This paper presents a technique for planar image mosiacing where a series of ordered and partial overlapping images are combined into one large image in a one-by-one sequence. Hierarchical chamfer matching algorithm (HCMA) is used in image alignment to find the best matching position from edge feature in multi-resolution pyramid. Unlike many mosaicing software packages, this technique needs no ...

Matching is a central problem in image analysis and pattern recognition. In order to develop a matching algorithm that provides the optimal fit (i.e. “center-on” fit attempting to position the model points at equal spacing from the target image) between the model and distorted target images, a hierarchical modified Chamfer matching system with the simulated annealing is proposed in this paper. ...

This paper introduces a novel approach to facial expression recognition in video sequences. Low cost contour features are introduced to effectively describe the salient features of the face. Temporalboost is used to build classifiers which allow temporal information to be utilized for more robust recognition. Weak classifiers are formed by assembling edge fragments with chamfer scores. Detectio...

We present a method for nonrigid registration of 2-D geometric shapes. Our contribution is twofold. First, we extend the classic chamfer-matching energy to a variational functional. Secondly, we introduce a meshless deformation model that can adapt computation to the shape boundary. In our method, 2-D shapes are implicitly represented by a distance transform, and the registration error is defin...

This study describes tongue movements of normal preschool children dUring eatmg, and is the first jJhase 111 a long-term proJfct to develop a standardned eatmg assessment for children. 11 is hoped eventually to fill the need for an objectIVe measurement tooL m pecllOtrl.C occupational therapy practice. The movements lOne monitored In 40 children; 20 were 4 years ± 1 month, and 20 were 5 years ±...

Previous work has shown that languages differ in their articulatory setting, the postural configuration that the vocal tract articulators tend to adopt when they are not engaged in any active speech gesture, and that this posture might be specified as part of the phonological knowledge speakers have of the language. This study tests whether the articulatory setting of a language can be acquired...

This paper describes a system for the acquisition, real-time synchronization and analysis of acoustic, electropalatographic (EPG) and ultrasonographic (UTI) data. Simultaneous data on linguo-palatal contact and tongue sagittal profiles are captured for rhotic consonants produced by a native speaker of Italian. Three anterior variants of /r/ ([ɾ], [ɹ̝] and [ɹ]) are shown to be realized with an ap...