148 results about "Spatial localization" patented technology

The invention relates to a system and method for recognition, classification and spatial localization of bounded 3D-objects. In particular it relates to a computerized method for recognition, classification and localization of objects. The method comprises generation of a training database based on a large number of training views recorded by a camera or constructed using a CAD representation of an object. Characteristic curves are derived from the training views, and primitives of the curves are detected. Intrinsic and extrinsic descriptors of features are stored in the database together with data about the object class and pose of the view. Finally the recognition takes place in two stages: First the intrinsic descriptors of the recognition view are compared with those of the database. Second, among the best matching features it is explored which features agree mutually in the sense that they suggest the same object class at the same pose.

Instead of normalizing time reference of independent spatially-located clocks using a reference tag transmission from known location, the present invention uses an interarrival time interval between a pulse pair of UWB pulses as a timing metric. Thus, a method of synchronizing spatially-located clocks or normalizing time indications thereof comprises transmitting a UWB pulse pair, determining at first and second monitoring stations a respective count value indicative of a locally measured time interval between received pulse pairs, determining a ratio between clock counts of first and second monitoring stations, and utilizing the ratio to determine clock skew, e.g., a timing correction to be applied to respective local clocks of the monitoring stations. A corresponding system comprises a reference tag transmitter that transmits a pulse pair of UWB pulses to define a time reference interval, a first independent receiver that receives, the pulse pair to generate a first count value indicative an interarrival interval between the pulse pair, a second independent receiver that receives the pulse pair to similarly generate a second count value, and a processor hub responsive to the count values to determine a ratio corresponding to the ratio of respective clock frequencies of the first and second receiver clocks. Once the correction is applied, time-of-arrival information from object tag transmissions may be used to determine object location with sub-foot position accuracies.

A multichannel source activity detection system, e.g., a voice activity detection (VAD) system, and method that exploits spatial localization of a target audio source is provided. The method includes the steps of receiving a mixed sound signal by at least two microphones (102, 104); Fast Fourier transforming each received mixed sound signal into the frequency domain (110); filtering the transformed signals to output a signal corresponding to a spatial signature of a source (120); summing an absolute value squared of the filtered signal over a predetermined range of frequencies (122); and comparing the sum to a threshold to determine if a voice is present (124). Additionally, the filtering step includes multiplying the transformed signals by an inverse of a noise spectral power matrix (132), a vector of channel transfer function ratios (130), and a source signal spectral power (128).

Nitrogen vacancies in bulk diamonds and nanodiamonds can be used to sense temperature, pressure, electromagnetic fields, and pH. Unfortunately, conventional sensing techniques use gated detection and confocal imaging, limiting the measurement sensitivity and precluding wide-field imaging. Conversely, the present sensing techniques do not require gated detection or confocal imaging and can therefore be used to image temperature, pressure, electromagnetic fields, and pH over wide fields of view. In some cases, wide-field imaging supports spatial localization of the NVs to precisions at or below the diffraction limit. Moreover, the measurement range can extend over extremely wide dynamic range at very high sensitivity.

An optical transport system configured to transmit a set of two or more optical variants per bit-word, with the optical variants in the set being different from one another in one or more of the time of transmission, spatial localization, polarization of light, carrier wavelength, and subcarrier frequency. Differences between the optical variants may also be due to different respective constellation mapping. The optical variants of each set are detected and processed at the receiver in a manner that enables coherent summation of the corresponding electrical signals prior to constellation de-mapping. The coherent summation tends to average out the deleterious effects of linear and nonlinear noise / distortions imparted on the individual optical variants in the optical transport link because said noise / distortions are incoherent in nature. A BER reduction enabled by the use of optical variants may be implemented in addition to or instead of that provided by FEC coding.

An optical transport system configured to transmit a set of two or more optical variants per bit-word, with the optical variants in the set being different from one another in one or more of the time of transmission, spatial localization, polarization of light, carrier wavelength, and subcarrier frequency. Differences between the optical variants may also be due to different respective constellation mapping. The optical variants of each set are detected and processed at the receiver in a manner that enables coherent summation of the corresponding electrical signals prior to constellation de-mapping. The coherent summation tends to average out the deleterious effects of linear and nonlinear noise / distortions imparted on the individual optical variants in the optical transport link because said noise / distortions are incoherent in nature. A BER reduction enabled by the use of optical variants may be implemented in addition to or instead of that provided by FEC coding.

The present invention is directed to novel tissue protective peptides. The tissue protective peptides of the invention may bind to a tissue protective receptor complex. In particular, the present invention is drawn to tissue protective peptides derived from or sharing consensus sequences with portions of cytokine receptor ligands, including Erythropoietin (EPO), that are not involved in the binding of the ligand to the receptor complex, e.g., to the EPO receptor homodimer. Accordingly, the tissue protective peptides of the invention are derived from the amino acid sequences of regions of cytokine receptor ligands that are generally located on or within the region of the ligand protein that is opposite of the receptor complex, i.e., are generally derived from amino acid sequences of regions of the ligand protein that face away from the receptor complex while the ligand is bound to the receptor. The invention is further directed to the consensus sequences for use in engineering a synthetic tissue protective peptide. These tissue protective peptides also include fragments, chimeras, as well as peptides designed to mimic the spatial localization of key amino acid residues within the tissue protective receptor ligands, e.g., EPO. The invention further encompasses methods for treating or preventing a disease or disorder using tissue protective peptides of the current invention. The invention also encompasses methods for enhancing excitable tissue function using tissue protective peptides of the current invention.