Instrument reach for peeping at the bore of deep pipe

Based on the CCD imaging device, a video system is presented to detect the inner wall of deep pipe. By LED irradiation, the information of inner wall is detected by CCD camera, which is small view field and large focal length. Then, CCD camera conveys the inner wall information to the computer, by image processing, distinct image is got. At the defects analysis on the inner wall of deep pipe, threshold is found out by adaptive segmentation method, After image segmentation, clear image about the inner wall can be got, finally, the imperfection on the inner wall is quickly located and precision measuring.