Abstract
In this paper, we propose an inspection system of subject with three dimensional surface and volume by image processing using the distribution of brightness and section curves. The distribution of brightness on image depends on the inclination of subject's surface from an optical axis of the camera unit. Therefore, it is possible to inspect the three dimensional surface based on it. The sample is classified into some patterns by the visual inspection of worker. Next, the brightness pattern of a sample is measured, and its standard index is calculated. The weighting coefficient is determined based on the standard deviation of width of bright area on the sample. The volume of inspection subject is measured using a line laser device, and a control chart method is applied to maintain the quality of shape and volume of subjects through the production line. The proposed method is applied to soldering on electric device, and weight of lead in soldering is estimated from the measured volume.
