1086 results about "Image measurement" patented technology

A line scan imager is used to determine the motion of a subject. Each line of image data from the line scan imager is compared with a reference image. The location of a matching line in the reference image reveals the displacement of the subject. The current subject displacement can be determined based on each line of image data. The resulting displacement information can be used to correctly place other optical beams on the subject. The method can be applied to tracking the human eye to facilitate measurement, imaging, or treatment with a beam of optical radiation.

Three-dimensional endoscopic measurements are made by adding an array of reference target points to the scene viewed by an endoscopic camera and characterizing the image formed by the camera when it views the scene from two or more viewing positions. Methods and apparatus are taught which allow one to make accurate measurements with any endoscope, without requiring any modification to the endoscope. Under certain circumstances, the measurements can be made without any pre-calibration of the endoscopic camera.A general measurement reference apparatus comprises a reference target array which is placed near to and fixed with respect to an object of interest inside an enclosure by means of a reference array holding apparatus and a reference array insertion apparatus. This measurement reference apparatus can be used to make either perspective dimensional measurements or to make conventional photogrammetric measurements of the object of interest.A general measurement apparatus to be used with the new methods comprises a reference target array which is placed near to and fixed with respect to an object of interest inside an enclosure by means of a reference array holding apparatus and a reference array insertion apparatus. In a version of this apparatus the reference array holding apparatus may attach the reference array directly to the object of interest and the combination may be inserted into the enclosure by the insertion apparatus. The general measurement apparatus also comprises an endoscopic camera located inside the enclosure. The camera is moved with respect to the object by a camera moving apparatus. Images formed by the camera are measured with an image measurement apparatus. These measurements are supplied to a computing apparatus which computes the desired three-dimensional distances. The measurement results are displayed to the user by a display apparatus.

A digital measurement apparatus measures a physical measurement object, provides a digital signature of public-key cryptography to measured data of a thus-measured physical quantity, and manages the measured data. The apparatus generates at least a pair of a public key and a private key, to be used for the digital signature of the public-key cryptography, through a key generating algorithm.

Non-imaging measurement is made of misalignment of lithographic exposures by illuminating periodic features of a mark formed by two lithographic exposures with broadband light and detecting an interference pattern at different wavelengths using a specular spectroscopic scatterometer including a wavelength dispersive detector. Misalignment can be discriminated by inspection of a spectral response curve and by comparison with stored spectral response curves that may be empirical data or derived by simulation. Determination of best fit to a stored spectral curve, preferably using an optimization technique can be used to quantify the detected misalignment. Such a measurement may be made on-line or in-line in a short time while avoiding tool induced shift, contact with the mark or use of a tool requiring high vacuum.

A three-dimensional map-generating apparatus and method using structured light. The apparatus for generating a three-dimensional map using structured light includes an odometer detecting the pose of a mobile robot, and a distance-measuring sensor including a light source module that emits light upward and a camera module that captures an image formed by light reflected from an obstacle, and measuring a distance to the obstacle using the captured image. The apparatus measures a distance to the obstacle using the distance-measuring sensor while changing the relative pose of the mobile robot, thereby generating a three-dimensional map.

A monitor which can detect respiration of a sleeping person without being affected by the attitude of the sleeping person or the indoor illumination light and can easily evaluate detected respiration quantitatively through image measurement. The monitor comprises means (1) for projecting a specified illumination pattern, means (5) for picking up the image of projected light continuously, means (7) for calculating inter-frame moving amount of the illumination pattern from the image of two frames acquired by the image pickup means at different times, means (8) for generating a moving amount waveform data comprising inter-frame moving amounts arranged in time series, and means (9) for detecting the movement of an object from the moving amount waveform data.

The invention relates to a meter box for housing a utility meter and configured for associating a customer service line to a utility service line. The meter box may be configured to fit within an existing meter box and may be configured with side sections in a telescopic arrangement. Flow control components at an input of the meter box prevent backflow.The meter box comprises an electronic module that includes a variety of selectable features including data logging, AMR, environmental monitoring, and resource monitoring. A remote monitor is provided for allowing a customer to view selected data including consumption data, pressure, pH, temperature, warnings, remote turnoff, and provide secured bill paying services. Imaging / audio components provide visual and audio data which may include an image of an analog readout for a meter register, images of the metering environment, and sound data for metering environment.

