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中文摘要：
针对某型航侦CCD相机图像序列之间的特殊变换关系,提出了一种基于目标直线边缘交点的图像拼接方法。该方法在将相机图像重叠区域分割为较小独立区域的基础上,首先使用Canny边缘检测算子提取各个区域中的边缘信息,并用Hough变换提取边缘中的直线边缘。其次通过提出一种依据直线极坐标参数的区域扩展和选择策略来选择包含完整目标的子图像区域,并提取该区域中目标直线边缘的交点。最终根据提取到的直线边缘交点坐标实现图像配准,且采用双线性插值法融合配准区域,实现了图像的无缝拼接。实际的飞行效果验证了该图像拼接方法的有效性。
英文摘要：
An image mosaic method of object straight edge nodes was proposed by the unique transformation relation between the image sequences of one aerial reconnaissance CCD camera.In that scheme,overlap area of images were first segmented into smaller sub-images independently,and Canny edge detection operator was employed to extract the edge information from each single area,then straight edges from the obtained edge information were also derived by Hough transform.Moreover,a strategy of area expanding and selection was proposed to extract the straight edge nodes,and it was applied to keep the segment area containing an effective object.Finally,image registration was finished according to the obtained straight edge nodes,and seamless mosaic image could be achieved by bilinear interpolation method.The actual mosaic results are also presented to verify the effectives of the proposed image mosaic approach.
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