（毕业设计论文）《VC++图像降噪技术研究》.docVIP

摘 要 本文以VC++6.0做为编程语言，对图像降噪技术进行研究。本文通过介绍位图的基本操作以及在图像中加入椒盐噪声的操作，从而进一步引出几种降噪方法。 本文分别介绍“均值滤波”、“中值滤波”以及“傅里叶降噪”和“小波降噪”四种算法，实现图像降噪。详细介绍了其基本原理、实现方法以及具体算法，并对降噪效果加以比较与分析。 “均值滤波”把每个像素都用周围的8个像素来做均值操作，可以平滑图像，速度快，算法简单。“中值滤波”是常用的非线性滤波方法 ,也是图像处理技术中最常用的预处理技术。同时在“低通滤波”及“小波降噪”中分别引入“快速傅里叶变换”和“Mallat 算法”，使得其取得更快速的计算，有效地解决了其计算量太大，运算时间过长的弊端，从而达到更好的综合降噪效果。 关键词：图像降噪；滤波；傅里叶降噪；小波降噪 Abstract Taking VC++6.0 as the programming language, this paper is a study about image noise reduction technology. Furthermore, introducing several noise reducing measures through the introduction of the basic processing and the operation to put the salt and pepper noise into the image. The paper introduces Averaging Filter, Median Filter,Fourier Lowpass Filtering and Wavelet Filter to achieve image noise reducing. Here we introduce the basic principles, implement methods, detailed arithmetic, and make comparison and analysis the noise reducing effects. Averaging Filter operates every pixel by using 8 pixels meanly. It can make the images smoothing, fast and easy to calculate. Median Filter Fourier is a common nonlinear filtering way and also common preprocessing technique when processing images. Introducing FFT and Mallat Algorithm separately into Lowpass Filtering and Wavelet Filter, and then we can make faster calculating and solve the massive calculating more efficiently. Therefore, we can have a more effective noise reducing. Keywords：Image Noise Reduction；Filter；Fourier Filter；Wavelet filter 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc264889814 1 绪论 PAGEREF _Toc264889814 \h 1 HYPERLINK \l _Toc264889815 1.1 VC++6.0简介 PAGEREF _Toc264889815 \h 1 HYPERLINK \l _Toc264889816 1.2 数字图像处理基本概念 PAGEREF _Toc264889816 \h 1 HYPERLINK \l _Toc264889817 1.3 图像降噪技术研究背景及意义 PAGEREF _Toc264889817 \h 2 HYPERLINK \l _Toc264889818 1.4 图像降噪的国内外研究现状 PAGEREF _Toc264889818 \h 2 HYPERLINK \l _Toc264889819 1.5 关于图像噪声 PAGEREF _Toc264889819 \h 2 HYPERLINK \l _Toc264889820 2 位图操作基本知识 PAGEREF _Toc264889820 \h 4 HYPER