statement of the problem: hearing impaired children have a problem in understanding and comprehending with dental treatments. visual language is the sensible answer of how to improve communication with them. purpose: to evaluate the applicability of dental sign language in hearing impaired children in relieving anxiety during stressful dental treatment by improving their means of communication....

BACKGROUND Shape of the dental root canal is highly patient specific. Automated identification methods of the medial line of dental root canals and the reproduction of their 3D shape can be beneficial for planning endodontic interventions as severely curved root canals or multi-rooted teeth may pose treatment challenges. Accurate shape information of the root canals may also be used by manufact...

This paper presents an autonomous framework for building a real 3-D human teeth database. Firstly, teeth fixed over wax are scanned by using a Cone-beam CT scanner. Then, adaptive Level-set segmentation is used to extract teeth from the wax to build the 3-D model. Finally, point-based 3-D shape registration is used to align different teeth models to minimize global differences represented in sc...

The emerging role of thumbnail images in the selection of images for display from large image databases and via network access requires that the characteristics of thumbnails be seriously studied. We introduce a measure of effective compression Ceff(p) that is a function of the probability p that thumbnail access will be followed by the display of a full-scale image. For credible values of p, w...

We present a novel color image segmentation framework, dedicated to region queries in content-based image retrieval (i.e. for queries such as “find me more images containing similar regions”). The goal is to segment the image into a few regions of interest. The novelty of our technique comes from the unification of the feature-space and the imagespace segmentation in a common framework. The met...

Sub-image search with high accuracy in natural images still remains a challenging problem. This paper proposes a new feature vector called profile for a keypoint in a bag of visual words model of an image. The profile of a keypoint captures the spatial geometry of all the other keypoints in an image with respect to itself, and is very effective in discriminating true matches from false matches....

All searches in a database are semantic in nature: a user searches something based on a certain meaning that the results will share. This model, derived from traditional databases has been extended to image databases, but insufficient attention has been paid to the characteristics of signification in images and to the technical challenges and opportunities that they generate. This paper present...

In this paper, we propose an original indexing by shape of image databases based on extended grid files. We first introduce a recently developed shape description method and tailor it to obtain suitable representation structures for image databases. Then, in order to efficiently support image retrieval, we define an indexing structure based on grid files. Since grid files were originally develo...

Query by example (or image) is commonly supported in image databases. However, it is also desirable for a contentbased image retrieval system to support multi-example queries. A multi-example query refers to a query which contains one or more example images. Although multiexample query problem can be solved by dividing it to several single-example queries, how to merge these singleexample queri...