Gradient Magnitude Based Image Classification and Edge Detection for Pattern Recognition in Grayscale Images

Pandi Barita Nauli Simangunsong; Tuti  Andriani; Matias Julyus Fika  Sirait

doi:10.47709/cnahpc.v6i4.4611

Authors

Pandi Barita Nauli Simangunsong Universitas Katolik Santo Thomas
Tuti Andriani Universitas Pembangunan Panca Budi
Matias Julyus Fika Sirait Universitas Budidarma Medan

DOI:

10.47709/cnahpc.v6i4.4611

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Abstract

Image classification is a crucial technique in digital image processing, used in various applications such as object recognition, surveillance systems, and medical image analysis. This research explores the use of gradient magnitude-based edge detection and Robert's Cross methods in improving the classification accuracy of grayscale images. Edge detection is used to identify object boundaries, while gradient magnitude amplifies intensity differences, thus clarifying existing patterns. Through experiments conducted on grayscale images, the results show that this method is able to detect edges with significant accuracy. The gradient values obtained from the combination of Rx and Ry matrices give a strong indication of the presence of edges, which plays an important role in image classification. With an accuracy of 75%, the method proved to be effective, although there are still challenges in dealing with images with high noise or low contrast. The conclusion of this study shows that the combination of edge detection and gradient magnitude is a promising approach for image classification, providing results that can be applied in various domains, including medical and surveillance. Further research is recommended to optimize this approach and extend its application to more complex datasets.

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