1355 results about "Multispectral image" patented technology

Methods and systems are provided for performing a biometric measurement on an individual. A purported skin site of the individual is illuminated under a plurality of distinct optical conditions during a single illumination session. Light scattered beneath a surface of the purported skin site is received separately for each of the plurality of distinct optical conditions. A multispectral image of the purported skin site is derived from the received light. A biometric function is performed with the derived multispectral image.

Methods and systems are provided for determining a liveness state of purported tissue. The purported tissue is illuminated under a plurality of distinct optical conditions during a single illumination session. Light scattered from the purported tissue is received separately for each of the plurality of distinct optical conditions. A multispectral image of the purported tissue is derived from the received light. It is verified that the derived multispectral image is consistent with living tissue.

Methods and systems are provided for performing a biometric measurement on an individual. A purported skin site of the individual disposed relative to a platen is illuminated under distinct optical conditions during a single illumination session. At least one of the optical conditions includes illuminating the purported skin site with light at an angle greater than a critical angle defined by an interface of the platen with an external environment. At least another of the distinct optical conditions includes illuminating the purported skin site with light at an angle less than the critical angle. Light scattered from the purported skin site is received separately for each of multiple optical conditions to derive a multispectral image of the purported skin site.

Methods and systems for performing a biometric measurement on an individual are disclosed. A containment film is disposed between a skin site of the individual and a platen. Light is directed through the containment film to the skin site to illuminate the skin site under multiple distinct optical conditions. Light scattered from the skin site is received for the multiple optical conditions. A multispectral image of the skin site is derived from the received light. A biometric function is performed with the derived multispectral image.

Methods and systems are provided for biometric sensing. An illumination subsystem provides light at discrete wavelengths to a skin site of an individual. A detection subsystem receives light scattered from the skin site. A computational unit is interfaced with the detection system. The computational unit has instructions for deriving a spatially distributed multispectral image from the received light at the discrete wavelengths. The computational unit also has instructions for comparing the derived multispectral image with a database of multispectral images to identify the individual.

A multispectral X-ray imaging system uses a wideband source and filtration assembly to select for M sets of spectral data. Spectral characteristics may be dynamically adjusted in synchrony with scan excursions where an X-ray source, detector array, or body may be moved relative to one another in acquiring T sets of measurement data. The system may be used in projection imaging and / or CT imaging. Processed image data, such as a CT reconstructed image, may be decomposed onto basis functions for analytical processing of multispectral image data to facilitate computer assisted diagnostics. The system may perform this diagnostic function in medical applications and / or security applications.

A method of fusing a low resolution multispectral image with a high resolution panchromatic image comprising the step of generating a new synthetic pan image using multispectral bands from the multispectral image.

An apparatus and method to determine the surface orientation of objects in a field of view is provided by utilizing an array of polarizers and a means for microscanning an image of the objects over the polarizer array. In the preferred embodiment, a sequence of three image frames is captured using a focal plane array of photodetectors. Between frames the image is displaced by a distance equal to a polarizer array element. By combining the signals recorded in the three image frames, the intensity, percent of linear polarization, and angle of the polarization plane can be determined for radiation from each point on the object. The intensity can be used to determine the temperature at a corresponding point on the object. The percent of linear polarization and angle of the polarization plane can be used to determine the surface orientation at a corresponding point on the object. Surface orientation data from different points on the object can be combined to determine the object's shape and pose. Images of the Stokes parameters can be captured and viewed at video frequency. In an alternative embodiment, multi-spectral images can be captured for objects with point source resolution. Potential applications are in robotic vision, machine vision, computer vision, remote sensing, and infrared missile seekers. Other applications are detection and recognition of objects, automatic object recognition, and surveillance. This method of sensing is potentially useful in autonomous navigation and obstacle avoidance systems in automobiles and automated manufacturing and quality control systems.

A system having an improved optical coating for use in beam combiner assemblies for an image fusion device using an organic light-emitting diode (OLED) display. The system combines multi-spectral images of a scene having superior reflection of the OLED display image while incorporating high transmission of the image fusion device while allowing low power requirements on the system.

Methods and systems are provided for biometric sensing. An illumination subsystem provides light at discrete wavelengths to a skin site of an individual. A detection subsystem receives light scattered from the skin site. A computational unit is interfaced with the detection system. The computational unit has instructions for deriving a spatially distributed multispectral image from the received light at the discrete wavelengths. The computational unit also has instructions for comparing the derived multispectral image with a database of multispectral images to identify the individual.

