基于离散平稳小波变换的图像同态增强

Image Enhancement Based on Discrete Stationary Wavelet Transform and Homomorphic Filtering

同态增强可用于减少光照不均匀引起的图像降质,提出了一种基于离散平稳小波变换的图像同态增强算法,对图像进行离散平稳小波变换后,对变换后的各个高频子带采用不同的同态滤波器进行增强处理,实验结果表明,提出的方法能有效地提高图像对比度,又能突出图像的细节部分信息,其效果优于传统的同态增强。

Homomorphic filtering can reduce the undesired contributions within the image due to light source nonuniformity. A new method based on discrete stationary wavelet transform is applied to Homomorphic filtering to enhance the contrast of an image effectively. After making discrete stationary wavelet transform to image. According to the result of experiment, the given algorithm can extrude the details information of the image well, also is better than the traditional homomorphic filtering.