Abstract: An intra-oral imaging system includes an optical conduit, a light source generating light rays, at least a portion of which are transmitted through the optical conduit to illuminate a dental surface, a device for converting the light rays into radiation illumination with spatially varying wavelengths prior to illuminating the dental surface, a reflector that directs the light rays from the light source to a selected point; and an imager for receiving the light rays when the light rays are reflected from the dental surface.

Abstract: An improved diffuse optical tomography system for in vivo non-contact imaging includes an illumination source for illuminating a specimen, a spectrum source for projecting a spectrum onto the specimen, at least one sensor configured to capture the response of the specimen to the illumination and to the projection of said spectrum.

Abstract: A three-dimensional imaging method and system illuminates an object to be imaged with a light pattern that is formed from two or more light sub-patterns. The sub-patterns can each encompass the visible light spectrum or can be spatially varying intensity sub-patterns that each correspond to a red, green, or blue component. The light pattern is generated by a slotted planar member or an optical filter.

Abstract: An intra-oral imaging system that produces images of a dental surface includes a probe that contains an optical conduit for transmitting light with spatially varying wavelengths for illuminating a dental surface and a camera for receiving light rays reflected from the dental surface. The invention also includes a concave reflector used in conjunction with the probe to increase the field-of-view of the camera, allowing optical coverage of the entire surface of a tooth in a single image.

Abstract: A method of automatically recognizing a human face includes developing a three-dimensional model of a face; and generating a number of two-dimensional images based on the three-dimensional model. The generated two-dimensional images are then enrolled in a database and searched against an input image to identifying the face of the input image.

Abstract: The primary objective of the present invention is to provide a set of simple methods and apparatus to obtain simultaneously omnidirectional stereo images without using any moving parts. The field of view of a conventional camera or a light projector can be dramatically increased by employing a reflective mirror properly placed in front of the camera or the projector. A pair of omnidirectional cameras is able to form a unique stereo imaging system that is able to obtain three dimensional images of surrounding scene with 360 degree view angle. A combination of an omnidirectional camera and an omnidirectional structured light projector can also provide a means to obtain quantitative three dimensional measurements of the objects around the camera system. The omnidirectional three dimensional imaging methods and apparatus presented herein may offer unique solutions to many practical systems that need simultaneous 360 degree viewing angle and three dimensional measurement capability.

Abstract: A three-dimensional surface profile imaging method and system uses a single spectral light illumination constraint to guarantee consistent RGB values corresponding to a given light spectrum, regardless of the surface reflectance characteristics of the object being imaged. In one embodiment, each light sheet projected onto the object contains only a single wavelength. As a result, the spectral composition of the projected light at any surface point of the object will be independent of the light intensity and the reflectance characteristics of the surface.

Abstract: A surveillance system uses an image from an omni-directional camera to identify objects or events of interest on which a higher-resolution camera can be trained.