BIME - Volume 7, Issue I

BIME Volume 07 - Issue 1 ICGST

Malignancy Texture Classification in Digital Mammograms based on Chebyshev Moments and Logpolar Transformation

Vibha S. Vyas  and Priti P.Rege

College of Engineering Pune Shivajinagar, Pune-411005, India

Phone: +91-20-25507165, Fax+91-20-25507299

Abstract:

In this paper, an algorithm is proposed for the classification of malignancy in mammogram. The types of malignancy can be classified as circumscribed, speculated, architectural distortion, miscellaneous, asymmetry and calcification. Chebyshev moments (CM), being discrete, are capable to combat the discritisation errors as compared to Zernike Moments (ZM), which are continuous moments. It is also orthogonal and can very well be represented in terms of Geometric moments (GM) to achieve rotation scale and translation (RST) invariant textural analysis. A novel approach to achieve RST invariance using combination of CM and Logpolar coordinate system is proposed. As Logpolar transformation (LPT) is well known for rotation and scale invariance, we need not express CM in terms of GM. The translation invariance is archived by shifting the LPT image to centroid before CM calculation. The average classification rate is compared with Circular Mellin Feature extractors. The images are taken from the Mammographic Image Analysis Society’s (MIAS) Mini-Mammographic database.

Keywords: Chebyshev moments, Logpolar transformation, mammograms, rotation, scale and translation invariance (RST invariance).

(P1160741002, 1.2 MB)

Biography:

 Priti P. Rege Priti Rege received her B.E (Bachelor in Engineering) with distinction in 1983 and M.E degree with Gold medal in 1985, both from Devi Ahilya University of Indore, India. She received her doctoral degree from the Pune University, India in 2002. She is a Professor at College of Engineering, Pune. She has authored/coauthored over 45 research publications in peer-reviewed journals and conference proceedings. She has worked on advisory committee/ program committee of various conferences and also as a reviewer for various journals.  She has also worked as chairperson at various sessions in National and International conferences. She is a Senior Member of IEEE, Life member of Institution of Electronics and Telecommunication Engineers, India, Life member and Convener of Biomedical Engineer’s Society of India. She has edited “Trends in Process Instrumentation and control”, proceedings of International Conference on Instrumentation INCON 2005. Her research interests include, Digital Watermarking, Texture Analysis, Optical character Recognition, Document enhancement and 3-D volume rendering. She has contributed in research projects funded by Government and Industries and has also received fellowship for carrying out research in the field of image processing.

Vibha S. Vyas received the BE degree in 1995 from Nagpur University and ME Degree from Pune University in 2002. She is currently a PhD student at the University of Pune. Under the guidance of Dr. Priti P. Rege, she is pursuing research in the field of geometric transform invariant texture analysis. At present, she is serving as Assistant Professor at Electronics and Telecommunication Engineering Department of College of engineering Pune, which is an autonomous institute of Government of Maharastra. Her areas of interests are pattern recognition, texture analysis, signal processing and coding schemes. Several publications are there on her name.

 

BibTex:

@ARTICLE{P1160741002,

AUTHOR = {Vibha S. Vyas and Priti P.Rege},

TITLE = {Chebyshev Moments Based Texture classification of Malignant Masses in Digital Mammograms},

JOURNAL =  {ICGST International Journal on Bioinformatics and Medical Engineering, BIME},

YEAR = {2007},

VOLUME = {7},

ISSUE ={1},

PAGES={29--35}

}

(P1160741002, 1.2 MB)