A method for automatically determining the 3D position and orientation of a radio-opaque medical object in a living body using single-plane fluoroscopy comprising capturing a stream of digitized 2D images from a single-plane fluoroscope (10), detecting the image of the medical object in a subset of the digital 2D images, applying pixel-level geometric calculations to measure the medical-object image, applying conical projection and radial elongation corrections (31) to the image measurements, and calculating the 3D position and orientation of the medical object from the corrected 2D image measurements.

A noninvasive image measuring method of measuring internal organ / tissue temperature using an MRI system. Temperature measurement insusceptible to body motion and spatial variation of magnetic field is realized by utilizing the position and size of a temperature change region as a priori information to determine the phase distribution of the complex magnetic resonance signal of water proton at a given temperature point and by subtracting the phase distribution before the temperature change estimated (self-referred) from the phase distribution in the peripheral region for each pixel of the image, thereby eliminating the subtraction process of image before and after temperature change. The precision of temperature measurement can be enhanced by estimating a complex curved surface formed of the peripheral region in each temperature change region of the real-part and imaginary-part images of the complex magnetic resonance signal, and calculating the phase difference between an actually measured complex signal distribution and the estimated complex signal distribution of the complex signal distribution for each pixel, thereby reducing the estimation error due to phase transition from −π to +π occurring in a phase distribution. Furthermore, temperature can be measured through optimal imaging following up body motion by using an optical positioning system in combination even if the part being measured is shifted.

A system for measuring angles includes a housing and an imaging device disposed in the housing. The system also includes a first optical element disposed in the housing and configured to receive light propagating from a first target along a first optical path and direct the light toward the imaging device and receive light propagating from a second target along a second optical path and direct the light toward the imaging device. The system further includes a processor in electrical communication with the imaging device and configured to receive data from the imaging device, compute a 360° angular map based on the received data, and determine an angular separation between the first target and the second target.

A device comprises: a shape measuring section 350 for measuring shape data from a pair of stereovision images of an object taken with an image taking section 220; a memory section 340 for storing target data related to the images of the object; an image display section 330 for superposing the paired stereovision images of the object and the stereovision target data image based on the target data and for displaying the images; and a comparison display processing section 360 for comparing the shape data of the object measured by the shape measuring section 350, with the target data and reflecting the results of the comparison on the superposed display on the image display section 330.

Provided is an optical image measuring apparatus forming a three-dimensional image based on tomographic images of an object, acquired at various depths even when the object moves during measurement. Including a half mirror (6) for dividing a light beam signal light (S) and reference light (R), a frequency shifter (8), a reference mirror (9) and a piezoelectric element (9A) used to change an optical path length of the reference light (R), CCDs (21, 22) for receiving interference light beams (L) resulting from interference light produced by superimposing the signal light (S) and the reference light (R) on each other by the half mirror (6) and outputting detection signals, an image forming portion for forming tomographic images based on the detection signals, a measurement depth calculating means (53), and an image processing portion (57). Forming a three-dimensional image or the like based on the arranged tomographic images.

A working apparatus comprises a working unit which executes work on a work subject, and a calibration jig on which a plurality of markers is arranged in a radial pattern from a center point of markers, the plurality of markers being arranged in three dimensions, and the calibration jig being attached to a working unit such that a calibration reference point set of a working unit coincides with a center point of markers. According to such a composition, it becomes possible to calibrate a position of a working unit even when a portion of the jig containing a center point of markers is occluded during image measurement.

In a multi-charged-particle-beam apparatus, when an electric field and voltage on a surface of a specimen are varied according to characteristics of the specimen, a layout of plural primary beams on the surface of the specimen and a layout of plural secondary beams on each detector vary. Then, calibration is executed to adjust the primary beams on the surface of the specimen to an ideal layout corresponding to the variation of operating conditions including inspecting conditions such as an electric field on the surface and voltage applied to the specimen. The layout of the primary beams on the surface of the specimen is acquired as images displayed on a display of reference marks on the stage. Variance with an ideal state of the reference marks is measured based upon these images and is corrected by the adjustment of a primary electron optics system and others.

