Abstract: Normal methods are restrained to measure the depth of narrow and shallow groove. With dealing with the photographed images of the tube’s surface and the groove’s bottom, a method was put forward to fathom the groove cut on stainless steel tube by EDM, based on light-sectioning method and digital image processing technique. Introduction included the principle of light-sect oning method and steps of processing the digital images were given in detail. Relevant practice shows that the measuring method can attain high accuracy.
Key words: Digital image processing techniqu ; Light-sectioning method; Narrow and shallow groove; Groove’s depth; Fathoming method
