Abstract
Real-time quality inspection of gelatin capsules in pharmaceutical applications is an important issue fro m the point of view of industry productivity and competitiveness. Computer vision-based automatic quality inspection is one of the solutions to this problem. Machine vision systems provide quality control and real-time feedback for industrial processes, overcoming physical limitations and subjective judgment of humans. In computer-vision based system a digital image obtained by a digital camera would usually have 24-bit color image. The analysis of an image with that many levels might require co mplicated image p rocessing techniques. But in real-time applicat ion, where a part has to be inspected within a few milliseconds, either we have to reduce the image to a more manageable nu mber of gray levels, usually two levels (binary image), and at the same time retain all necessary features of the original image. A b inary image can be obtained by thresholding the original image into two levels. In this paper, we have developed an image processing system using edge-based image segmentation techniques for quality inspection that satisfy the industrial requirements in pharmaceutical applicat ions to pass the accepted and rejected capsules.
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