Scale-Based Description and Recognition of Planar Curves and Two-Dimensional Shapes
IEEE Transactions on Pattern Analysis and Machine Intelligence
Model Construction and Shape Recognition from Occluding Contours
IEEE Transactions on Pattern Analysis and Machine Intelligence
Robust Contour Decomposition Using a Constant Curvature Criterion
IEEE Transactions on Pattern Analysis and Machine Intelligence
A Theory of Multiscale, Curvature-Based Shape Representation for Planar Curves
IEEE Transactions on Pattern Analysis and Machine Intelligence
CVGIP: Image Understanding
Parts of Visual Form: Computational Aspects
IEEE Transactions on Pattern Analysis and Machine Intelligence
Joint Induction of Shape Features and Tree Classifiers
IEEE Transactions on Pattern Analysis and Machine Intelligence
Shape representation and recognition from multiscale curvature
Computer Vision and Image Understanding
The Earth Mover's Distance as a Metric for Image Retrieval
International Journal of Computer Vision
Empirical evaluation of dissimilarity measures for color and texture
Computer Vision and Image Understanding - Special issue on empirical evaluation of computer vision algorithms
Silhouette-Based Isolated Object Recognition through Curvature Scale Space
IEEE Transactions on Pattern Analysis and Machine Intelligence
Shape Matching and Object Recognition Using Shape Contexts
IEEE Transactions on Pattern Analysis and Machine Intelligence
IEEE Transactions on Pattern Analysis and Machine Intelligence
Efficient Pattern Recognition Using a New Transformation Distance
Advances in Neural Information Processing Systems 5, [NIPS Conference]
Unsupervised Learning of Human Motion
IEEE Transactions on Pattern Analysis and Machine Intelligence
Interpolation processes in the visual perception of objects
Neural Networks - 2003 Special issue: Advances in neural networks research IJCNN'03
Object-level structured contour map extraction
Computer Vision and Image Understanding
Object Detection Using the Statistics of Parts
International Journal of Computer Vision
Curves vs. skeletons in object recognition
Signal Processing - Special section on content-based image and video retrieval
Estimating the Support of a High-Dimensional Distribution
Neural Computation
Development of Sensitivity to Texture and Contour Information in the Human Infant
Journal of Cognitive Neuroscience
Visual Categorization and Object Representation in Monkeys and Humans
Journal of Cognitive Neuroscience
Intermediate-level visual representations and the construction of surface perception
Journal of Cognitive Neuroscience
Contour grouping with prior models
IEEE Transactions on Pattern Analysis and Machine Intelligence
Distance sets for shape filters and shape recognition
IEEE Transactions on Image Processing
An introduction to kernel-based learning algorithms
IEEE Transactions on Neural Networks
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Cells in extrastriate visual cortex have been reported to be selective for various configurations of local contour shape [Pasupathy, A., & Connor, C. E. (2001). Shape representation in area V4: Position-specific tuning for boundary conformation. The Journal of Neurophysiology, 86 (5), 2505-2519; Hegde, J., & Van Essen, D. C. (2003). Strategies of shape representation in macaque visual area V2. Visual Neuroscience, 20 (3), 313-328]. Specifically, Pasupathy and Connor found that in area V4 most cells are strongly responsive to a particular local contour conformation located at a specific position on the object's boundary. We used a population of ''V4-like cells''-units sensitive to multiple shape features modeled after V4 cell behavior-to generate representations of different shapes. Standard classification algorithms (earth mover's distance, support vector machines) applied to this population representation demonstrate high recognition accuracies classifying handwritten digits in the MNIST database and objects in the MPEG-7 Shape Silhouette database. We compare the performance of the V4-like unit representation to the ''shape context'' representation of Belongie et al. [Belongie, S., Malik, J., & Puzicha, J. (2002). Shape matching and object recognition using shape contexts. IEEE Transactions on Pattern Analysis and Machine Intelligence, 24 (24), 509-522]. Results show roughly comparable recognition accuracies using the two representations when tested on portions of the MNIST database. We analyze the relative contributions of various V4-like feature sensitivities to recognition accuracy and robustness to noise - feature sensitivities include curvature magnitude, direction of curvature, global orientation of the contour segment, distance of the contour segment from object center, and modulatory effect of adjacent contour regions. Among these, local curvature appears to be the most informative variable for shape recognition. Our results support the hypothesis that V4 cells function as robust shape descriptors in the early stages of object recognition.