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三维重建在猪胴体体型特征提取中的应用

作  者:
任兴超;郑丽敏;任发政;朱虹;吴平;田立军;郭慧媛
单  位:
中国农业大学信息与电气工程学院;国家知识产权局专利局专利审查协作北京中心;中国农业大学食品科学与营养工程学院
关键词:
三维重建;立体匹配;图像处理;猪胴体体型特征;摄像机标定
摘  要:
为提高猪胴体自动化定级的准确性,利用双摄像机构建了三维重建系统对猪胴体定级所涉及的胴体特征进行提取,该系统通过胴体图像处理、摄像机标定、基于极线约束的立体匹配、三维坐标计算等步骤对猪胴体特征部位进行了三维重建。三维重建得到的胴体1/2处横长的特征值相对于其真实值的误差小于5%,而利用单一图像获取的该特征值的误差为10%;胴体6~7肋处膘厚的三维重建的结果相对于其真实值的误差小于8%,而利用单一图像获取的该特征值的误差为20%;表明猪胴体体型特征值的三维重建结果比从单幅图像中提取更贴近实际值。
译  名:
Applications of 3D Image Reconstruction for Extracting Pork Carcass Characteristics
作  者:
REN Xing-chao;ZHENG Li-min;REN Fa-zheng;ZHU Hong;WU Ping;TIAN Li-jun;GUO Hui-yuan;Patent Examination Cooperation Center of the Patent Office,State Intellectual Property Office of the P.R.C;College of Information and Electrical Engineering,China Agricultural University;College of Food Science and Nutritional Engineering,China Agricultural University;
关键词:
3D reconstruction;;stereomatching;;image processing;;extraction of porkcarcass characteristics;;camera calibration
摘  要:
This paper presents a method for building 3D models of pork carcass characteristics to improve the accuracy in the automatic grading systems based on 2D images.The 3D models were established from carcass images taken from different viewpoints through image processing,camera calibration,stereomatching based on epipolar constraint and 3D coordinates calculation.For the data of half carcass length,the results of 3D reconstruction hada total relative error of 5%,while 10%obtained from a single image.For fat between the 6th and the 7 thribs,the results of 3 Dreconstruction had a total relativeerr or smaller than 8%,whereas the relative error obtained from a single image was a shig has 20%.Thus 3 Dreconstruction gave results more similar to the actual values than those extracted from a single image.

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