基于NI FlexRIO的图像实时采集及处理系统

Real-time image acquisition and processing system based on NI FlexRIO

为了解决视觉测量中图像的实时采集及处理问题,以NI FlexRIO为基础,采用虚拟仪器技术,利用LabVIEW图形化开发平台,并结合相关技术知识,如乒乓操作、流水线技术等,研制了一套图像实时采集及处理系统。该系统并行地实时地实现了图像的采集、存储及处理,在图像分辨率为1 280×1 024、采集速率为500f/s的情况下,系统工作稳定,图像处理速度小于2ms,并且处理精度达到了亚像素级。该系统对于实现视觉测量的实时性具有重要意义,并且其良好的性能使其在其他相关领域也具有很高的实用价值。

To solve the problem of real-time image acquisition and processing in visual measure- ment, a system, based on NI FlexRIO, was developed with virtual instrument technology by using LabVIEW graphical development platform, in which related techniques, such as ping pong operation, pipelining technique, etc, were applied. The system could implement image capture, storage and processing in parallel and real-time. While the accessed image resolution was 1 280×1 024 and the sampling rate was 500 f/s, the system worked stably. In the process, the time of image processing was less than 2 ms, and the precision could reach the level of sub-pixel. The system is significant for visual measurement to be implemented in real- time, and it is also highly valuable in other relative fields for its good performance.