A laser line profile extraction method to avoid interference from welding fumes

Abstract

This invention discloses a method for laser line contour extraction that avoids interference from welding fumes, relating to the field of laser line measurement technology. The method includes the following steps: Step 1: Create and initialize a template contour T; Step 2: Acquire a laser line image; Step 3: Extract the laser contour line P; Step 4: Determine if the anti-smoke function is enabled; Step 5: Traverse the points in the laser contour line P and determine the accuracy of the current point Ai; Step 6: If the current point Ai is an abnormal point, find the point Ti with the same index in the template contour T; Step 7: Correct the abnormal point Ai based on the information surrounding point Ti; Step 8: Update the template contour T with the points Ai that are not abnormal in Step 5 or the points Ai that are abnormal in Step 7 after correction, and traverse the laser contour line P using the methods in Steps 5, 6, and 7; Step 9: Output the contour P and return to Step 2. This invention utilizes contour information prior to the appearance of fumes to correct contours interfered with by fumes, thus quickly and effectively reducing the impact of welding fumes on laser line extraction.

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