Provided is an optical image measuring apparatus capable of taking images of an object to be measured in plural depth regions in parallel. An optical image measuring apparatus of the present invention includes: a beam splitter (4) for dividing a light beam into signal light (S) and reference light (R); beam splitters (5-1 to 5-(n−1)) for dividing the reference light (R) into plural reference light beams (R1 to Rn); frequency shifters (6-1 to 6-n) for shifting frequencies of the reference light beams (R-1 to Rn) by different amounts; and reflector plates (7-1 to 7-n) arranged at different distances from an object to be measured (O). The reference light beams (R1 to Rn) and the signal light (S) reflected by the object to be measured in depth regions (D1 to Dn) are superimposed on each other to thereby produce interference light (L). Shutters (9-1 to 9-3) extract interference light components (L1 to Ln) from the reference light (L), and CCD cameras (10-1 to 10-3) receive the interference light component and convert the interference light component into electrical signals to output the signals. A computer (20) forms images in depth regions corresponding to the interference light components based on the electrical signals.

A lake wetland flood remote sensing monitoring method based on a model comprises the steps that: (1) the lake wetland time series multi-source remote sensing image data is acquired; (2) the water body in the remote sensing image is (semi-) automatically extracted; (3) the boundary is detected and confirmed between the water and the land, and the practical water area is calculated; (4) the data of the water area and the water level estimated by the remote sensing is carried out nonlinear statistic to modeling; (5) the acquired micro wave remote sensing image in the flood period is used, the established model is compared and validated, and the model is corrected; (6) based on the established high accuracy water area water level area distribution math model and the common remote sensing change monitoring method, the practical measured water level is combined with the acquired remote sensing image, the continuous real time monitoring to the wetland flood dynamic change is achieved. The invention can be compensated each other with a common earth surface environment change multi-time phase remote sensing image measurement method, and the invention has the important roles to the dynamic change monitoring of the wetland flood and the wetland process modeling research.

The invention discloses an unmanned rotorcraft automatic pesticide applying system and method based on stereoscopic measurement. The system comprises an unmanned rotorcraft, a relative height measurement module, a crown image measurement module, a pesticide applying decision making module and a pesticide applying control module. The method comprises the following steps that pesticide applying decision making information is pre-input into a ground-based computer; the unmanned rotorcraft is controlled to hover over a fruit tree; the relative height delta H away from a crown, GPS positioning data and crown area data are measured; the pesticide applying decision making module sends an instruction for regulating and controlling the pesticide applying mode of the unmanned rotorcraft according to the relative height delta H, the GPS positioning data and the crown area data; the pesticide applying control module regulates the flying attitude and the number of spray heads according to control information of a remote control module, and then pesticide is sprayed. According to the system and method, height measurement is accurate, the measuring range is wide, and adjustment is easy; the measurement cost is low, omission is avoided, and errors are small; pesticide applying waste or inefficient pesticide applying is avoided; pesticide applying is precise.

Provided is an apparatus for user interface based on wearable computing environment includes: a signal measurement unit including a plurality of image measurement units that includes image sensors each of which receives optical signals generated from a position indicator that is worn on user's fingers or near a user's wrist to generate optical signals and measures images of the user foreground; and a signal processor that analyzes each image measured by the signal measurement unit to measure three-dimensional coordinates, recognizes a motion pattern of the user's hand on the three-dimensional coordinates from the optical signals received by the signal measurement unit, and outputs the corresponding instructions.

The invention relates to an on-line detection method for diameter size of a shaft disc type part, and belongs to the technical field of image measurement, which can detect variation in the diameter size during processing of the shaft disc type part in real time and guarantee higher detection efficiency and measurement accuracy. The method comprises the following steps of: calibrating internal parameters of a charge coupled device (CCD) video camera and correcting distortion of an image caused by lens distortion based on a CCD video camera plane calibration method; calibrating external parameters of the CCD video camera, acquiring the image of the shaft disc type part with a known diameter by using the CCD video camera, extracting two edges of the part from the image by a subpixel edge detection algorithm, and calibrating to acquire external parameters of the part relative to the CCD video camera by using coordinates of the subpixel edges and the acquired internal parameters of the camera video; and finally, measuring, acquiring the image of the detected shaft disc type part by using the CCD video camera, extracting the subpixel edges of the part and calibrating to acquire the internal parameters and the external parameters so as to solve the diameter size of the detected part.

Systems and methods for evaluating prospective treatments for progressive brain disorders like Alzheimer's disease and the progressive effects of aging involve the use of an imaging device communicatively coupled to a computing device. The imaging device may takes a plurality of brain imaging measurements from each of a plurality of human subjects who are divided into a treated group and an untreated group based on various subject data including whether the subjects carry certain alleles of genes known to increase the risk of developing the brain disorder at issue. The computing device receives the brain imaging measurements from the imaging device and applies an advanced processing method that permits enhanced computational efficiency when calculating rates of change for the two groups and determining whether any calculated difference between the rates is statistically significant.

