摘要
数字图像处理是一种通过计算机采用一定的算法对图形图像进行处理的技术。介绍了小波变换在图像压缩中的应用,并对小波进行多级分解测试,介绍其原理及方法;在此基础上实现图像复原技术,用区域搜索任意选取图像原始区域和篡改区域,用相位相关法来匹配图像,再对图像信息进行融合,这样对图像进行运动模糊、加噪等操作后均可恢复到原始图像,而且对图像进行区域复制粘贴篡改操作后也有很好的复原效果。与维纳滤波复原和中值滤波复原分别进行对比研究,发现该方法对图像的任何操作均可恢复到原始图像,复原的图像非常清晰。
Digital image processing is the technology adopting a certain algorithm to handle with the graphic image through computer. The application of wavelet transform in image compression is introduced,the multilevel decomposition of wavelet is tested and the principle and the method are given.The image restoration technology is realized.The original area and the tampered region of any images with region search, matched the images using the phase correlation method, made fusion using image information,the images of motion blur,adding noise and other operations could be restored to the original images,and after regional copy-paste tampering to the image a good restoration effect could be done.Compared with Wiener filtering restoration and the Median filtering restoration respectively,any operation done to the image could be restored to the original image and restored image was very clear by applying the proposed method.
出处
《黑龙江大学工程学报》
2014年第4期69-75,共7页
Journal of Engineering of Heilongjiang University
关键词
图像处理
图像复原
小波变换
相位相关法
image processing
image restoration
wavelet transform
phase correlation method
