超分辨率重建影像Wallis匀光拼接算法  

Wallis Dodging and Mosaic Algorithm for Super Resolution Reconstruction Images

作　　者：范铀 陈旭帅 王丹丹 白明亮 周敏[3,4] 

机构地区：[1]广东南方数码科技股份有限公司,北京100055 [2]湖南畅图信息科技有限公司,湖南长沙410012 [3]中南大学地球科学与信息物理学院,湖南长沙410083 [4]中国葛洲坝股份有限公司测绘工程院,湖北宜昌443000

出　　处：《测绘通报》2018年第2期136-141,共6页Bulletin of Surveying and Mapping

基　　金：国家973计划(2012CB719904)

摘　　要：由于计算机内存的限制,遥感影像的超分辨率重建一般采用分块算法进行处理,重建后的影像由于亮度、反差分布不均匀很难实现无缝拼接。针对超分辨率重建影像无重叠、规则大小的特点,本文提出了一种改进的加权Wallis匀光算法。该方法采用一种新的影像调整顺序,并使用加权法计算匀光参数,可以减少影像调整时误差的空间传递和累积,避免过度计算造成影像信息损失。最后,采用本文方法对900幅超分辨率重建后的资源三号影像进行匀光处理。试验结果表明:该方法能够使大幅面超分辨率重建影像达到亮度、反差一致性,取得了较好的匀光效果,达到了消除拼接缝的目的。A sub-block algorithm is usually applied in the super resolution reconstruction of images because of the limitation of computer memory. However,the sub-block super resolution images can hardly achieve a seamless mosaicking image because of the uneven distribution of brightness and contrast among these sub-blocks. An effectively improved weighted Wallis dodging algorithm is proposed,aiming at the characteristics that images after image super resolution reconstruction are non-overlapping gray images with the same size. The algorithm uses an innovative adjustment sequence,and applies a weighted method to calculate the Wallis filter parameters. It can avoid the spatial propagation and accumulation of errors and the loss of image information caused by excessive computation. Subsequently,the improved method is employed to remove the uneven illumination for 900 SR reconstructed images of ZY-3. The results of experiments show that the method gets better dodging effect. Consistency of image brightness and contrast is achieved,eliminating the seam lines.

关 键 词：超分辨率重建 Wallis匀光 拼接缝 无重叠 拼接缝消除 

分 类 号：P237[天文地球—摄影测量与遥感]