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We theoretically demonstrate how cloaks, anticloaks, magnifiers and illusion devices can be devised for the case of static magnetic fields. For some of these devices, we make use of the concept of negative permeability materials. Because these materials can be emulated in practice by sets of currents, our results may provide the recipe for the experimental realization of novel devices for controlling...
Tattoos can provide useful information related to criminal gang activity. Law enforcement can use the information embedded in tattoos to identify and track the criminal history of a suspect. For matching processes, tattoo images are difficult to use due to problems such as deformations and weak edge structures. In this paper we describe a tattoo image retrieval and matching system based on a combination...
In this paper we describe a mobile-based hazardous material (hazmat) sign detection and recognition system. Hazmat sign detection is based on visual saliency models. We use saliency maps to denote regions that are likely to contain hazmat signs in complex scenes and then use a convex quadrilateral shape detector to find hazmat sign candidates in these regions. Experimental results show that our proposed...
In this paper we describe three methods for recognition, segmentation and retrieval of gang graffiti images. The first method is color recognition based on touchscreen tracing, the second method is color image segmentation based on Gaussian thresholding and the third method is content based image retrieval. Our experimental results show an image retrieval accuracy of 92.8% for gang graffiti scene...
In this paper we describe two methods for hazardous material (haz-mat) sign recognition. The first method is based on segment detection and grouping using geometric constraints. The second method is based on the use of a saliency map and convex quadrilateral detection. Our experimental results show a detection accuracy of 57.7% on a set of hazmat signs taken in the field under various lightning conditions,...
We have developed a system to translate and interpret printed documents (such as periodicals) using a commercially available mobile device (e.g., a mobile telephone) with an embedded camera. The system comprises an automatic layout analysis tool along with an Optical Character Recognition (OCR) engine and a translation engine. The translation engine combines Rule-Based Machine Translation (RBMT) software,...
We propose a system for helping individuals who follow a medical diet maintain this diet while visiting countries where a foreign language is spoken. Our focus is on diets where certain foods must either be restricted (e.g., metabolic diseases), avoided (e.g., food intolerance or allergies), or preferably consumed for medical reasons. However, our framework can be used to manage other diets (e.g.,...
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