遥感影像镶嵌时拼接缝的消除方法

The Seam-line Removal under Mosaicking of Remotely Sensed Images

对现有的影像拼接缝消除方法的优缺点进行了分析 ,提出了拼接缝消除的强制改正方法 ,并用大量的实际图像进行了试验。结果表明 :所提出的方法具有较好的拼接缝消除效果 ,且算法简单 ,易于实现 。

Image mosaicking is one of the most important tasks in the generation of orthophoto maps,which includes geometric mosaicking and gray seam line removal Geometric mosaicking can be strictly realized in computer according to the theory of Photogrammetry,whereas gray seam line removal is almost not well resolved The focus of the paper lies on the removal of the gray seam lines in the mosaicked image Firstly,the analysis of the advantages and disadvantages of existing methods such as ″ wavelet transform method ″ and ″overlapping image method ″is performed,and then the hard correction method is presented and tested using many real images The main idea of this method is as follows:for every piexl of cut lines in the whole mosaicked image,if it is the left right one,we compute the average gray difference between the pixels within a certain extent of the two sides of the cut line,and then adjust the gray difference to the pixels at a certain extent of the two sides of the cut line;if it is the top bottom one,this operation is done in top bottom sides of the cut line The results indicate that the method proposed above is very effective,simple,easy to realize and fit for gray level and color images