【作者】 林贻斌；

【导师】 张宝峰；

【作者基本信息】 天津理工大学 ， 检测技术与自动化装置， 2005， 硕士

【摘要】 现今机器视觉技术的应用受到越来越广泛的关注。普遍采用的三角法存在着摄像机内外参数标定繁琐困难的缺点,为此,采用了一种简单易用的视觉检测方法——对映函数法,作为视觉检测的算法。在具体的实现过程中,做了以下的工作和创新:1、对于对映函数法进行深入的研究和探讨,并撰写程序实现该视觉检测算法,对其可行性和有效性进行充分的研究论证。2、自行设计开发出一套用于检测的视觉传感器,给出组成传感器的各元件的设计关键要素。3、为实现传感器内各元件之间的精确定位,开发出一整套的校正流程,并撰写相应的软件实时检测验证,确保传感器的最终精度。4、对视觉检测中所用的一些关键技术进行深入研究。给出激光条纹中心提取的方法。利用hough变换结合最小二乘线性回归法,求出激光十字线的中心,实现亚像素检测,极大提高检测精度。利用自行设计的视觉传感器,通过对映函数视觉检测算法,建立起来的空间坐标和摄像机像面坐标之间的对映关系,最终实现了对物体三维轮廓的检测,并利用surfacer软件对最终的检测精度进行了分析。更多还原

【Abstract】 Today, the application of Machine Vision have attracted more and more attention. The triangle law,which has been adopted extensively, is difficult to determine the internal and external parameter of the camera. For this reason ,the study adopted another simple and wonderful vision detecting method——mapping function method. In the process, we has finished some work and brought some innovation as following:1、Carried on deep research and discussion to the mapping function method, and achieved the vision measures algorithms with program, and demonstrated the algorithms’feasibility and validity .2、Designed and developed a suit of vision detecting sensor by self, and bring the designing key elements of every component of the sensor.3、To obtain the accurate localization between every component in the sensor , develop a whole set of design procedure, write the corresponding software to measure in real time , guarantee the final precision of the sensor.4、Carry on further investigation on some key technology of the vision measuring . Provide the method to draw the centre of the laser stripe. Utilize hough transform and the least square linear regression, obtain the center of the laser cross curve , achieve the subpixel measuring, improve the precision of measuring greatly.By our vision sensor, we build up the relationship between the space coordinates and the camera image coordinates with the mapping function method, and accomplished the 3D profile measuring finally, Then analyze the final precision of measuring by surfcer software.更多还原