Research on Measuring Method of Ball Indentation Based on MATLAB Image Edge Detection

Ball pressure test is an important test to evaluate the heat resistance of non-metallic materials. At present, most of the tests are judged by manual measurement, with low accuracy. In this paper, the digital image measurement technology of MATLAB is used to transform and enhance the collected indentation image. The Gaussian Laplace operator is used to detect the edge of the image, find the maximum value of the coordinate difference between each element point on the image edge and other element points, traverse all the element points on the image edge, and put the obtained maximum value into the maximum value array; continue to find the maximum value in the maximum value array to obtain the diameter of the ball pressure indentation image, thus improving the measurement accuracy and realizing the intelligent measurement of the diameter of the ball pressure detection image.