遥感彩色影像镶嵌拼接缝的消除方法研究

对遥感影像拼接缝消除方法存在的问题进行了分析,提出了基于色度空间变换和动态宽度的遥感彩色图像拼接缝消除新方法。在HLS色彩空间,从色度、亮度和饱和度三个方面对拼接缝两侧像元值差异进行消除后,再转换为RGB彩色图像,并用4幅彩红外航空遥感图像进行了试验。研究结果表明,所提出的方法对于遥感彩色图像拼接缝消除具有较好的效果,算法简单、易于实现。

Study on the Seam-line Removal under Mosaicking of Remote Sensing Color 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,especially for seam-line of color images.The focus of the paper lies on the removal of the seam-lines in the mosaicked color images.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 based on color spatial transform and dynamic width for color images is presented and tested using four color-infrared aerial remote sensing images.In HLS color spatial,the value of pixels of cutting lines in the whole mosaicking image is removed in hue,luminance and saturation.The experiment indicates that the method proposed above is very effective,simple and easy to be realized.