低辐射车辆检查装置图像处理关键技术研究

Critical technology research on image processing for low radiation vehicle inspection equipment

低辐射成像技术应用于车辆检查存在着诸多技术难点,如归一化、对数变换、动态范围变换、探测器等工作的不稳定所引起的干扰等问题。本文结合实际应用,对数据处理过程中的若干关键技术做了分析并提出了相应的解决方案。针对由放射源位置变动造成的计数涨落,采用了动态本底技术。经现场测试,取得了很好的效果。

Background： Normal green channel vehicle inspection methods have many flaws, such as low efficiency and long time expense. The accuracy depends on the experience of inspector and it can not meet the online inspection. Purpose： The aim is to develop a new method which can help the inspector to promote the vehicle inspection speed and accuracy. Methods： Using real time image processing and control system, a new imaging system was developed. Results： The actual test shows that the inspection time can be reduced to less than one minute and the inspectors can also be reduced to one or two persons. Also the inspection accuracy is greatly improved. Conclusion： The imaging system achieves good effect through actual tests.