基于各向异性扩散的弱小目标增强算法(英文)

针对弱小目标对比度较低、边缘模糊、难以准确探测的问题,本文提出一种基于PDE的改进的各向异性扩散滤波算法增强弱小目标.该方法根据各向异性扩散原理,通过改进传统的P-M方程建立新的滤波模型,采用自适应滤波的方法在非目标区进行背景平滑,在局部变化的区域进行锐化处理增强弱小目标,从而达到背景平滑的同时增强边缘的效果.同时可以通过调节参数k和W选择平滑和锐化的程度,以适应不同的环境变化.实验结果表明,该方法能够有效的增强低对比度图像中的弱小目标.

Dim Target Enhancement Algorithm for Low-contrast Image based on Anisotropic Diffusion

In a sensed image of long distance, the gray levels of target and background are hardly distinguishable, which results in a low-contrast image. Dim-target detection is always a difficult problem. The aim of this paper is to propose an anisotropic diffusion filtering algorithm based on partial differential equation to enhance the dim targets. The algorithm establishes a new filter model by improving the traditional P-M model based on the anisotropic diffusion theory. The proposed method adaptively performs t...