【摘要】 灰度变换是数字图像处理中一种常见的图像增强技术,它可以实现诸如扩展图像的对比度、拉伸对比度、灰度级分层、图像反转等操作,从而使图像对比度扩展、清晰、特征更加明显.图像点运算是实现灰度变换的常用方法,按照变换函数的不同,点运算可以分为线性和非线性两种.本文总结常见的点运算形式分析其适合应用的情况,并采用matlab软件编程仿真实验,给出实验结论.更多还原

【Abstract】 Gradation of images is usually involved in digital image processing as a commonly used image enhancement technique.It can facilitate operations such as strengthening and stretching image contrast,layering gray levels,and inversing pictures so as to highlight image characters and image contrast.Image point operation is a preferable method to transform grey level of images and with various transformation functions,image point operation can be categorized linear functions and non-linear ones.The article sums up circumstances where common point operations are applied and conducts simulation experiment by using matlab software before it provides results of the experiment.更多还原