Leak point localization systerm for closed vessel based on infrared image processing

In this paper, a device for closed vessel's leaking localization is introduced based on infrared image processing. After the infrared thermography captured multi-frame infrared images of the closed vessel with cooling gas, each frame of the ROI region is processed by Gauss filtering. The suspected leak points are detected by hough circle detection method after their edges in the ROI are extracted by using canny edge operator. Finally, the appearance probability of the suspected leak point is used to determine a leaking point. Experiments show that the proposed method overcomes the disadvantage of infrared image's higher level noise effectively and is able to accurately localize the leak points.