62 results about "Optical correlation" patented technology

PCT No. PCT/CA94/00347 Sec. 371 Date Apr. 26, 1996 Sec. 102(e) Date Apr. 26, 1996 PCT Filed Jun. 17, 1994 PCT Pub. No. WO95/01045 PCT Pub. Date Jan. 5, 1995An electronic apparatus for converting a visible image of an object into a digital representation of this visible image is described. The apparatus comprises a cartridge having a first portion through which light emitted from a visible image of an object enters into the cartridge, which comprises an array of focusing elements, each of which having a field of vision intersecting a given area of the visible image. Adjacent ones of these focusing elements have fields of vision intersecting common portions of the visible image, whereby substantially the entirety of the visible image is covered by combined fields of vision of focusing elements. The cartridge further compised an array of optical sensors arrays, each wich is optically associated with a respective one of the focusing elements. These optical sensors arrays produce groups of analog pixel signals representing partial images associated with corresponding areas of the visible image. The apparatus further comprises a controller interface and a computer controller for converting groups of digital pixel signals into composite digital pixel signals associated with the respective points of the visible image, thereby forming a composite digital representation of the visible image.

A method of conducting an assay on a plurality of samples is provided. The method includes the steps of performing an assay at each sample site in a sample array having greater than 100 sample sites simultaneously illuminating each sample site using one or more LEDs, and simultaneously imaging each of the sample sites to produce imaging data pertinent to the optical effect of each site. Each assay provides an optical effect.

The invention provides an illegal domain name recognition method and an illegal domain name recognition device. The illegal domain name recognition method comprises the steps of: obtaining domain name access behavior information and generating a co-occurrence matrix according to the domain name access behavior information, wherein elements in the co-occurrence matrix are used for indicating times that users corresponding to the line of the elements access to domain names corresponding to the row of the elements; conducting clustering analysis to the co-occurrence matrix according to a clustering algorithm and dividing the domain names corresponding to each row in the co-occurrence matrix into a plurality of domain name subsets; and determining the legality of the domain names in each domain name subset according to an illegal domain name list. The illegal domain name recognition device comprises a co-occurrence matrix generation module, a domain name subset dividing module and a legality determining module. The illegal domain name recognition method and the illegal domain name recognition device can analyze optical correlation among the domain names aiming at the particularity of the illegal domain names to differentiate the illegal domain names from the legal domain names, and therefore the recognition efficiency of illegal websites is improved.

Systems and methods of angle-resolved low coherence interferometry based optical correlation are disclosed. According to an aspect, a method includes directing a sample beam towards a sample for producing a scattered sample beam from the sample. The method also includes receiving the scattered sample beam at a multitude of scattering angles in at least two directions. Further, the method includes cross-correlating the scattered sample beam with a reference beam to produce a two-dimensional angle and depth resolved profile of the sample scattered beam. The method also includes processing the two-dimensional angle and depth scattered profile to obtain correlated information about scattering structures in the sample.

The present invention relates to a discrete optical correlation system. One embodiment of the present invention includes a portable electrical illumination system and an optically opaque hollow module, configured to releasably couple to the portable electrical illumination system in a manner such that when the portable electrical illumination system is activated, the system produces a discrete correlated or focused illumination output. The portable electrical illumination system further includes a light emitting diode, a power source, a switch, and a coupling mechanism. The optically opaque hollow module further includes at least two openings, a hollow internal region, an optically opaque outer surface, and a coupling mechanism disposed on at least one of the at least two openings.

A method of determining saturate, aromatic, resin, and asphaltene (SARA) fractions of a hydrocarbon fluid sample, including: i) microfluidic mixing that forms a mixture including the hydrocarbon fluid sample and a solvent fluid that dissolves asphaltenes; ii) performing optical spectroscopy on the hydrocarbon fluid sample-solvent fluid mixture resulting from i); iii) microfluidic mixing that forms a mixture including the hydrocarbon fluid sample and a titrant fluid that precipitates asphaltenes; iv) microfluidically precipitating asphaltenes from the hydrocarbon fluid sample titrant fluid mixture resulting from iii); v) performing a microfluidic filtering operation that removes precipitated asphaltenes from the mixture resulting from iv) while outputting permeate; vi) performing optical spectroscopy on the permeate resulting from v); vii) determining an asphaltene fraction percentage of the hydrocarbon fluid sample based on the optical spectroscopy performed in ii) and vi); viii) sequentially separating saturate-, aromatic-, and resin-containing portions from the permeate from v); ix) for each separating of viii), measuring an optical property of the respective saturate-, aromatic-, and resin-containing portions over time; and x) determining fraction percentages of saturates, aromatics, and resins in the hydrocarbon fluid sample based on the measured optical properties of ix) and respective mass-to-optical correlation data.

