Mai Jiang

Fast camera calibration technology applied to helicopter blades pyramid angle measurement

This paper presents a new method applied to helicopter blades pyramid angle measurement system based on CMOS technology, the overall design scheme of the system is offered and the imaging error is analyzed. Based on similarity criterion, the calculation methods on some critical components parameters of the helicopter dynamic balance test platform model are introduced. Provides a concise and rapid calibration method on the camera intrinsic parameters and the algorithm method is introduced. Design the image processing software based on the filter and edge detecting technology. Finally give the experimental results and tested the measurement systems accuracy within 1.5mm.

Helicopter blades observation system with a moving camera

This paper mainly studies the problems of helicopter blades detection and tracking in image sequences acquired by a moving camera, it presents a method of background motion compensation and difference based on block matching technique. As proved by experiments, the method not only eliminates the bad effects of camera moving to object detection, but also the target extracted from real-time images is relatively entire. Through the method combined with image symmetry difference, the thesis designs a method of moving target tracking based on moving camera. The experiments of rotating blades in complex background show that the results of tracking targets appear relatively good. The method can track the target in a small sight angle, and it has some functional values to a degree in a video surveillance system with a single camera.