Improved Wallis Dodging Algorithm for Large-Scale Super-Resolution Reconstruction Remote Sensing Images.
A sub-block algorithm is usually applied in the super-resolution (SR) reconstruction of images because of limitations in computer memory. However, the sub-block SR images can hardly achieve a seamless image mosaicking 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 characteristic that SR reconstructed images are gray images with the same size and overlapping region. This algorithm can achieve consistency of image brightness and contrast. Meanwhile, a weighted adjustment sequence is presented to avoid the spatial propagation and accumulation of errors and the loss of image information caused by excessive computation. A seam line elimination method can share the partial dislocation in the seam line to the entire overlapping region with a smooth transition effect. Subsequently, the improved method is employed to remove the uneven illumination for 900 SR reconstructed images of ZY-3. Then, the overlapping image mosaic method is adopted to accomplish a seamless image mosaic based on the optimal seam line.
School of Geoscience & Info-Physics, Central South University, Changsha 410083, China. fanchong@csu.edu.cn.|State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China. fanchong@csu.edu.cn.
Chong
C
Fan
School of Geoscience & Info-Physics, Central South University, Changsha 410083, China. xushuaichen@csu.edu.cn.
Xushuai
X
Chen
School of Geoscience & Info-Physics, Central South University, Changsha 410083, China. leizhong1030@gmail.com.
Lei
L
Zhong
School of Geoscience & Info-Physics, Central South University, Changsha 410083, China. ryumin106@gmail.com.|Geomatics Engineering Investigation of China Gezhouba Group Co., Ltd., Yichang 443000, China. ryumin106@gmail.com.
Min
M
Zhou
Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100083, China. shiyun@caas.cn.
Yun
Y
Shi
Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100083, China. duanyulin@caas.cn.
Yulin
Y
Duan
Wallis dodging; large-scale image; optimal seam line; overlapping region; seam elimination; super-resolution reconstruction