The invention relates to a low storage monitoring method based on optical correlation. The low storage monitoring method is mainly technically characterized by comprising the following steps that: a video acquisition module extracts a sample image according to a certain frequency specific to video stream data; an image processing module performs image correlation computation on the sample image according to an SSIM (Structural Similarity Index Measurement System) method; the image processing module judges whether image correlation is greater than a preset threshold or not, and performs video storage if the image correlation is not greater than the preset threshold; and if the image correlation is greater than the preset threshold, the image processing module performs image storage. According to the low storage monitoring method, image correlation comparison is performed on an acquired video image, and the occurrence of a perimeter intrusion event is judged intelligently. Moreover, video data is saved selectively, so that the aim of saving internal memory can be fulfilled by not storing non-significant data when the perimeter intrusion event does not occur in an environment, and the problems of high construction cost, large occupied storage space, high energy consumption and the like in an existing video monitoring system are solved. The low storage monitoring method can be widely applied to the video monitoring occasions of security video monitoring, night security video monitoring of parking lots and dormitory areas, and the like during logistics system transportation.

The invention relates to a distributed optical fiber sensing system, in particular to a Brillouin optical correlation-domain analyzer device and method based on a supercontinuum. The device comprises a quasi-continuous wave Raman fiber laser, a first optical isolator, a real wave fiber, a first tunable optical filter, a second optical isolator, a 1*2 fiber coupler, a first polarization controller, a high-speed electro-optical modulator, a microwave signal source, a variable optical delay line, a first optical amplifier, an optical scrambler, a third optical isolator, a sensing fiber, a second polarization controller, a second optical amplifier, an optical circulator, a second tunable optical filter and an optical power detector. Compared with a BOCDA (Brillouin Optical Correlation-Domain Analysis) system, the Brillouin optical correlation-domain analyzer device and method based on a supercontinuum have the higher spatial resolution and a longer distributed sensing distance; it is worth stating that the supercontinuum has a wider spectrum, meaning that the spatial resolution can reach sub-millimeter level, and the output power of the quasi-continuous Raman fiber laser is high so as to provide enough energy for long-distance sensing.

The invention relates to a photoelectricity mixing correlator based on a position sensitive device (PSD) position detector. For the first time, the PSD position detector is introduced into a matched filtering correlator, correlation peak information is collected by a PSD, and target position information is extracted according to the correlation peak information of a target image and a template image after photology correlation conversion. Photoelectric conversion efficiency is greatly improved, and simultaneously organic combination of flexibility of electronics and high speed of optics is achieved. A matched filter is conducted in advance by an electronics method, the target image and the template image are input into a spatial light modulator, optics Fourier transformation is conducted by a Fourier transformation lens, and related computing results are collected by the PSD position detector. The photoelectricity mixing correlator based on the PSD position detector can be applied to high-speed image stabilizing of video, high-speed identification and tracking of a target and the like.

A motion-sensing device is used to track motion of an object. The motion-sensing device includes an optical correlator, a motor system and a controller. The optical correlator has an imager. The optical correlator provides a feedback signal that indicates motion of the object in at least one dimension based on detected movement of an image of the object from a first location within the imager to a second location within the imager. The motor system can move the imager. The controller receives the feedback signal from the optical correlator and uses the feedback signal to calculate motion of the object and to control the motor system to move the imager so that the image of the object is returned to the first location within the imager.

