摘要
图像锐化是为了使图像的边缘、轮廓线以及图像的细节变得更清晰。本文介绍了图像锐化的作用和常见的图像锐化方法,分析了小波变换的理论基础,以及在图像锐化方面小波基的选择,最终在MATLAB中采用Db3小波基,通过多尺度的分析变换对图像进行两层分解和图像重构,实现图像锐化。并与传统的傅里叶变换相比较,得到采用Db3小波锐化图像的效果要比DCT方法更见优势。
Image sharpening is to make the image edge,contour and image details become clearer. This paper introduces the function of image sharpening and common image sharpening method,analyzes the theoretical basis of wavelet transform,and the selection of wavelet bases in image sharpening. After that,the paper uses Db3 wavelet base in MATLAB,and carries on the two layer decomposition and image reconstruction through multi- scale analysis transform. Based on the aboved,compared with the traditional Fourier transform,the effect of the Db3 wavelet is better than the DCT method.
出处
《智能计算机与应用》
2015年第6期22-23,26,共3页
Intelligent Computer and Applications
关键词
小波变换
Db3
图像锐化
Wavelet Transform
Db3
Image Sharpening
