Abstract

In this paper, we established a computer vision system for missing tablets detection in pharmaceutical industry during the manufacturing process. The images of blister pack with tablets in RGB color format were acquired by using a CCD industrial color camera on the industrial assembly line in real time. In order to reduce the effect of environmental brightness, the obtained RGB format images were transformed into HSI color format. According to the threshold of the hue and saturation, the image segmentation was carried out. Then, the tablets could be identified and determined. The Canny edge detection and Hough circle detection was used to mark the locations of tablets. Based on the locations and number of circles, the location of the missing tablets was obtained. This computer vision system could boost efficiency, reduce the cost of labor, and guarantee the safety of drug consumers.

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