A real-time two-dimensional correlation speed measurement based on image

In order to implement two-dimensional moving object´s non-contact and real-time speed measurement, in this paper, we proposed a new method which was based on the characteristic of FPGA and a real-time two-dimensional correlation speed measurement was proposed on image processing using high speed CMOS shown in figure 1.Experimental installation was shown in figure 2,a cardboard with images which was fixed in electric control movement device was moving to simulate moving object, the CMOS image sensor gathered image signals of the cardboard and the image signals was output to FPGA after a serials pretreatment such as binaryzation etc. Logical operation insteaded mathematical operation on FPGA to implement two frames image´s cross-correlation operations as the formula (10) in this paper, and finally calculate the two-dimensional velocity. Through experiment result of table 1 we drawn an conclusion the accurarcy of the method in this paper was less than 1 pixel and the method can be used at a certain speed ranges of two-dimensional, real-time speed measurement.