图像处理毕业设计(论文)

河南理工大学

毕业设计（论文）

题目基于插值方法的数字图像几何变换的研究与实现

院（系、部) 计算机科学与技术学院

专业及班级软件 Java11-01 姓名

学号 311109060123 指导教师王静

日期 2015年5月15日

河南理工大学毕业设计（论文）说明书

摘要

随着数字图像技术的发展,数字图像处理广泛应用于几乎所有与图像处理有关的领域。图像的几何变换是数字图像处理中一个基本的、非常重要的变换,而图像的平移、图像的镜像变换、图像的转置、图像的缩放、图像的旋转、图像的剪取等等是几何变换中最复杂的变换。

本文中主要分析了图像的几种几何原理,首先对图像变换中用到的插值处理方法,即：最近邻法、双线性插值法和三次内插值法,进行了比较。其次详细阐述了每种算法的原理及特点；最后运用Matlab软件对图片进行仿真处理，通过分析仿真结果得出各种算法的优缺点及适用的场所。

关键词：MATLAB;图像缩放；图像旋转；图像剪取最近邻；双线性；三次内插值法

Abstract

With the development of digital image technology, digital image processing is widely used in almost all image processing and related fields. Images of geometric transformation in digital image processing is a basic and very important transformation and translation of images, image transform, image transpose, image zoom, image of image rotation, clipping and so on is geometric transformation is one of the most complicated transformation.

I

This paper mainly analyzes the image of several geometric principle, first the interpolation of image transform used processing method, namely: Recently neighbor, bilinear interpolation and cubic interpolation method, were compared. Secondly, it elaborates the principle and characteristics of each algorithm; finally the application of MATLAB software, the image was processed by simulation, through the analysis of the simulation results various algorithms of the advantages, disadvantages and applicable places.

Keywords:MATLAB; image zoom; image rotation; image clipping nearest neighbor; bilinear interpolation method; three

目录

第1章前言- 1 -

1.1数字图像概述 (1)

1.2数字图像几何变换介绍 (2)

第2章图像几何变换理论......................................... - 3 -2.1图像缩放原理...................................................... - 3 - 2.2图像旋转原理...................................................... - 4 - 2.3图像剪取原理...................................................... - 6 - 第3章数字图像几何变换实现............................................. - 7 - 3.1数字图像缩放 . (7)

3.1.1 IMRESIZE函数..................................... 错误！未定义书签。

3.1.2数字图象缩放................................................... - 7 - 3.2数字图像旋转 . (9)

3.2.1 IMROTATE函数..................................... 错误！未定义书签。

3.2.2数字图象旋转.................................................. - 10 - 3.3数字图像剪取 (11)

3.3.1IMCOPY函数 (11)

3.3.2数字图象剪取.................................................. - 11 - 第4章结论............................................................ - 14 - 参考文献............................................................... - 15 - 附录................................................................... - 16 -