Centroid sensitivity of wavelet-based shape features

Lori Mann Bruce

doi:10.1117/12.304886

26 March 1998 Centroid sensitivity of wavelet-based shape features

Lori Mann Bruce

Proceedings Volume 3391, Wavelet Applications V; (1998) https://doi.org/10.1117/12.304886
Event: Aerospace/Defense Sensing and Controls, 1998, Orlando, FL, United States

Abstract

Many shape features are based on a 1D function known as the radial distance measure (RDM). These include its mean, standard deviation, zero crossings, entropy, and roughness index. Recently, wavelet-based features, computed via the RDM, have been sued for object shape recognition. In particular the RDM scalar-energy feature is used in this study. We analyze the effects of centroid errors on the RDM- based feature measures listed above by measuring their mean- square-errors. The error analysis is conducted on a set of 60 images consisting of simplistic shapes: ellipses, triangles, rectangles, and pentagons. The error analysis is also conducted on a set of mammograms where mammographic lesions are to be discriminated into the shape classes: circumscribed, irregular, and stellate. These shape classes are typically used to aid in the classification of lesions as either benign or malignant. Sixty pre-segmented mammographic lesions are used in this analysis. A minimum distance classifier is used to classify the lesion shapes. The effects on the traditional feature vectors are compared with the wavelet-based feature vectors. Lastly, the effects of centroid errors are analyzed with respect to classification rates.

Citation Download Citation

Lori Mann Bruce "Centroid sensitivity of wavelet-based shape features", Proc. SPIE 3391, Wavelet Applications V, (26 March 1998); https://doi.org/10.1117/12.304886

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available