The invention belongs to the field of image processing, in particular to a restoration method for a real-time motion blurred image of photoelectric hybrid joint transform correlation. The method comprises the following steps of: performing optical correlation computation on an image sequence acquired by using a high-speed CCD (Charge Coupled Device) according to a quick real-time optical correlation principle, so that correlation detection of an image motion displacement vector is realized, wherein a processing speed is increased by hundreds of times than that of digital-electronic processing; and establishing an accurate model of a point spread function (PSF), and determining an image restoration algorithm through the model, so that high-resolution real-time motion image restoration is performed on a blurred image obtained by using a main imaging CCD system. The method has high displacement vector detection accuracy and accurate PSF modeling, so that image restoration accuracy is high; and meanwhile, the method has the advantages of high speed, large volume and parallel processing of optical image processing and flexibility, accuracy and programmability of a digital processing technology, so that image instantaneity is high.

The invention provides an optical correlation type oil smoke detection device with sheath gas protection. The device consists of a fixing flange plate, a light source generating cavity, a light sourcesignal cavity and a connecting beam, wherein the fixing flange plate, the light source signal cavity and the light source generating cavity are hollow cylinders which are coaxially arranged from leftto right at a circle center in sequence; the fixing flange plate and the light source signal cavity are connected together; a gap is arranged between the light source signal cavity and the light source generating cavity; and the connecting beam is arranged between the light source generating cavity and the light source signal cavity. A sheath air supplementing system is added to the whole device,so that the inaccuracy of data caused by oil smock adhering to a detection lens is avoided, the service life of the equipment is greatly prolonged, and the maintenance frequency of operation and maintenance personnel on the equipment is reduced.

Examples of systems and methods for integrated photonic broadband microwave receivers and transceivers are disclosed based on integrated coherent dual optical frequency combs. In some cases, when the system is configured as a receiver, the microwave spectrum of the input signal can be sliced into several spectral segments for low-bandwidth detection and analysis. In some cases, when the system is configured as a transmitter, multiple radio frequency (RF) carriers can be generated, which can be coherently added or encoded independently for transmission of individual microwave bands. In some systems, the optics-related functionalities can be achieved via integrated optic technology, for example, based on silicon photonics, providing tremendous possibilities for mass-production with significantly reduced system footprint.

The invention discloses an in-car monitoring system. The system comprises a first group of optical correlation sensors, a second group of optical correlation sensors and a processor; a light beam projector and a light beam receiver of the same group of light correlation sensors are respectively arranged on the left side wall and the right side wall of a car; when no light blocking object exists ona light beam path between the light beam projector and the light beam receiver of one group of light correlation sensors, a non-blocking signal is output to the processor, and when the light blockingobject exists, a light blocking signal is output to the processor; the distance between a light beam projector and a light beam receiver of the first group of light correlation sensors and the car ground is a first height; the distance between a light beam projector and a light beam receiver of the second group of light correlation sensors and the car ground is a second height, and the second height is greater than the first height; and when the first group of optical correlation sensors output the optical blocking signal and the second group of optical correlation sensors output no blockingsignal, the processor outputs a falling signal in the car.

Embodiments of the invention provide a multispectral fluorescence segmentation method and apparatus. The method comprises the steps of obtaining a multispectral fluorescence segmentation neural network, wherein the multispectral fluorescence segmentation network is obtained by training a three-dimensional convolutional neural network; taking multiple groups of surface excitation fluorescence images of different wavelengths obtained under a laser excitation condition as input data required for training, and taking multiple groups of surface fluorescence images of different wavelengths obtainedunder no laser excitation condition as a fluorescence spot distribution result of training; and obtaining to-be-processed multispectral excitation fluorescence images, and inputting the to-be-processed multispectral excitation fluorescence images to the multispectral fluorescence segmentation neural network, thereby obtaining a segmentation result of excitation fluorescence spots. According to thescheme, the situation that the fluorescence images of the different fluorescence wavelengths have optical correlation, so that an effective fluorescence region can be accurately divided and the accuracy of the segmentation result of the excitation fluorescence spots can be improved.

Optical correlators are discussed, suitable for in-vehicle distance measurement. The correlators use modulation sequences based on maximal length sequences. A number of different modulation sequences are obtained by generator (32) from a single maximal length sequence, either by adding a variable number of cycles to the end of the maximal length sequence or by starting the maximal length sequence at different points in the sequence.