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In this paper we proposed a novel stereo recti cation method for dual-PTZ-camera system, which is called spherical rectication. This method can be divided into two parts, of ine pre-settings and online recti cation. The of ine pre-settings include camera calibration and building the spherical coordinate system. The online recti cation only requires the pan, tilt and zoom values and does not need any image information such as feature points. So, compared with traditional rectication approaches,doi:10.1109/icassp.2007.366023 dblp:conf/icassp/WanZZ07 fatcat:4k5b5puajveuta7sx766t5woxa