Flores Jorge L, Ferrari José A
Electronic Engineering Department, University of Guadalajara, Avenue Revolución 1500, Guadalajara, Jalisco, México, CP 44840.
Appl Opt. 2010 Feb 1;49(4):619-24. doi: 10.1364/AO.49.000619.
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.
我们提出了一种基于辐照度传输方程的方向选择性边缘检测与增强方法。该技术能够区分强度模式沿任意选定方向的导数符号。此方法基于液晶显示器同时生成其显示图像的对比度反转副本的能力。当将这两幅图像（原始图像及其副本）通过一个轻微散焦的平面进行成像时，就会得到一个一阶导数增强的图像。与大多数傅里叶方法不同，该技术在低相干光源下效果良好，且不需要精确对准。所提出的方法不涉及数值处理，因此在实时应用中处理大图像可能具有潜在用途。文中给出了验证实验结果。
