580results about How to "Accurate reconstruction" patented technology

A system 100 for tracking the movement of multiple objects within a predefined area using a continuation of overhead X-Y tracking cameras 24 with attached frequency selective filter 24f. Also employed are perspective Z filming cameras sets 30. Objects to be tracked, such as player 17, have been marked to include some form of frequency selective reflective material such as an ink. Typical markers include patches 7r and 7l, sticker 9 and tape 4a as well as additional body joint markers 17af through 17l. System 100 radiates selected energy 23a throughout the predefined area of tracking that is specifically chosen to reflect off said reflective materials used to mark for instance player 17. The reflected energy is then received by tracking cameras 24 while all other ambient light is blocked by filter 24f. Local Computer System 60 continuously captures images from said tracking cameras 24 which include only the minimum information created by said reflected energy. System 60 efficiently locates said markings on said multiple objects and uses this location information to determine for each marking its angle of rotation, angle of azimuth and distance from a designated origin 17o local to player 17. Local origin 17o is then expressed as a three-dimensional coordinate with respect to the origin of the playing venue 2a. The continuous stream of tracked three-dimensional coordinates, defining the body joints on players such as 17, is then transmitted to a remote computer where it can be used to drive a graphic re-animation of the object movement. Along with this re-animation, additional performance measurements may be derived from the continuous stream and automatically made available in real-time.

An imaging system incorporating adaptive compression which includes determining linear predictive differential residuals from an imager array pixel row. The differential residuals are classified into categories, each category having a range of differential residuals associated with it. The categories are analyzed to produce an ordered list having categories with most to least frequent residuals falling within a respective residual range associated with a respective category. The ordered list is then used to select a variable length encoding table with a matching ordered list. Variable length encoded category and range position offset data is output to a serializer unit, where the range position offset refers to a position in a range associated with a particular category.

A novel bandwidth extension technique allows information to be encoded and decoded using a fractal self similarity model or an accurate spectral replacement model, or both. Also a multi-band temporal amplitude coding technique, useful as an enhancement to any coding/decoding technique, helps with accurate reconstruction of the temporal envelope and employs a utility filterbank. A perceptual coder using a comodulation masking release model, operating typically with more conventional perceptual coders, makes the perceptual model more accurate and hence increases the efficiency of the overall perceptual coder.

A system for three-dimensional (3-D) facial animation, including a base 3-D surface model representing a human face, and a set of displacement fields representing surface motion patterns associated with muscle movements. Each displacement field is a displacement vector varying over vertices of the base surface model and an intensity variable. Both the base surface model and displacement fields are acquired from a live subject by 3-D acquisition. The data are acquired using a surface acquisition system, capable of measuring the coordinates of a set of points on the subject's face and reconstructing the facial surface as a surface model. The base surface model is acquired by reconstructing the surface of the subject's face in the neutral pose. Each displacement field is acquired by reconstructing the surface of the subject's face in a series of poses of a muscle movement at increasing intensities. This results in a sequence of surface models exhibiting the changing shape of the face over the progress of the muscle movement. The displacement field is derived by calculating displacements at each selected intensity value and then interpolating over the known displacements.

A method for medical imaging is provided, wherein a current position of a medical instrument inserted into a moving examination area of a patient is displayed. The medical instrument is displayed within a reconstructed three-dimensional image of the moving examination area based on position data of the instrument registered with a coordinate system of the reconstructed three-dimensional image. The reconstructed three-dimensional image is a simulation of the moving examination area using a pre-insertion 3D image of the examination area correlated with pre-insertion ECG data of the patient. A display of the reconstructed three-dimensional image is triggered by current ECG data of the patient.

Disclosed are a frame error concealment method and apparatus and an audio decoding method and apparatus. The frame error concealment (FEC) method includes: selecting an FEC mode based on at least one of a state of at least one frame and a phase matching flag, with regard to a time domain signal generated after time-frequency inverse transform processing; and performing corresponding time domain error concealment processing on the current frame based on the selected FEC mode, wherein the current frame is an error frame or the current frame is a normal frame when the previous frame is an error frame.

One method embodiment of the present invention is a process for using deterministic methods to calculate dose distributions resulting from radiotherapy treatments, diagnostic imaging, or industrial sterilization, and for calculating scatter corrections used for image reconstruction. In one embodiment of the present invention, the method provides a means for constructing a deterministic computational grid from an acquired 3-D image representation, transport of an external radiation source through field shaping devices and into the computational grid, calculation of the radiation scatter and/or delivered dose in the computational grid, and subsequent transport of the scattered radiation to detectors external to the computational grid. In another embodiment of the present invention, the method includes a process, by solving the adjoint form of the transport equation, which can enable patient dose responses to be calculated independently of treatment parameters and prior to treatment planning, enabling patient dose fields to be accurately reconstructed during treatment planning and verification.

