Dimensional deviation measurement of ceramic tiles according to ISO 10545-2 using the machine vision

摘要

In this paper, machine vision method is used for dimensional deviation measurement of ceramic tiles according to the International Standard Organization (ISO) 10545-2. Generally, in the ceramic tile production lines, the quality control is conducted by operators, that is, a tedious, erroneous, and time-consuming work. In this study, a stereo vision scanner was established which is not based on the judgment of human operators. Firstly, only a pair of images with two cameras of stereo vision system was taken. Then, the images were transferred to the computer and running the image-processing operations. Finally, the dimensional deviation measurement of all desired ISO parameters including the straightness of sides, rectangularity, side curvature, center curvature, and warpage was done simultaneously. The experimental results showed that the machine vision technique can be used for dimensional measurements of ceramic tiles more accurately than the desired accuracy determined by ISO 10545-2.