Abstract: A method includes transmitting a first digital channel (X0) from a reader to a marker, receiving a second digital channel (Y0) corresponding to the first digital channel and to errors introduced by a noisy channel, introducing artificial errors into at least one of the first or second digital channels, carrying out an advantage distillation phase in such a way that a new first digital channel (X1) is determined for the reader. A new second digital channel (Y1) is determined for the marker such that the advantage is taken with respect to a possible passive attacker. In an information reconciliation phase, an error-correcting protocol is applied to the new first (X2) and new second (Y2) digital channel, and in carrying out a secrecy amplification phase, a hash function (G) is applied to the new first (X2*) and the new second (Y2*) digital channel.

Abstract: A CT imaging system includes a computer that is programmed to rebin cone beam projection data into a series of two-dimensional sinograms based on an optimized ray consistency approach. The computer receives cone beam data from a detector array and is programmed to specify a plurality of view angles for the cone beam data. The computer selects a plurality of measured rays for each of the plurality of specified view angles, the plurality of measured rays having a view angle approximate to the specified view angle as determined by an optimized ray consistency. The computer also forms a two-dimensional sinogram for each of the plurality of specified view angles based on the selected plurality of measured rays. The computer then defines an image surface for each of the plurality of specified view angles based on the selected plurality of measured rays.

Abstract: The invention relates to a method of determining an identifier of determined discriminating power from biometric data. According to the method, biometric data is obtained relating to an individual. The biometric data is converted into a digital string. A word of an error-correcting code is associated with the individual. The error-correcting code word is added to the digital string. An identifier relating to the individual is determined by applying a hashing function to the error-correcting code word, the hashing function being selected to ensure the determined discriminating power to said identifier.

Abstract: An embodiment of the invention includes a radiation detecting pixel array. The radiation detecting pixel array includes a substrate, a plurality of radiation detecting pixels arranged in a grid pattern on the substrate, a signal routing array embedded within the substrate in operative communication with the plurality of radiation detecting pixels, and at least two symmetrical communication channels arranged on each of two sides of the grid pattern. The signal routing array is formed of communication channels configured to provide operative communication between any of the plurality of radiation detecting pixels and each of the at least two symmetrical communication channels.

Abstract: In one aspect, a method of using a recording device in a luggage inspection system is provided. The method includes establishing an inspection workstation including an inspection area and a scanner, and providing a user interface. The method also includes positioning the recording device to record at least one luggage inspection, scanning an identification number, and storing the identification number by date and time. Moreover, the method includes inspecting contents of at least one item of luggage, recording the luggage inspection and associating the identification number with a corresponding luggage inspection.

Abstract: Methods, a processor, and a system for improving an accuracy of identification of a substance are described. One of the methods includes determining whether a relative molecular interference function of the substance includes at least one peak.

Abstract: System and method for XRD-based threat detection. An object is scanned with a first threat detection system. One or more alarm objects are identified. Data about the one or more alarm objects is passed from the first threat detection system to a second threat detection system and is used to move and/or to rotate the object in a predetermined ray path that decreases attenuation of scattered x-ray radiation. Also disclosed is a secondary collimator for XRD-based false alarm resolution in computed tomography {“CT”) threat detection systems. The secondary collimator comprises one or more slit apertures configured to provide a multi-angle capability that extends a range of momenta for which XRD intensities are measured for a predetermined range of photon intensities.

Abstract: An image processing device includes: processing pixel group determination unit that determines a to-be-processed pixel group from a plurality of frame images of picture signals input based on a first predetermined rule and that determines a processed pixel group from the processed frame image stored based on a second predetermined rule; frequency component processing unit that extracts at least a temporal frequency component from the to-be-processed pixel group and the processed pixel group, that executes predetermined coefficient processing on a temporal high-frequency component of the temporal frequency component and that acquires the executed to-be-processed pixel group; processing completion frame generation unit that generates a processing completion frame image from the executed to-be-processed pixel group; and image output unit that outputs the processing completion frame image and that stores the processing completion frame image in the processed frame storage unit, in which the frequency component pr

Abstract: A detector for identification and localization of radioisotopes, comprising a position sensitive detector configured to observe the location of emitted high energy radiation, wherein the position sensitive detector comprises a surface comprised of a first radiation sensitive material; and an active mask disposed in front of the position sensitive detector positioned such that the emitted high energy radiation is detected by the position sensitive detector after passage through the mask, wherein the mask comprises a second radiation sensitive material.

