Nondirectional edge enhancement by contrast-reverted low-pass Fourier filtering
Applied Optics, Vol. 49, Issue 17, pp. 3291-3296 (2010)
http://dx.doi.org/10.1364/AO.49.003291
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Abstract
We present an image processing method for nondirectional edge extraction/enhancement. The method is based on the capability of twisted-nematic liquid-crystal displays (LCDs) to traduce the image information in changes of the state of polarization of the light, which allows us to generate simultaneously a “positive” and a “negative” (i.e., contrast-reversed) replica of the digital image displayed on the LCD. The negative image is low-pass filtered in a novel polarization-selective
© 2010 Optical Society of America
OCIS Codes
(100.1160) Image processing : Analog optical image processing
(100.2980) Image processing : Image enhancement
ToC Category:
Image Processing
History
Original Manuscript: April 13, 2010
Revised Manuscript: May 11, 2010
Manuscript Accepted: May 18, 2010
Published: June 3, 2010
Citation
José A. Ferrari and Jorge L. Flores, "Nondirectional edge enhancement by contrast-reverted low-pass Fourier filtering," Appl. Opt. 49, 3291-3296 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-17-3291
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