数字农科院2.0

Body parts segmentation and phenotypic traits extraction of pig using an improved point cloud segmentation network with multi-LiDAR

文献类型： 外文期刊

作者： Yehao Jiang;Zechen Li;Jusong Cao;Xuan Li;Xiaoyong Du;Xiong Xiong;Xinyun Li;Haiyan Wang

作者机构：

关键词： （0-1-4）3D reconstruction;Computer vision;Deep learning;Point-cloud semantic segmentation

期刊名称： Computers and Electronics in Agriculture

ISSN： 0168-1699

年卷期： 2025 年 237 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Precise and efficient acquisition of pig phenotypic traits is becoming increasingly essential in modern pig breeding and management. With the advancement of three-dimensional(3D) reconstruction technology, the automated collection of phenotypic parameters, is becoming increasingly feasible. Owing to the scene adaptability limitations of depth cameras and the influence of pig movement, mainstream point-cloud-based methods face limitations with incomplete and irregular point-cloud data, which affect the accuracy of body dimension measurements. Comparatively, LiDAR can accurately acquire point-cloud data with a field of view. Furthermore, Point-cloud segmentation technology enhances the accuracy and robustness of phenotypic parameters, calculations by dividing the point-cloud data into different regions. This study proposes an efficient pig phenotypic parameters extraction method within commercial pig farms based on a point-cloud segmentation network with Multi-LiDAR. First, we built a data collection platform using two LiDAR sensors with superior synchronization and reliability to produce high-quality point-cloud data for pigs. Second, we proposed an improved point-cloud segmentation network named PointVector++ to segment the pig point-cloud data to extract parts of the pig body. The improved model integrates a learnable downsampling module and the VPSA++ module, enhancing the rotation invariance, density balance, and feature adaptability to handle complex point sets effectively. Finally, a phenotypic parameters calculation algorithm for 10 key metrics was developed based on different parts after segmentation. Experiments were conducted using point-cloud data from 150 live pigs to evaluate the segmentation and phenotypic parameters assessment performance. The PointVector++ model achieved an mIoU of 90.5 % on the pig dataset. In 10 metrics, the body length, chest width, hip width, abdominal width, and hip height exhibited high accuracy, with an MAE and MAPE below 3.61 cm and 6.88 %, respectively, and R2 values exceeding 0.64. This method can effectively partition pigs, extract body dimension information, and provide a novel approach for the automated acquisition of pig phenotypic traits.

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