图像匹配中噪声分析和预处理

Image Noise Analysis and Pre-processing for Pattern Match

提出和证明了在三坐标测量机单镜头三维视觉系统中的图像噪声主要有 3种 :1)电磁干扰噪声 ;2 )季节、气候和时间变化引起的噪声 ;3)物体的位置和视角变化引起的噪声。提出了减少和消除噪声的预处理方法。理论分析和实验均表明 ,该方法具有简便。

This paper explains an image pre-processing methodology when using a single-camera 3D vision system for a CMM positioning. Three types of noise, mainly caused by 1) electromagnetic interference 2) season, weather and time changes and 3) object position or view angle changes, are classified and analyzed. Based on the analysis pre-processing measures are proposed and employed to minimize the influences of noise. Theoretical analysis and experiments show that the methodology has the advantages of simplicity, efficiency and robustness.