Abstract: A device for acquiring images of a print of at least a portion of a user's hand, the device comprising a stand defining an acquisition zone extending substantially in a plane, an optical acquisition member that is fastened to the stand to have a field of view covering the acquisition zone, and a processor unit connected to the acquisition member to process an image signal coming therefrom, wherein: the stand is arranged to provide an empty space zone containing the acquisition zone and forming a passage for said portion of the hand while moving parallel to the plane; the device includes at least one projector member for projecting a light test pattern of at least two colors into the acquisition zone; the optical acquisition member has a depth of field extending on either side of the acquisition zone and it possesses a color sensor having an acquisition speed that is sufficient to capture at least one color image of said portion of the hand moving at a predetermined maximum speed of movement; and the proces

Abstract: A method for calibrating a detection system including a multi-focus X-ray source includes performing a scan of a calibration material using the detection system to acquire scan data, determining a diffraction profile of the calibration material using the scan data, deriving an actual scatter angle using the determined diffraction profile, deriving an offset angle using the determined actual scatter angle, storing the derived offset angle, and generating a table including the stored offset angle.

Abstract: The invention relates to a method of checking the authenticity of biometric sensing performed optically, in which a body organ (6) placed on a main face (2) of a prismatic optical element (1) is illuminated (8) with total internal reflection, and then the reflected radiation carrying the biometric image of said body organ is picked up (9). The method comprises the steps of superposing on the main illumination (8) on the main face (2) of the prismatic optical element (1), encoding illumination (14) in such a manner that it is the encoded combined radiation that is reflected by said main face (2) and picked up (9), and comparing (17) the encoded combined radiation with the encoding of the encoding illuminating radiation; thereby detecting the authenticity of the reflected radiation conveying the biometric image associated with the body organ placed on the main face.

Abstract: A method for assembling a secondary collimator including a first face plate having a first surface and an opposing second surface is provided. The method includes positioning a lamella assembly on the first face plate, wherein the lamella assembly includes at least one radiation-absorbing material layer and at least one radiation-transmitting material layer, such that a first surface of the lamella assembly is adjacent the second surface of the first face plate. The method also includes coupling a second face plate to the first face plate and the lamella assembly such that a first surface of the second face plate is adjacent a second surface of the lamella assembly.

Abstract: A technique is provided for detecting whether an object of interest is being carried by a subject. The technique includes coarsely scanning the subject with an electromagnetic radiation, measuring reflective intensity of radiation reflected from the subject, and detecting the presence or absence of the object of interest based upon the measured reflective intensity.

Abstract: A system and method for ascertaining the identity of an object within an enclosed article. The system includes an acquisition subsystem, a reconstruction subsystem, a computer-aided detection (CAD) subsystem, and an alarm resolution subsystem. The acquisition subsystem communicates view data to the reconstruction subsystem, which reconstructs it into image data and communicates it to the CAD subsystem. The CAD subsystem analyzes the image data to ascertain whether it contains any area of interest. A feedback loop between the reconstruction and CAD subsystems allows for continued, more extensive analysis of the object. Other information, such as risk variables or trace chemical detection information may be communicated to the CAD subsystem to dynamically adjust the computational load of the analysis.

Abstract: An energy-sensitive computed tomography system is provided. The energy-sensitive computed tomography system includes an X-ray source configured to emit an X-ray beam resulting from electrons impinging upon a target material. The energy-sensitive computed tomography system also includes an object positioned within the X-ray beam. The energy-sensitive computed tomography system further includes a detector configured to receive a transmitted beam of the X-rays through the object. The energy-sensitive computed tomography system also includes a filter having an alternating pattern disposed between the X-ray source and the detector, the filter configured to facilitate measuring projection data that can be used to generate low-energy and high-energy spectral information.

Abstract: A system for detecting contraband. A container is scanned with a first type of contraband detection apparatus. Based on results of the first scan, a plurality of risk values, which correspond to particular types of contraband, are generated. The container is then scanned with a second type (and/or a third type) of contraband detection apparatus. Based on the results of the second scan (and/or the third scan), the risk values are modified. If the combined risk values are above a predetermined value, an alarm is triggered.

Abstract: Apparatuses and method are provided. For example, in one embodiment, a ring electrode includes a plurality of sub-rings adapted to provide an electric field inside a spectrometer. The sub-rings have an internal sub-ring radius. There is a ring insulator between adjacent sub-rings. Each said ring insulator has substantially the same internal radius as the sub-rings. In another embodiment, a method is provided for insertion of the ring electrode inside the spectrometer.

Abstract: A method for generating an image of an object using a scanning system includes performing a first portion of a scan in a first scanning mode to acquire a first dataset, receiving a halt command for a conveyor within the scanning system, decelerating the conveyor to a halt based on the halt command using a conveyor controller, and, when the object is present within an examination region after the conveyor has halted, performing a second portion of the scan in a second scanning mode to acquire a second dataset. The second scanning mode is different than the first scanning mode. The method also includes reconstructing the first dataset using a first reconstruction algorithm and reconstructing the second dataset using a second reconstruction algorithm. The second reconstruction algorithm is different than the first reconstruction algorithm. The image is generated using the first reconstructed dataset and the second reconstructed dataset.

Abstract: A method for developing a primary collimator is described. The method includes placing a primary collimator element at an intersection of a first set of at least two beams.