Abstract
Material handling is one of the most important components in manufacturing industries. Conveyor belts belong to one of the material handling equipment categories that move objects and connect distant sections of a manufacturing process. This paper proposes an integrated approach of deep-learning object recognition in a packaging conveyor for real-time automatic object counting, shape detection, and color description. The deep neural network model was built in TensorFlow by using the Single-Shot Detection (SSD) method and Feature Pyramid Network (FPN) extraction. The model was improved by implementing k-means clustering and k-nearest neighbors algorithms in the object detection and color description. The novelty of the research is the implementation of deep learning with three integrated features in a manufacturing-related process. A prototype of a packaging conveyor was constructed to function as a miniature manufacturing process. The proposed system's accuracy was evaluated in terms of object counting, shape detection, and color description. Test objects varied in 2 different shapes (cube and box) and three different colors (blue, orange, and green). The average accuracy of the proposed system is 93.7% in object counting, 97.2% in shape detection, and 77.5% in color description, with an overall average accuracy of 90.0%. The color description was found to be sensitive to illumination level. Future improvements for the color descriptor's accuracy include creating a specific color data set and covering data with various illumination levels.
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