[Objective] Providing a medical image diagnostic apparatus which can mitigate an operational burden at the time when measurement processing is performed by use of a medical image.[Means for Solution] An ultrasonic diagnostic apparatus 100 acquires input image information, which is image data of a subject, and holds it in a storage section 3. An image selection section 8 performs image recognition calculation for comparison between the input image information and past image information pieces of an image measurement database 7. When the image recognition has succeeded, a measurement-position setting section 9 refers to a record of image measurement information including a past image information piece most similar to the input image information, retrieves measurement position information of the record, and sets it. A measurement-position setting processing section 6 displays the measurement position on a display section 12 such that it is superimposed on the input image information 21. A measurement calculation section 11 performs measurement calculation for the measurement position set by the measurement-position setting section 9, and displays measurement results on the display section 12. The measurement-position setting processing section 6 updates the image measurement database 7 on the basis of the input image information, the measurement position set by the measurement-position setting section 9, etc.

The present invention relates to a five-shaft image measurement device used for measuring the film hole shape and position parameters. The five-shaft image measurement device can be used to obtain theshape and position parameters, such as the apertures of the film hole characteristics on a hollow turbine blade in an aero-engine, the axis space angle, the hole central coordinates, etc. thereby really describing the actual state of each film hole, and comprehensively evaluating the processing quality of each film hole. The five-shaft image measurement device of the present invention is based onthe machine vision measurement principle, adopts an illumination mode of combining the backward illumination and the forward illumination, changes the space position and attitude between the measuredhollow turbine blade and an image acquisition device via the linkage of three linear shafts and two rotating shafts, and determines the alignment accuracy of the image acquisition device and the measured film holes based on the shape characteristics of the acquired film hole images. The five-shaft image measurement device of the present invention is compact in structure and high in measurement precision, is convenient to use, and can measure automatically, thereby providing the technical means of detecting the processing quality of the film holes with high precision, high efficiency and highreliability. The five-shaft image measurement device also can be used as a universal five-shaft image measurement device.

A size measurement device for measuring a size of an object from a captured image of the object includes: an imaging unit that captures an image of an object; a display unit that displays image data captured by the imaging unit; an input unit for inputting instructions of a user; a region setting unit that, when positions are designated with the input unit in the image data displayed on the display unit, sets surrounding regions including therein respective designated positions; and a feature point determination unit that determines, in the surrounding regions set by the region setting unit, feature points providing coordinates of the object to be measured.

The invention discloses an automatic large engine part butting device, and belongs to the technical field of engine assembly. The butting device comprises a motion butting bracket assembly, a gesture adjusting bracket assembly, an image measurement assembly, a laser ranging sensor assembly, an inclination angle sensor assembly, a stepper motor assembly and a computer control assembly. Through reasonable design, mounting and matching of the above assemblies, measurement data of the image measurement assembly, the laser ranging sensor and the angle sensor are acquired and processed by the computer control assembly; motion control is carried out on the stepper motor motion assembly; and automatic gesture adjusting and butting of two sub parts of the large engine part in the space six-degree of freedom can be realized on the gesture adjusting bracket assembly and the motion butting bracket assembly. Development requirements on efficient and precise butting of large parts during the engine development and production process can be met.

The invention discloses a camera external parameter calibration method of a multi-camera system for solving the problems that a three-dimensional precise calibration object is difficult to manufacture, the efficiency of a multi-camera external parameter calibration process is low, and that accumulative errors are generated in the existing method. The method comprises the following steps: performing fitting to obtain quadratic curve matrixes of shooting ball projections of cameras; solving inhomogeneous coordinates of three spherical centers in a camera coordinate system; establishing a world coordinate system in which the three spherical centers are located on the same plane through the plane where the three spherical centers are located and the positions of the spherical centers; solving external parameters of a plurality of cameras in the world coordinate system in which the three spherical centers are located on the same plane, and accomplishing the external parameter calibration of the cameras in the multi-camera system, wherein the two coordinate systems are overlapped. By adoption of the camera external parameter calibration method disclosed by the invention, the external parameters of the plurality of cameras in the same world coordinate system are calculated quickly, conveniently and accurately without requiring more conversion, no accumulative error is generated, and the camera external parameter calibration precision is high. The camera external parameter calibration method is applied to the fields of image measurement, three-dimensional reconstruction, unmanned aerial vehicle navigation, etc.