images
Author(s): Noboru Ohnishi; Masaki Iwase; Tsuyoshi Yamamura; Toshimitsu Tanaka
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Paper Abstract

We often see scenes where an object's image is reflected on window glass and overlaps with a image of another object behind the glass. This paper proposes on-line methods for eliminating images reflected specularly on a smooth surface such as glass and plastic. Our methods are based on the optical property that light reflected on glass is polarized, while light transmitted through glass is less polarized. It is possible to eliminate reflected light with a polarizing filter. The polarization direction, however, changes even for planar glass and is not easily determined without information about the position and orientation of the glass and objects relative to the camera. Our method uses a series of images obtained by rotating a polarizing filter placed in front of a camera. Reflected images are removed by selecting just minimum image intensity among a series of images for each pixel. We propose two methods for estimating minimum image; one is min- max method and the other parameter estimation method. We conducted experiments with real images and compared the performances of the two methods. As a result, we could generate high quality image without reflected images at semi- video rate of 15 frames per second.

Paper Details

Date Published: 28 December 1998
PDF: 11 pages
Proc. SPIE 3653, Visual Communications and Image Processing '99, (28 December 1998); doi: 10.1117/12.334684
Show Author Affiliations
Noboru Ohnishi, Nagoya Univ. (Japan) and RIKEN--The Institute of Physical and Chemical Research (Japan)
Masaki Iwase, Nagoya Univ. (Japan)
Tsuyoshi Yamamura, Nagoya Univ. (Japan)
Toshimitsu Tanaka, Nagoya Univ. (Japan)

Published in SPIE Proceedings Vol. 3653:
Visual Communications and Image Processing '99
Kiyoharu Aizawa; Robert L. Stevenson; Ya-Qin Zhang, Editor(s)

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