A method for the evaluation of target media parameters in the visible and near infrared is disclosed. The apparatus comprises a light source, an illuminator / collector, optional illumination wavelength selector, an optional light gating processor, an imager, detected wavelength selector, controller, analyzer and a display unit. The apparatus illuminates an in situ sample of the target media in the visible through near infrared spectral region using multiple wavelengths and gated light. The sample absorbs some of the light while a large portion of the light is diffusely scattered within the sample. Scattering disperses the light in all directions. A fraction of the deeply penetrating scattered light exits the sample and may be detected in an imaging fashion using wavelength selection and an optical imaging system. The method extends the dynamic range of the optical imager by extracting additional information from the detected light that is used to provide reconstructed contrast of smaller concentrations of chromophores. The light detected from tissue contains unique spectral information related to various components of the tissue. Using a reiterative calibration method, the acquired spectra and images are analyzed and displayed in near real time in such a manner as to characterize functional and structural information of the target tissue.

A method and system for multi-spectral imagery acquisition and analysis, the method including capturing preliminary multi-spectral aerial images according to pre-defined survey parameters at a pre-selected resolution, automatically performing preliminary analysis on site or location in the field using large scale blob partitioning of the captured images in real or near real time, detecting irregularities within the pre-defined survey parameters and providing an output corresponding thereto, and determining, from the preliminary analysis output, whether to perform a second stage of image acquisition and analysis at a higher resolution than the pre-selected resolution. The invention also includes a method for analysis and object identification including analyzing high resolution multi-spectral images according to pre-defined object parameters, when parameters within the pre-defined object parameters are found, performing blob partitioning on the images containing such parameters to identify blobs, and comparing objects confined to those blobs to pre-defined reference parameters to identify objects having the pre-defined object parameters.

The invention discloses a nondestructive detection device and a nondestructive detection method for facility crop growth information, and belongs to the technical field of monitoring of facility crops. The device comprises a growth information sensing system, an electric control mechanical rocker arm and a control computer; the control computer drives the electric control mechanical rocker arm to be positioned at a detection position, and controls the growth information sensing system; reflection spectrums of nitrogen, phosphorus, potassium and moisture of crops, multispectral images, canopy temperature characteristic, multispectral morphological characteristics of canopies, stalks, plants and fruits, fruit quality information, and information of environmental illumination, temperature and humidity are acquired by using a multispectral imager and sensors of infrared temperature, irradiance, environmental temperature and humidity and load; nutrient and moisture characteristic spaces are acquired by optimizing and compensating the nutrient and moisture characteristics of the crops; and growth vigor information of canopy area, stalk thickness, fruit quality, plant height and the like is acquired by extracting the multispectral morphological characteristics of the crops, and comprehensive acquisition and nondestructive detection of the growth information of the crops are realized by combining nutrient, moisture and growth vigor characteristics.

The present invention provides a fluorescence detection and photodynamic therapy apparatus including: a combined light source unit 10 including a plurality of coherent and non-coherent light sources 11, 12 and 13 configured to irradiate light onto a to-be-observed object while performing continuous illumination; an optical imaging unit 20 configured to form an image of the to-be-observed object 70 and project the image to an image processing / controlling system 34; a multispectral imaging unit 30 including a one-chip multispectral sensor and the image processing / controlling system 34; a blocking filter 40 installed between the to-be-observed object 70 and the one-chip multispectral sensor 32, the blocking filter being configured to block some light reflected off from the to-be-observed object 70 while allowing some light and fluorescent light to pass therethrough; a computer system 50 configured to process, analyze, reproduce and store the image acquired from the multispectral imaging unit 30, and transfer the image to a display device 60 and control the overall operation of all the related elements; and the display device 60 configured to display a processing result of the image by the computer system 50.

Method and system for generating synthetic panchromatic imagery. A method for making a multi-spectral image includes capturing a panchromatic image of an imaging target. Additionally, the method includes capturing at least a first spectral image of the imaging target in a first spectral bandwidth, and capturing at least a second spectral image of the imaging target in a second spectral bandwidth. Also, the method includes determining at least a first spectral weight and a second spectral weight for the first spectral image and the second spectral image respectively. Additionally, the method includes generating a synthetic panchromatic image, determining a registration offset between the synthetic panchromatic image and the captured panchromatic image, warping the first spectral image and the second spectral image, and generating a multi-spectral image.

Improved methods, systems and apparatus relating to wide field fluorescence and reflectance imaging are provided, including improved methods, systems and apparatus relating to removal of background signals such as autofluorescence and / or fluorophore emission cross-talk; distance compensation of fluorescent signals; and co-registration of multiple signals emitted from three dimensional tissues.

