图像旋转算法研究毕业设计.docx

河南农业大学本科生毕业论文题目图像旋转算法研究_ 学院理学院_ 专业班级 11级电子信息科学与技术_ _(信息安全专门化)1班_ 学生姓名雷盼盼指导教师朱连轩撰写日期: 2015 年 05月 28日河南农业大学本科毕业生论文图像旋转算法研究雷盼盼摘要图像旋转是图像处理中几何变换部分较复杂的一种,通过对图像旋转的基本原理分析,图像的旋转变换包括坐标的几何运算赋值和对运算结果的插值处理两个方面。运算结果赋值包括正向映射和反向映射,为了避免有未被赋值“空”像素的产生,在图像旋转中一般采用反向映射法。现代的插值算法包括线性和非线性插值、有理插值、曲面重构和自适应区域插值等,但很多算法都由于过于复杂难于在硬件上实现,在硬件上实现常用的插值算法有最近邻插值算法,双线性插值算法, 双三次插值算法等。为了解决图像旋转之后出现的空洞点问题,本文详细介绍了图像旋转中常用的差值方法:最近邻插值法、双线性插值法和双三次插值法,并通过对同一幅图像分别利用三种插值算法进行旋转 30° 的仿真实验,总结每种算法的特点,通过比较和分析,从而得出在进行图像旋转时,应根据不同的用途和效果选用适合的算法。关键词: 图像旋转;正向映射法;反向映射法;插值算法河南农业大学本科毕业生论文 Image rotation algorithms research LEI Pan-pan Abstract Image rotation in image processing isa part of plex geometric transformation, by analyzing the basic principle of image rotation, the rotation of the image transformation including the coordinates of the geometric operations assignment and interpolation processing two aspects of the operation result. Operation results assignment including forward mapping and reverse mapping, in order to avoid "empty" has not been assignment pixels, reverse mapping monly used in the image rotation. Modern interpolation algorithm including linear and nonlinear interpolation, rational interpolation, the interpolation curved surface reconstruction and adaptive area, etc. but many algorithms are plex to on hardware implementation, on the hardware implementation monly used interpolation algorithm with nearest neighbor interpolation algorithm, bilinear interpolation algorithm, double three interpolation algorithm, etc In order to solve the problem of empty point of the image rotation, this paper introduces in detail the image rotation difference method monly used in: Nearest neighbor interpolation method, bilinear interpolation method and double three interpolation method, and based on the same image respectively by using three kinds of interpolation algorithm for the simulation experiment of 30° rotation, summarizes the characteristics of each algorithm, through parison and analysis, and concluded in the image ro