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针对推扫式遥感相机前后摆成像中焦面拼接的CCD其像片间出现视场漏缝的问题,提出了一种焦面CCD的非均匀重叠像元数机械拼接方法。首先,构造了相机前后摆的成像原理模型;接着,分析了CCD间产生地面视场漏缝的原因,并依据模型推导出相机前摆和后摆时各CCD视场间漏缝大小的数学公式,从而得到各片间容许的最少重叠像元数量公式。在此基础上,进一步给出了后续电子学图像拼接与配准中片间重复像元数的函数形式,为实现图像无缝拼接提供了软件实现依据。分析表明,该方法的理论误差ε小于一个像元尺寸,即|ε/D|<1。最后,给出了工程应用实例。
Aiming at the problem of field of view leakage between the CCD images of focal plane in front and back imaging of push-pull remote sensing cameras, a non-uniform overlapping pixel number mechanical splice method for focal plane CCD is proposed. First, the imaging principle model of the camera is constructed; Then, the reason of the ground view field leakage caused by the CCD is analyzed. Based on the model, the mathematical formula of the leakage between the CCD field and the front and back of the camera , So as to obtain the minimum number of overlapping pixels that can be tolerated among the slices. On this basis, the functional forms of repeating pixel numbers between subsequent electronic image mosaic and registration are further given, which provides the basis for software implementation for seamless image stitching. The analysis shows that the theoretical error ε of this method is less than one pixel size, ie | ε / D | <1. Finally, an example of engineering application is given.