A real-time data acquisition and storage network for real-time acquisition and storage of analog and digital data from one or multiple network-connected data sources to one or multiple network-connected storage devices during a data recording session, and precise reconstruction of the acquired data from one or multiple of the network-connected storage devices during a playback session. The data source are connected to the network through one or multiple real-time data acquisition network (“R-T DAN”) modules which form one or multiple network-connected data acquisition nodes on the network. Each storage device forms a network-connected storage node on the network so that data acquired at any data acquisition node may be applied to the network and stored at any storage node during a data recording session. The stored data may be retrieved from the storage nodes through the network and routed to the data acquisition nodes for reconstruction of the data during a playback session.

A watermark-based age verification system is provided in one implementation. The verification system may also verify a biometric template against a biometric sample. Shelf-life identification documents are provided in another implementation. Another aspect of the present invention analyzes image data to identify a face region or silhouette associated with a human subject depicted in the image data. The image data is adjusted, e.g., to center or align a face region within an image frame. A digital watermark is embedded after realignment. Another aspect authenticates or handles digital images that are captured at a first location and transferred to a second location via watermarking. In another implementation, first machine-readable code on an identification document layer is cross-correlated with second machine-readable code on the identification document. The first and second machine-readable codes are preferably sensed though different means, but can be cross-correlated to determine authenticity of an identification document.

An approach is provided estimating non-linear characteristics of an amplifier (such as a Travelling Wave Tube Amplifier) used to amplify a composite signal in a radio communication system. The composite signal, which includes a plurality of inbound signals overlay on an outbound signal, is sampled. The outbound signal is utilized as a training signal. Coarse estimates of the response of the amplifier is generated based on the samples of the composite signal and the training signal. Further, the interference associated with the inbound signals are removed from the estimation of the response of the amplifier by curve-fitting and estimating interference characteristics of the composite signal. An estimated response of the amplifier is thus output, and can be utilized to provide accurate non-linearity compensation and cancellation.

The invention discloses a multi-modality autofluorescence molecular tomographic imaging instrument, comprising a signal gathering module, a signal preprocessing module, a system control module, and a signal post-processing module. The method of the invention comprises determining the feasible region of light source through X-ray imaging and autofluorescence tomographic imaging based on multi-stage adaptive finite element combined with digital mouse, reconstruction target area optical characteristic parameter, and modality fusion, and adaptive optimized factorization for partial texture according to the posterior error estimation to obtain the fluorescence light source in reconstruction target area. The morbidity problem of autofluorescence molecular tomographic image can be efficiently solved, and the precise reconstruction of the autofluorescence light source can be carried out in the complicated reconstruction target area by the multi-modality fusion imaging mode of the autofluorescence molecular tomographic imaging. The precise reconstruction of the autofluorescence light source can be finished by the liquid nitrogen cooling CCD probe, multi-angle fluorescence probe technology, and multi-modality fusion technology, and the autofluorescence molecular tomographic imaging algorithm based on multi-stage adaptive finite element with the non-uniformity characteristics of the reconstruction target area.

The invention relates to a sliding core and an intervertebral disc prosthesis for the compensation of angles between vertebral endplates, for the preservation or improvement of function of a motion segment of the lumbar or cervical spine. A sliding core, according to the invention, for functional two- or three part intervertebral disc prostheses, is intended to ascertain a compensation, for the correction or preservation of angles within an intervertebral space. By this, it is possible not to have to remove implanted prosthetic plates from their assembly to vertebral bodies. According to the invention, functional two- and three part intervertebral disc prostheses with an asymmetrically angled sliding core are also planned. Concomitantly, upper and lower sliding partner of a three component prosthesis as well as the two sliding partners of a two part prosthesis function as endplates, which have means for a firm assembly to an upper and lower vertebral body.

The invention discloses a super-resolution imaging system based on a compression coding aperture and an imaging method thereof, mainly solving a problem of expensive imaging cost in the prior art. The method comprises the following steps: designing a convolution template, and making a coding aperture according to coherence of a light source; placing the prepared coding aperture at a position of aperture diaphragm in an optical system and pressing a shutter for imaging, and obtaining a low resolution coding image; transmitting the coding image to a master control computer, decoding super-resolution to reconstruct a high-resolution image, and using a denoising algorithm to remove an artificial trace in the high-resolution image. The system and the method are characterized in that: restriction of a Nyquist criterion is broken through, low frequency sampling is carried out on a scene, the high-resolution image is obtained through super-resolution reconstruction, data waste caused by first sampling and second compression of a traditional imaging system is overcome, in sampling, data volume is compressed, imaging cost, compression cost and transmission cost are reduced, and the system and the method can be used for infrared imaging and remote sensing imaging technology.

An imaging system, methodology, and various applications are provided to facilitate optical imaging performance. The system contains a sensor having one or more receptors and an image transfer medium to scale the sensor and receptors in accordance with resolvable characteristics of the medium, and as defined with certain ratios. Also provided are digital images that contain a plurality of image pixels, each image pixel containing information from about one sensor pixel, each sensor pixel containing substantially all information from about one associated diffraction limited spot in an object plane. Methods of making digital images are provided.