Orientation-selective edge detection and enhancement using the irradiance transport equation

Applied Optics
Jorge L Flores, José A Ferrari

Abstract

We present a method for orientation-selective edge detection and enhancement based on the irradiance transport equation. The proposed technique distinguishes the sign of the derivative of the intensity pattern along an arbitrarily selected direction. The method is based on the capacity of liquid-crystal displays to generate simultaneously a contrast reverted replica of the image displayed on it. When both images (the original one and its replica) are imagined across a slightly defocused plane, one obtains an image with enhanced first derivatives. Unlike most Fourier methods, the proposed technique works well with a low-coherence light source, and it does not require precise alignment. The proposed method does not involve numerical processing, and thus it could be potentially useful for processing large images in real-time applications. Validation experiments are presented.

References

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Citations

Mar 5, 2013·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Lai WeiYuqiu Gu
Jun 12, 2010·Applied Optics·José A Ferrari, Jorge L Flores
Dec 6, 2011·Optics Letters·Jorge L FloresJosé A Ferrari
Jun 15, 2012·Applied Optics·J Matías Di MartinoJosé A Ferrari

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