149 results about "Linear Scan" patented technology

A range-pattern-matching-type DRC-based process hotspot detection is provided that considers edge tolerances and incomplete specification (“don't care”) regions in foundry-provided hotspot patterns. First, all possible topological patterns are enumerated for the foundry-provided hotspot pattern. Next, critical topological features are extracted from each pattern topology and converted to critical design rules using Modified Transitive Closure Graphs (MTCGs). Third, the extracted critical design rules are arranged in an order that facilitates searching space reduction techniques, and then the DRC process is sequentially repeated on a user's entire layout pattern for each critical design rule in a first group, then searching space reduction is performed to generate a reduced layout pattern, and then DRC process is performed for all remaining critical design rules using the reduced layout pattern. Candidate locations are then identified using the DRC results, and then the true hotspot locations are confirmed using longest common subsequence and linear scan techniques.

A method for reducing thermal effects in laser ablation optical emission spectrometry includes creating discrete ablation spots along an analysis line on a target surface. At least one of the following is also carried out. First, the ablation spots are positioned so that a pair of successive ablation spots are spaced apart from one another along the analysis line and are separated from one another by another ablation spot. Second, when the analysis line comprises generally parallel, adjacent analysis line segments, the ablation spots are positioned so that (A) a pair of successive ablation spots are on different analysis line segments, and (B) the successive ablation spots are positioned to be at different longitudinal positions along the analysis line segments when the different analysis line segments are adjacent to one another. As a result, a linear scan of isolated ablation spots can be generated.

A magnetic tape apparatus, in which an intensity ratio of peak intensity of diffraction peak of (110) plane with respect to peak intensity of diffraction peak of (114) plane of a hexagonal ferrite crystal structure obtained by XRD analysis of the magnetic layer by In-Plane method is 0.5 to 4.0, a vertical squareness ratio of the magnetic tape is 0.65 to 1.00, a reading element unit includes a plurality of reading elements each of which reads data by a linear scanning method from a specific track region including a reading target track in a track region included in the magnetic tape, and an extraction unit performs a waveform equalization process according to a deviation amount between positions of the magnetic tape and the reading element unit, with respect to each reading result for each reading element, to extract data derived from the reading target track from the reading result.

Methods and systems for forming face masks are disclosed. Embodiments may utilize computer-aided design and computer-aided manufacturing to form custom fitted face masks. System software may be configured to acquire facial topography information, design a mask based on the topography information, and send mask information to a computerized manufacturing device. The software may communicate with a scanning device for facial topography acquisition and a milling machine for pattern fabrication. In an embodiment, the scanning device may include a linear scan non-contact laser imager. In an embodiment, the scanning device may be manually moved with respect to an individual being scanned, thereby eliminating the need for motive apparatus. In such embodiments, position information may be determined based on data from a position sensor coupled to the scanning device.

A method for detecting 3-D defect on surface of strip material includes projecting parallel short-tilted line array light belt onto surface of mobile strip material to be detected, receiving reflection light by linear scan video camera set above said strip material, carrying out preliminary judgment on collected image and classifying defects according to lien form variation on image, converting image with defects to be digital signal being inputted into computer then calculating out relative height of each point to finalize treatment on image.

In a method for generating an image of an examination subject with a tomography-capable X-ray device, particularly a computed tomography device, having a multi-row X-ray detector array, an X-ray radiator that rotates about a system axis and emits a conical x-ray beam, and a positioning device by means of which the subject is positionable relative to the X-ray radiator in different z-positions in a direction parallel to the system axis, the image is reconstructed from the raw data that are generated from the X-ray radiator. Raw data are generated from both a rotation scan and a linear scan. In the linear scan, all transmission values for the image reconstruction are acquired in one continuous linear scanning movement, so that the rotation scan can be picked up while the X-ray radiator is in continuous rotation. A topogram that is executed prior to the actual rotation scan for the purpose of selecting a region of interest of the subject for the subsequent rotation scan can be utilized as a linear measurement dataset. A particularly rapid acquisition of initial data for the subsequent 3D image reconstruction occurs.

A system and method for inspection is disclosed. The design includes focusing illumination beams of radiation at an optical axis to an array of illuminated elongated spots on the surface at oblique angle(s) of incidence to the surface, performing a linear scan along a linear axis, wherein the linear axis is offset from the optical axis by a not insubstantial angular quantity, and imaging scattered radiation from the spots onto an array of receivers so that each receiver in the array receives scattered radiation from a corresponding spot in the array of spots.

