奶牛体型评定三维图像同步采集系统

3D Synchronization Imaging System for Linear Appraisal of Dairy Cow Conformation

设计奶牛体型评定三维图像同步采集系统,采用集散控制结构协调奶牛定位设备、图像采集装置按预定时序工作,应用3个CCD彩色摄像机与具有多通道、多独立图像芯片的DH-QP300型图像采集卡,实现了奶牛三维图像同步采集;采用LabVIEW软件作为采集主程序,通过调用动态链接库控制通用图像采集卡,选用场方式采集模式提高图像质量。试验证明,每头奶牛的图像采集与线性评定时间在3 min左右,小于5 min(标准)。图像噪声较少,边缘信息清晰,完全满足后续特征提取算法对图像质量的要求。

3-D synchronization imaging system was developed to realize isochronous acquisition of 3-D images of dairy cow. Distributed control structure has been adopted to correspond orientation device and imaging equipment so that they could work according to schedule. Three CCD color video camera and one DH- QP300 4-channel color frame grabber were adopted to realize isochronous grabbing of 3-D images of the dairy cow. LabVIEW software has been applied to transfer dynamic link libraries to control current frame grabber, single field grabbing mode was adopted to improve image quality. The experimental result showed that the time of images acquisition and linear appraisal is about 3 min, which is less than the standard time 5 min. And the images quality with clear edge and light noise could satisfy the requirements of continued feature extraction algorithm.