American Journal of Applied Sciences

Classification of Breast Tumor in Mammogram Images Using Unsupervised Feature Learning

Aidarus M. Ibrahim, Baharum Baharudin, Abas Md Said and P. N. Hashimah

DOI : 10.3844/ajassp.2016.552.561

American Journal of Applied Sciences

Volume 13, Issue 5

Pages 552-561


In this study, we propose a learning-based approach using feature learning to minimize the manual effort required to extract features. Firstly, we extracted features from equally spaced sub-patches covering the input Region of Interest (ROI). The dimensionality of the extracted features is reduced using max-pooling. Furthermore, spherical k-means clustering coupled with max pooling (k-means-max pooling) is compared with well-known feature extraction method namely Bag-of-features. The resulting feature vector is fed to two different classifiers: K-Nearest Neighbor (K-NN) and Support Vector Machine (SVM). The performance of these classifiers is evaluated to use of Receiver Operating Characteristics (ROC). Our results show that k-means-max pooling, combined with K-NN, achieved good performance with an average classification accuracy of 98.19%, sensitivity of 97.09% and specificity of 99.35%.


© 2016 Aidarus M. Ibrahim, Baharum Baharudin, Abas Md Said and P. N. Hashimah. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.