An ultrasonic imaging apparatus captures a plurality of B-mode images of a same cross section respectively by a plurality of linear scans with different directional ultrasonic beams and creates and displays a compound image from the plurality of B-mode images. The ultrasonic imaging apparatus includes a device for capturing an image to capture a plurality of B-mode images respectively by a linear scan with an ultrasonic beam steered to a reference direction and a linear scan or scans with an ultrasonic beam or beams steered to one or more directions different from the reference direction, a device for creating an image to create a compound image using the plurality of B-mode images, and a display device to display the compound image.

In the ultrasonic nondestructive testing field, the traditional time of flight diffraction (TOFD) is used for finding defects of a welding line by only using a longitudinal wave scattering signal; because the type of used signals is single, the three-dimensional positioning of the internal defect of the welding line cannot be realized by the single linear scanning. Aiming the problem, the invention provides a transverse wave TOFD detecting method; one pair of transverse wave probes are used for performing the single linear scanning along the welding line; at the same time, the longitudinal wave and the transverse wave scattering signals of the internal defect of the welding line are used for analyzing to point out that the defect is located on an elliptic trajectory determined by the transverse wave scattering signal and is also located on a circular trajectory determined by the longitudinal wave scattering signal, thus the three-dimensional positioning of the internal defect of the material can be realized by obtaining the intersecting point of the two curves.

A lightweight, compact image projection module, especially for mounting in a housing having a light-transmissive window, is operative for sweeping a composite laser beam as a pattern of linear scan lines on a planar projection surface and for causing selected pixels arranged along each linear scan line to be illuminated to produce an image of high quality and in color.

The invention provides a dynamic non-uniformity correction method for a linear scanned image based on image sequence analysis. The dynamic non-uniformity correction method comprises the following steps: firstly, selecting k (k is equal to 1, 2,..., and belongs to Z) images for the existing image to be corrected, and setting an ideal desired value q; then, calculating the average value of pixel values on each row of the k images to acquire a mean vector; and finally, using a ratio of the mean vector to the set ideal desired value as a correction coefficient to correct the images, so that a novel image which is uniform in background, clear in defect contour and convenient to position a subsequent defect target is acquired. The method can effectively overcome influences of changes of such factors as parameters including material specification, thickness and the like of the detected object, detection angle, plate type consistency and light source illumination attenuation, so as to dynamically acquire in real time an ideal image which is uniform in grey distribution, high in definition and remarkably enhanced in the detected object, thus greatly simplifying subsequent image processing difficulty and effectively improving the real-time performance of the integral system.

A close-range photogrammetry colorful three-dimensional scanning laser radar comprises colorful laser light sources, a transmission optical system, a scanning system, a receiving optical system, a laser spectrum detection and distance-measuring circuit, a data collection and time sequence controller and a computer data processing unit. The colorful laser light sources comprise a red light pulse laser light source, a green or yellow light pulse laser light source, a blue light pulse laser light source and an infrared pulse laser light source, lasers emitted by the colorful laser light sources are synthesized into a laser beam through the transmission optical system, and are incident to the scanning system, colorful laser three-dimensional linear scanning is performed on a target ground object through the scanning system, echo signals formed by scanning are captured by the optical receiving system, intensity of pulse lasers obtained by detection of the laser spectrum detection and distance-measuring circuit and distance information of the target ground object are transmitted to a data collecting and time sequence controller for multi-channel data collection and time sequence calculation, and the result is output to the computer data processing unit.

The invention relates to an industrial camera cylinder detection method. A workpiece to be detected is sent to a feed driving wheel by a driving synchronous belt, and the workpiece is then sent to a detection station by the feed driving wheel. When the workpiece reaches the detection station, the workpiece is driven by a driving wheel to rotate. At the moment, backlight is turned on, operation mode of a camera is set to be an area-array sampling mode so as to acquire an outer contour area-array image of the detected workpiece, and diameter and height of the detected workpiece are calculated. Then, rotating speed of the workpiece is obtained by an encoder which is coaxial with the driving wheel; linear scan frequency is calculated; the operation mode of the camera is set to be a linear array mode; linear scan frequency is set; a linear-scan light source is turned on; a lateral surface image of the workpiece is acquired, surface defects of the workpiece are recognized, and the detection is finished. According to the detection result, whether the workpiece is qualified and the grade of the workpiece are judged, so as to classify the workpiece.

The invention discloses a detecting method for tobacco package and its setting. The method adopts the X ray linear scan technology to detecting the defects of packing, rolling and producing in the tobacco packaging process, which mainly is :appending a long narrow aperture in front of the X-ray generator so as to make the X ray forming a thin fan-shaped planar beam after transmitting it, adopting this fan-shaped planar beam to linearly scan the tobacco package, and using a detector which can receive X ray to receive the transmitted X-ray directly, the clairvoyance digital image can be receive by computer after processing, so as to recognize the short of bars or packs in a whole box, of packs or number in a whole bar, of number in a whole pack and other quality problems produced in the packing and rolling process so as to remove the unqualified products with eliminating equipment. The principle and structure of the invention is more rational and simple, high sensitive and capable of detecting dynamically compared to current techniques.

