s: This paper mainly uses the ground three-dimensional laser scanning technology to collect the date of two coal mining deformation point cloud. First of all, according to the distance measurement precision and scanning point spacing scanning scheme is designed; then, focuses on the analysis of scanner splicing error; finally, through three ways : dot, line, face; we do compare analysis to two deformation and obtain the deformation results of the entire mining area. The experimental results show that: three-dimensional laser scanning technology has these advantages: high work efficiency, high data accuracy, obtaining the deformation data of subsidence zone of the whole basin.
Abstract. Windows CE API interception technology can be used for monitoring various system services calls such as file systems, registry. API interception has a very important role on the Windows CE system software debugging and performance analysis. This paper introduces the main methods of the Windows CE API interception, discusses a number of key technologies involved, how to use these methods flexible, and gives a practical example.
For the universality of computer vision in the automatic detection of pointer instrument, an OpenCV-based automatic detection system for automobile meter was proposed and realized. The original video image was pre-processed through the filtering and SURF algorithm was used for the registration of template and test instruments to obtain the transformation parameters. Pointer and dial were treated respectively. Through the gray-scale images subtraction, Canny edge extraction and Hough line detection, the straight line where the pointer was obtained rapidly. Then the pointer readings were obtained through functional relation between the point angle and actual value. Experimental results show that this system can be used to conduct the real-time and automatic detection of different types of meters.
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