A small baseline stereo matching method based on extended phase correlation is proposed to obtain high precision sub-pixel disparity for small baseline photogrammetry.The multi-step strategy is adopted in this method.Firstly,the integer pixel disparity is calculated by an adaptive support window local matching method.Then the relationship of corresponding points is established under the guidance of integer pixel disparity.The sub images are extracted through selecting the corresponding points as the center.Finally,the sub-pixel disparity is obtained by matching the sub images utilizing an extended phase correlation matching method.The experiments are carried out by using the small baseline stereo image pair and artificial synthesis stereo image pair with sub-pixel disparity,the results show that the small baseline stereo matching method based on extended phase correlation has superior performance on precision and efficiency.%为获得高精度亚像素级视差以满足小基高比摄影测量需求,提出一种基于扩展相位相关的小基高比立体匹配方法.该方法采用分步式策略,首先利用自适应窗口匹配法计算整像素级视差,然后在整像素级视差的指导下建立同名像点之间的对应关系,再分别以左右同名像点为中心截取子图像,最后利用扩展相位相关匹配法对子图像进行亚像素级匹配,获得亚像素级视差.采用小基高比立体像对和带有亚像素级视差的模拟立体像对进行实验,结果表明基于扩展相位相关的小基高比立体匹配方法在精度和效率方面具有优越性能.
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