Digital image processing
Self-organizing maps
Computer Processing of Line-Drawing Images
ACM Computing Surveys (CSUR)
IEEE Transactions on Pattern Analysis and Machine Intelligence
Shape Detection in Computer Vision Using the Hough Transform
Shape Detection in Computer Vision Using the Hough Transform
Handbook of Computer Vision Algorithms in Image Algebra
Handbook of Computer Vision Algorithms in Image Algebra
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Assessment of raw product quality constitutes one of the most important issues in the agricultural sectors of food production, processing and storage. In wheat grain quality assessment, the evaluation of the percentage of broken grains in a single variety sample is one of the most important criteria. In the present work, we propose a solution based on a computer vision system and neural networks. An algorithm which performs normalization of the size and rotation angle of a single grain image in the log-polar space is developed. The grain edge image is subsequently transformed to the accumulative log-Hough space and projected onto the coordinate system axes. The resulting representation undergoes classification and variety discrimination with the use of the Kohonen Self Organizing Map. The effectiveness of this representation has been verified with the use of a backpropagation neural network and the k-Nearest Neighbors method. The average classification rate within a single wheat variety exceeds 97%, which qualifies the method for practical applications.