遥感影像镶嵌时拼接缝的消除方法

对现有的影像并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,可以处理彩色和黑白等多种图像。

The Seam-line Removal under Mosaicking of Remotely Sensed Images

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 disadcantages 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 cutlines 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 the 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.