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Model-based vision is firmly established as a robust approach to recognizing and locating known rigid objects in the presence of noise, clutter, and occlusion. It is more problematic to apply model-based methods to images of objects whose appearance can vary, though a number of approaches based on the use of flexible templates have been proposed. The(More)
A method for building flexible shape models is presented in which a shape is represented by a set of labelled points. The technique determines the statistics of the points over a collection of example shapes. The mean positions of the points give an average shape and a number of modes of variation are determined describing the main ways in which the example(More)
We have developed a trainable method of shape representation which can automatically capture the invariant properties of a class of shapes and provide a compact parametric description of variability. We have applied the method to a family of flexible ribbons (worms) and to heart shapes in echocardiograms. We show that in both cases a natural(More)
This experimental study was designed to validate a short-term supplemental reading intervention for at-risk first-grade children. Although substantial research on long-term supplemental reading interventions exists, less is known about short-term interventions. Thirty first-grade children were randomly assigned to intervention or control conditions.(More)
Perceived and normative dental needs were assessed for people of pre-retirement (55-64 years) and retirement age (65-74 years) in Camberwell, London, using a postal questionnaire and dental examination. Of the pre-retirement group, 77% were dentate compared with 65% in the older cohort. The younger age-group were more likely to believe teeth were more(More)
A review was made of 27 studies describing early intervention for biologically impaired infants and young children. Although every study provided some type of documentation of outcome, most studies failed to meet common criteria for scientific research, such as specification of inclusion criteria, documentation of reliability, random assignment, and/or the(More)
Models of Response to Intervention (RTI) include parameters of assessment and instruction. This study focuses on assessment with the purpose of developing a screening battery that validly and efficiently identifies first-grade children at risk for reading problems. In an RTI model, these children would be candidates for early intervention. We examined(More)