Aiming at the problems of high cost,poor temporal and spatial synchronization and low detection accuracy in the detection of ground moving targets by spaceborne dual array cameras,a push-broom imaging method of dual-region linear array camera based on single array CMOS is proposed.CMOS time delayed and integration(TDI)technology is used to window at a fixed position interval to realize dual-region push-broom imaging.For the two-channel data,sequential mode image acquisition is performed to form two independent and complete long strip images.The motion characteristics of high-speed moving targets are detected and analyzed by establishing the time and position functions of the dual-region linear TDI camera.Based on the principle of satellite push-broom earth imaging,a TDI push-broom imaging experimental device is designed and built to detect the velocity of high-speed moving targets.The experimental results show that when the resolution of CMOS pixel is 4 096×3 072,the field of view angle is 16°0′34″,the line frequency is 998 Hz,and the window interval is 3 056 rows,the absolute velocity error is less than 0.445％,and the image motion velocity error is 2.323 pixel/s,which ensures spatiotemporal synchronization,improves the detection accuracy,and verifies the feasibility of the method.
Space remote sensingSpaceborne cameraPush-broom imagingMoving object detection
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