The invention relates to a linear scan image heterogeneity correction method based on continuous statistics constraint module that is used to scan image. It includes the following steps: gaining initial image correction parameter, taking heterogeneity correction and output the corrected image, gaining the new correction parameter; taking correction to the new corrected parameter and the original corrected parameter with the original correcting parameter module; repeating the step b-d until achieving the preset request. The invention could also be used in gray image.

A process of rapid and highly accurate analysis of spectral data, includes both a linear scanning (LINSCAN) method and an advanced peak detection method for pattern recognition. One or both of the methods are used to support the detection and identification of chemical, biological, radiation, nuclear and explosive materials. The spectra of various targets can be analyzed by the two spectral analysis methods. These two methods can be combined for dual confirmation, greater accuracy, and to reduced false positives and false negatives, relative to what can be accomplished by either alone.

The invention provides a laser device and a method for controlling the length of a driven cavity of a seed injection laser. The control method is described as following: the back cavity mirror is adhibited to a piezoelectric ceramics, and a piezoelectric ceramics driving circuit applies a linear scanning voltage on the piezoelectric ceramics during each pumping pulse, and turns on a Q switch when the seed light transits the driven cavity thereby forming interference signal peak, and then emits single longitudinal mode Q-switched laser, meanwhile, a sequential control system executes feedback control to the delay time of scanning voltage initial time relative to pumping pulse initial time as soon as pulse finishing, so that each moment of turning on the Q switch is at the position same with that of the pumping pulse trailing edge. The probability that the invention can emit single longitudinal mode pulse is close to 100%, so that the energy stabilization between pulses can be greatly improved.

The present invention provides a method for detecting a tunnel bottom base multi-layer karst cave. According to the method, firstly a geological analysis method is used to analyze geomorphology, and with foundation excavation, an infrared ray temperature detection method and a geological drilling detection method are used to determine the natures of strata rocks and lithologic distribution and aninterface; the subsequent geological radar detection and positions of survey lines and survey points of an acoustic reflection method; after the completion of the above foundation trench excavation, the survey lines and survey points are demarcated, and a geological radar detection method is used to carry out linear scan of the geological radar; and finally a sound wave reflection method test is carried out. The detection method provided by the invention is a reasonable and effective combination of multiple detection methods, the combination of qualitative judgment and quantitative judgment isadopted, and a condition that a large number of field implementation processes occupies the effective time of construction is reduced. Used radar detection equipment is highly practical and is easy and convenient to operate.

A magnetic tape apparatus, in which a magnetic tape includes a servo pattern in a magnetic layer, ΔSFD in a longitudinal direction of the magnetic tape is equal to or smaller than 0.50, a reading element unit includes a plurality of reading elements each of which reads data by a linear scanning method from a specific track region including a reading target track in a track region included in the magnetic tape, an extraction unit performs a waveform equalization process according to a deviation amount between positions of the magnetic tape and the reading element unit, with respect to each reading result for each reading element, to extract data derived from the reading target track from the reading result, and the deviation amount is determined in accordance with a result obtained by reading of the servo pattern included in the magnetic layer of the magnetic tape by a servo element.

A linear laser phase-shift interference triangular micro-displacement measuring device and method belong to the technical field of ultra-precision measurement. According to the invention, a phase-shift interference technology and a laser triangulation technology are combined to realize wide-range and high-precision micro-displacement measurement. According to the phase-shift interference principleand the laser triangulation principle, a light source output is changed into a linear parallel beam by adopting shape beam expansion, and four linear interference beams with 90-degree phase shifts insequence are obtained synchronously by grating beam splitting and a four-quadrant analyzer group. Meanwhile, a linear laser triangulation system obtains rough displacement measurement data by partialdiffuse reflection light. When the maximum error of linear laser triangulation measurement is less than 1/4 of an interference signal period, an accurate displacement value can be obtained by certainsolution. The measuring accuracy is high, the measuring range is wide, linear scan measuring can be realized, and the measuring device and method are suitable for measuring the step height, the filmthickness, the displacement/position of a moving part and the like in a microstructure device.

A multi-functional ultrasound imaging system includes a scan imaging unit having a transmitting unit, a receiving unit, and a probe that is one of a linear array probe and a convex array probe, wherein the probe has a certain deflection angle. The system also includes a control unit configured to control said scan imaging unit to realize one of normal linear scan and additional sector scan, normal convex scan and additional sector scan. The system also includes an image processing unit configured to process image signals generated by said scan imaging unit and to convert the image signals into image data corresponding to an ultrasound image, and a display unit configured to generate the ultrasound image corresponding to the image data.