Detection of generalized principal axes is rotationally symmetric shapes
Pattern Recognition
Machine vision
Multigrid Convergence of Calculated Features in Image Analysis
Journal of Mathematical Imaging and Vision
Visual Identification by Signature Tracking
IEEE Transactions on Pattern Analysis and Machine Intelligence
Line Moments and Invariants for Real Time Processing of Vectorized Contour Data
ICIAP '95 Proceedings of the 8th International Conference on Image Analysis and Processing
A Comparative Evaluation of Length Estimators of Digital Curves
IEEE Transactions on Pattern Analysis and Machine Intelligence
IEEE Transactions on Pattern Analysis and Machine Intelligence
Estimation of Average Cell Shape from Digital Images of Cellular Surfaces
CRV '04 Proceedings of the 1st Canadian Conference on Computer and Robot Vision
A Sparse Texture Representation Using Local Affine Regions
IEEE Transactions on Pattern Analysis and Machine Intelligence
Three-Dimensional Face Recognition Using Shapes of Facial Curves
IEEE Transactions on Pattern Analysis and Machine Intelligence
Pores and Ridges: High-Resolution Fingerprint Matching Using Level 3 Features
IEEE Transactions on Pattern Analysis and Machine Intelligence
Notes on shape orientation where the standard method does not work
Pattern Recognition
On Shape of Plane Elastic Curves
International Journal of Computer Vision
Physiology-Based Face Recognition in the Thermal Infrared Spectrum
IEEE Transactions on Pattern Analysis and Machine Intelligence
Groups of Adjacent Contour Segments for Object Detection
IEEE Transactions on Pattern Analysis and Machine Intelligence
Boundary based shape orientation
Pattern Recognition
Multiscale Categorical Object Recognition Using Contour Fragments
IEEE Transactions on Pattern Analysis and Machine Intelligence
A Unified Curvature Definition for Regular, Polygonal, and Digital Planar Curves
International Journal of Computer Vision
An Alternative Approach to Computing Shape Orientation with an Application to Compound Shapes
International Journal of Computer Vision
High-Precision Boundary Length Estimation by Utilizing Gray-Level Information
IEEE Transactions on Pattern Analysis and Machine Intelligence
A Statistical Approach to Material Classification Using Image Patch Exemplars
IEEE Transactions on Pattern Analysis and Machine Intelligence
A unifying approach to moment-based shape orientation and symmetry classification
IEEE Transactions on Image Processing
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We define a method for computing the orientation of compound shapes based on boundary information. The orientation of a given compound shape S is taken as the direction @a that maximises the integral of the squared length of projections, of all the straight line segments whose end points belong to particular boundaries of components of S to a line that has the slope @a. Just as the concept of orientation can be extended from single component shapes to multiple components, elongation can also be applied to multiple components, and we will see that it effectively produces a measure of anisotropy since it is maximised when all components are aligned in the same direction. The presented method enables a closed formula for an easy computation of both orientation and anisotropy.