Abstract: Before we capture 3D video,we may need the cameras with a parallel sensor-shifted setup.In this paper,at first,we discussed the importance of the small shift h of the sensor targets and got formulas to calculate h by the mathematical method.Secondly,we presented a program to flexibly control h by using CMOS image sensor in practice.At last,we proved that the program was right by using a hardware platform designed by ourselves.It is a two-channel video capture and storage system based on FPGA.This platform can make the way of 3D acquisition better and more effective.