I.4.7[Computing Methodologies]Image Processing and Computer Vision – Feature Measurement..pdf

Shape Based Retrieval in NHANES II 1 1 1 Hemant D. Tagare , Xiaoning Qian , Robert K. Fulbright , Rodney Long2 and Sameer Antani2 1 Yale University, New Haven, CT 06510, USA 2 National Library of Medicine, Bethesda, MD 20894, USA Categories and Subject Descriptors: H.2.8[Database proxy for the grade of the osteophyte. Given a query image, Management]:Image Databases – Medical Image Databases, we seek to retrieve all images with vertebrae that have a I.4.7[Computing Methodologies]:Image Processing and Com- similar shape. We expect that the retrieved vertebrae will puter Vision – Feature Measurement. have grades that are similar to the query vertebra. Further- General Terms: Algorithms, Performance. more, independent of osteophyte grade, retrieval by shape Keywords: Image Databases, Shape Space, Shape Index- is important in itself as a query mechanism. ing. This paper is intended to be a review paper summarizing our recent work on shape based retrieval. ABSTRACT NHANES II is a nationally significant medical image database of spine x-ray images located at the National Library of Medicine. A key feature of spine disease in these images is the presence of osteophytes