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Document Type

Thesis - University Access Only

Award Date


Degree Name

Master of Science (MS)


Electrical Engineering and Computer Science

First Advisor

Sung Y. Shin


Breast cancer classification technique divides breast cancer into two categories, benign tumors and malignant tumors. The main purpose of breast cancer classification is to classify abnormalities into benign or malignant classes and thus help physicians with further analysis by minimizing the possible errors that can be done because of fatigued or inexperienced physician. Irregular shape is one of the most frequently appearing feature for the malignant masses which can be used to identify breast tumor as benign or malignant. The main objective of this thesis is to introduce new improved shape features that can be used to classify mammogram images into normal (benign) or cancerous (malignant) classes with better classification accuracy compared to that of traditional ones. In this paper, we propose five new shape features variance and range based on measures of variability, convexity index, circularity range ratio and irregularity ratio to effectively classify breast cancer images. Support Vector Machine (SVM) is then used as a machine learning tool to train data first and then classify breast cancer images. The main contribution of this paper is to improve the classification accuracy method over existing traditional shape features. A total of 500 images obtained from ix DDSM (Digital Database for Screening Mammography (DDSM, University of South Florida) with a total of 300 training and 200 test cases. Firstly, binary object images were extracted from actual breast mammograms using Support Vector Machine. In order to evaluate the improved performance of the proposed shape features, convexity, circularity and a modified global shape feature of compactness was used. The result obtained shows that the proposed shape features can improve measure of performances such as MCC, specificity, sensitivity and accuracy and can be a promising tool to provide preliminary decision support information to physicians for further diagnosis.

Library of Congress Subject Headings

Breast -- Radiography
Breast -- Imaging
Breast -- Cancer--Diagnosis
Image processing -- Digital techniques
Image analysis
Medical-- Digital techniques


Includes bibliographical references (pages 41-48)



Number of Pages



South Dakota State University


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