Ebook: Multiresolution Image Shape Description

Much of our understanding of the relationships among geometric struc­ tures in images is based on the shape of these structures and their relative orientations, positions and sizes. Thus, developing quantitative methods for capturing shape information from digital images is an important area for computer vision research. This book describes the theory, implemen­ tation, and application of two multi resolution image shape description methods. The author begins by motivating the need for quantitative methods for describing both the spatial and intensity variations of struc­ tures in grey-scale images. Two new methods which capture this informa­ tion are then developed. The first, the intensity axis of symmetry, is a collection of branching and bending surfaces which correspond to the skeleton of the image. The second method, multiresolution vertex curves, focuses on surface curvature properties as the image is blurred by a sequence of Gaussian filters. Implementation techniques for these image shape descriptions are described in detail. Surface functionals are mini­ mized subject to symmetry constraints to obtain the intensity axis of symmetry. Robust numerical methods are developed for calculating and following vertex curves through scale space. Finally, the author demon­ strates how grey-scale images can be segmented into geometrically coher­ ent regions using these shape description techniques. Building quantita­ tive analysis applications in terms of these visually sensible image regions promises to be an exciting area of biomedical computer vision research. v Acknowledgments This book is a corrected and revised version of the author's Ph. D.

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This book addresses one of the central problems in computer-aided image analysis; how the shape of structures in an image should be represented to best facilitate quantitative analysis. To accomplish this task requires an understanding of what shape is and how it should be extracted from grey-scale images. In Professor Gauch's book a new shape description for grey-scale images called the intensity axis of symmetry (IAS) and an associated curvature-based description called vertex curves are presented.

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This book addresses one of the central problems in computer-aided image analysis; how the shape of structures in an image should be represented to best facilitate quantitative analysis. To accomplish this task requires an understanding of what shape is and how it should be extracted from grey-scale images. In Professor Gauch's book a new shape description for grey-scale images called the intensity axis of symmetry (IAS) and an associated curvature-based description called vertex curves are presented.
Content:
Front Matter....Pages i-x
Introduction and Background....Pages 1-10
The Intensity Axis of Symmetry....Pages 11-27
Computing the Intensity Axis of Symmetry....Pages 29-52
Segmentation via the Intensity Axis of Symmetry....Pages 53-70
Multiresolution Analysis of the Intensity Axis of Symmetry....Pages 71-106
Conclusions....Pages 107-117
Back Matter....Pages 119-131

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This book addresses one of the central problems in computer-aided image analysis; how the shape of structures in an image should be represented to best facilitate quantitative analysis. To accomplish this task requires an understanding of what shape is and how it should be extracted from grey-scale images. In Professor Gauch's book a new shape description for grey-scale images called the intensity axis of symmetry (IAS) and an associated curvature-based description called vertex curves are presented.
Content:
Front Matter....Pages i-x
Introduction and Background....Pages 1-10
The Intensity Axis of Symmetry....Pages 11-27
Computing the Intensity Axis of Symmetry....Pages 29-52
Segmentation via the Intensity Axis of Symmetry....Pages 53-70
Multiresolution Analysis of the Intensity Axis of Symmetry....Pages 71-106
Conclusions....Pages 107-117
Back Matter....Pages 119-131
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