Several aspects of the invention respectively record one or more multispectral (MS) images using at least one sensor array, each array getting one respective image and simultaneously polarization state at the array points; and get and displays a MS, multipolarization (MP) movie, at MS / MP frame rates that suit a scene or the acquisition; and get an MS image, and a polarization-state image, so that the two are inherently in register; and provide a digital camera for plural-waveband imaging, including polarization data, using a chip with an optically sensitive layer continuously spanning a field of view—for each of at least two substantially distinct bands, and with stacked layers, some radiation penetrating plural layers to a corresponding sensitive layer, and with a polarization mosaic over the stack to define a superpixel array that differentiates polarization states, and with an electronic shutter actuating the layers. Another aspect makes a time sequence of registered MS / MP images; and yet another gets data for one or more MS images, including polarization state at most image points, via a single, common aperture.

The present invention provides an apparatus for photodynamic therapy and fluorescence detection, in which a combined light source is provided to illuminate an object body and a multispectral fluorescence-reflectance image is provided to reproduce various and complex spectral images for an object tissue, thus performing effective photodynamic therapy for various diseases both outside and inside of the body.For this purpose, the present invention provides an apparatus for photodynamic therapy and photodetection, which provides illumination with light of various wavelengths and multispectral images, the apparatus including: an optical imaging system producing an image of an object tissue and transmitting the image to a naked eye or an imaging device; a combined light source including a plurality of coherent and non-coherent light sources and a light guide guiding incident light emitted from the light sources; a multispectral imaging system including at least one image sensor; and a computer system outputting an image of the object tissue to the outside. Thus, the apparatus for photodynamic therapy and photodetection of the present invention can effectively perform the photodynamic therapy and photodetection by means of the combined light source capable of irradiating light having various spectral components to an object tissue and the multispectral imaging system capable of obtaining images from several spectral portions for these various spectral ranges at the same time, thus improving the accuracy of diagnosis and efficiency of the photodynamic therapy.

The present invention provides a unique and novel system for acquiring digital images of identification documents such as drivers license, passports, or medical insurance records using a digital camera so as to establish a high resolution image and extracting data automatically with machine vision tools so as to acquire accurate data. The present invention teaches also a system that acquires multi-spectral images of both sides of the identification document.

Methods and systems are provided for performing a biometric measurement on an individual. A purported skin site of the individual is illuminated under a plurality of distinct optical conditions during a single illumination session. Light scattered beneath a surface of the purported skin site is received separately for each of the plurality of distinct optical conditions. A multispectral image of the purported skin site is derived from the received light. A biometric function is performed with the derived multispectral image.

A process of performing a medical test includes taking multi-spectral images of an area of interest of a patient. The patient can be a human being or an animal, and can be known to be healthy or known to have health issues or problems. A multi-spectral camera includes a long-infrared charge-coupled device, a mid-infrared detector array, and a control device that synchronizes operation of the charge-coupled device and the detector array. The mid-infrared detector array can include carbon nanotubes. The carbon nanotubes can be detector elements. For example, the carbon nanotubes can be tuned-bandgap carbon nanotubes. Each pixel of resolution of the detector array can include a balanced Wheatstone bridge circuit including one of the tuned-bandgap carbon nanotubes. Adjacent pixels of the detector array can be arranged for orthogonal polarization.

The invention relates to a method and a device for obtaining tri-dimensional and multi-spectral image simultaneously, which comprises an imaging optical system (1) and a focal plane component (2) which is arranged at the focus of the imaging optical system (1). The invention is characterized in that the focal plane component (2) comprises a light filter (201), a field diaphragm (202) and an area array CCD (203); the light filter (201), the field diaphragm (202) and the area array CCD (203) are arranged in sequence; the area array CCD (203) is connected with a digital data acquisition and processing system (3). The invention solves the technical problems of the complicated design and high price of the CCD chip of the area array CCD of a component. The invention has the advantages that the most important two parts in the system, which are a wide-angle optics and the area array CCD, can be easily bought in market, the specifications and models are many, the price is low, the development cycle is short, and the expense of the invention is lesser and the development cycle is shorter by comparing with the technical proposal of the specially developed CCD focal planes.

In an approach, hyperspectral and / or multispectral remote sensing images are automatically analyzed by a nitrogen analysis subsystem to estimate the value of nitrogen variables of crops or other plant life located within the images. For example, the nitrogen analysis subsystem may contain a data collector module, a function generator module, and a nitrogen estimator module. The data collector module prepares training data which is used by the function generator module to train a mapping function. The mapping function is then used by the nitrogen estimator module to estimate the values of nitrogen variables for a new remote sensing image that is not included in the training set. The values may then be reported and / or used to determine an optimal amount of fertilizer to add to a field of crops to promote plant growth.