Abstract: Camera motion is determined in a three-dimensional image capture system using a combination of two-dimensional image data and three-dimensional point cloud data available from a stereoscopic, multi-aperture, or similar camera system. More specifically, a rigid transformation of point cloud data between two three-dimensional point clouds may be more efficiently parameterized using point correspondence established between two-dimensional pixels in source images for the three-dimensional point clouds.

Abstract: A three-dimensional imaging system uses a single primary optical lens along with various configurations of apertures, refocusing facilities, and the like to obtain three offset optical channels each of which can be separately captured with an optical sensor.

Abstract: A three-dimensional imaging system uses a single primary optical lens along with three collinear apertures to obtain three offset optical channels each of which can be separately captured with an optical sensor.

Abstract: Improved correlation techniques employ data from forward (template-to-reference) and reverse (reference-to-template) correlation to identify valid correlation peaks, enforce symmetry in correlation peaks, and/or combine forward and reverse correlation data. In embodiments, these techniques eliminate or reduce rms noise in a recovered signal peak location by enforcing correlation peak symmetry. The forward and reverse correlation methods described herein may be used for validation of correlation peaks, detection of outlier data points and improved interpolation, such as for higher accuracy localization of a peak center with sub-pixel resolution.

Abstract: The systems and methods disclosed herein employ a scanning system for capturing highly detailed digital dental models. These models may be used within a dentist's office for a wide array of dental functions including quality control, restoration design, and fitting. These models may also, or instead, be transmitted to dental laboratories that may, alone or in collaboration with the originating dentist or other dental professionals, transform the digital model into a physical realization of a dental hardware item.

Abstract: Improved correlation techniques employ data from forward (template-to-reference) and reverse (reference-to-template) correlation to identify valid correlation peaks, enforce symmetry in correlation peaks, and/or combine forward and reverse correlation data. In embodiments, these techniques eliminate or reduce rms noise in a recovered signal peak location by enforcing correlation peak symmetry. The forward and reverse correlation methods described herein may be used for validation of correlation peaks, detection of outlier data points and improved interpolation, such as for higher accuracy localization of a peak center with sub-pixel resolution.

Abstract: Camera motion is determined in a three-dimensional image capture system using a combination of two-dimensional image data and three-dimensional point cloud data available from a stereoscopic, multi-aperture, or similar camera system. More specifically, a rigid transformation of point cloud data between two three-dimensional point clouds may be more efficiently parameterized using point correspondence established between two-dimensional pixels in source images for the three-dimensional point clouds.

Abstract: A three-dimensional imaging system uses a single primary optical lens along with three non-collinear apertures to obtain three offset optical channels each of which can be separately captured with an optical sensor.

Abstract: The systems and methods disclosed herein provide real time display of three-dimensional dental data acquired intraorally from a dental patient.

Abstract: A three-dimensional imaging system uses a single primary optical lens along with three non-collinear apertures to obtain three offset optical channels each of which can be separately captured with an optical sensor.

Abstract: A method of multi-resolution adaptive correlation processing of images, such as seeded fluid flow images, to efficiently increase the spatial resolution and dynamic range of detecting particle image displacements in the images. The technique takes full advantage of the multi-resolution characteristic of the discrete correlation function by starting the processing at the smallest scale and if necessary gradually building correlation planes into larger interrogation areas based on the result of inter-level correlation correction and validation. It is shown that the method can be implemented in both direct and FFT based correlation algorithms with greatly reduced computational complexity. Processing the images at the lowest scale (e.g. pixel or particle image size) allows the combination of correlation planes of various shapes both in space and in time for maximizing the correlation plane signal-to-noise ratio or for estimating statistical flow parameters.

Abstract: A three-dimensional imaging system uses a single primary optical lens along with various configurations of apertures, refocusing facilities, and the like to obtain three offset optical channels each of which can be separately captured with an optical sensor.

Abstract: Improved correlation techniques employ data from forward (template-to-reference) and reverse (reference-to-template) correlation to identify valid correlation peaks, enforce symmetry in correlation peaks, and/or combine forward and reverse correlation data. In embodiments, these techniques eliminate or reduce rms noise in a recovered signal peak location by enforcing correlation peak symmetry. The forward and reverse correlation methods described herein may be used for validation of correlation peaks, detection of outlier data points and improved interpolation, such as for higher accuracy localization of a peak center with sub-pixel resolution.

Abstract: A three-dimensional imaging system uses a single primary optical lens along with three collinear apertures to obtain three offset optical channels each of which can be separately captured with an optical sensor.

Abstract: A three-dimensional imaging system uses a single primary optical lens along with three non-collinear apertures to obtain three offset optical channels each of which can be separately captured with an optical sensor.

Abstract: The systems and methods disclosed herein provide visual feedback concerning one or more scanning parameters to a user during acquisition of a three dimensional scan.

Abstract: The systems and methods disclosed herein employ superposition of two-dimensional video and a rendered, three-dimensional image to provide visual feedback during acquisition and analysis of three-dimensional data. These systems and methods may be usefully employed in a context such as dentistry to assist in the acquisition of highly detailed and accurate digital dental models from the dentition of a dental patient.

Abstract: Camera motion is determined in a three-dimensional image capture system using a combination of two-dimensional image data and three-dimensional point cloud data available from a stereoscopic, multi-aperture, or similar camera system. More specifically, a rigid transformation of point cloud data between two three-dimensional point clouds may be more efficiently parameterized using point correspondence established between two-dimensional pixels in source images for the three-dimensional point clouds.

Abstract: Accuracy of a three-dimensional imaging system is improved through the use of model-based calibration and lookup tables to resolve distance according to, e.g., x-displacement, y-displacement, or image disparity data. In an embodiment, the lookup table(s) stores localized parameterization data used to calculate calibrated results.

Abstract: An active three-dimensional imaging system for optical apparatus includes a relay lens subsystem with an off-axis rotating aperture placed between an imaging or objective lens and an image recording device such as a CCD camera. According to another aspect, the imaging system can include an off-axis rotating aperture located between field and aperture diaphragms of an illumination subsystem. The rotating aperture allows adjustable non-equilateral spacing between images of out-of-focus object points to achieve higher spatial resolution, increased sensitivity and higher sub-pixel displacement accuracy than other systems.