Abstract:

In order to limit the speed of vehicle on highway, an speed measurement system based on CMOS（Complementary Metal Oxide Semiconductor）digital camera with rolling shutter is established and its calibrating technology and speed measurement algorithms are investigated. Rolling shutter digital camera's speed measurement is that using exposure of rolling shutter with a certain delay, producing a certain distortion when take photo of the moving object, and exploiting the image processing techniques to process and calculate the part of the image distortion, then get the speed parameters of the moving object. The camera calibration is the foundation and prerequisite for
 CMOS digital camera measuring speed of the moving object. Based on the principle of the camera imaging, the text analyzes the camera calibration theory. According to the characteristics of the camera's measuring speed, the calibration method fit for speed measurement. Following introduces the methods and procedures of camera calibration experiment, then finishes the experiments. Experimental results indicate that the error of the speed measurement system using this calculation method is within 2.5%. It can satisfy the speed measurement system.

Key words: camera calibration, rolling shutter digital camera, speed measurement