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297 results about "X-Coordinate" patented technology
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A horizontal coordinate that is used together with a vertical coordinate to specify an exact point in space.
Method for analyzing irreversible apneic coma (IAC)
An method for analyzing irreversible apneic coma (IAC) for determining the presence of irreversible apneic coma (IAC) by analyzing the heart rate variability of a brain traumatic patient, thereby providing a physician a reference index to determine whether brain death has occurred. This method includes, at first, recording an electrocardiogram (ECG) from a subject. Then, analyzing R-R interval in said electrocardiogram (ECG), and plotting said R-R interval into Poincaré plot, wherein the X coordinate in said Poincaré plot represents R-R interval(n), and n is a 1˜data number. Y coordinate in said Poincaré plot represents RR(n+1). And, finally, quantifying said Poincaré plot, and obtaining semi-major axis (SD1), semi-minor axis (SD2), and SD1 / SD2 of said Poincaré plot, as well as Poincaré plot area.
Owner:YUAN ZE UNIV
Display input device
ActiveUS20110285657A1Improve usabilityEasy to useInput/output processes for data processingTouch panelInput device
A display input device includes a control unit for correcting horizontal coordinates of an object to be detected on an xy coordinate plane extending on a touch panel 1, which are acquired by a proximity sensor 12, according to an angle of elevation φ, an angle of deviation θ and a vertical distance z between the object to be detected and a surface of the touch panel, φ being the angle of a straight line OC with respect to the surface of the touch panel, the straight line OC extending between a predetermined point O positioned on the touch panel and a predetermined point C positioned outside the touch panel, and θ being the angle between a straight line which is an orthogonal projection of the line OC onto the xy coordinate plane, and an x axis on the xy coordinate plane.
Owner:MITSUBISHI ELECTRIC CORP
Visual navigation/inertial navigation full combination method
InactiveCN103424114AHigh precisionReduce precisionNavigation by speed/acceleration measurementsComputer visionLeast squares
The invention relates to a visual navigation / inertial navigation full combination method. The method comprises the following steps: first, calculation of visual navigation: observation equations are listed based on collinearity equations, carrier positions and attitude parameters are obtained through the least square principle and adjustment,, and variance-covariance arrays among the parameters are calculated; second, calculation of inertial navigation: navigation calculation is carried out in the local horizontal coordinates, carrier positions, speeds and attitude parameters of each moment are obtained, variance-covariance arrays among the parameters are calculated; third, correction of the inertial navigation system through the visual system: by means of the Kalman filtering, navigation parameter errors and device errors of the inertial navigation system are estimated, and subjected to compensation and feedback correction, and therefore the optimal estimated values of all the parameters of the inertial navigation system are obtained; fourth, correction of the visual system through the inertial navigation system: all the parameters of the visual system are corrected through the sequential adjustment treatment. Compared to the prior art, the method has advantages of rigorous theories, stable performances, high efficiency and the like.
Owner:TONGJI UNIV
Method and apparatus for fast elliptic encryption with direct embedding
InactiveUS6307935B1Public key for secure communicationUser identity/authority verificationPlaintextEllipse
The present invention takes advantage of a quadratic-only ambiguity for x-coordinates in elliptic curve algebra as a means for encrypting plaintext directly onto elliptic curves. The encrypting of plaintext directly onto elliptic curves is referred to herein as "direct embedding". When performing direct embedding, actual plaintext is embedded as a "+" or "-" x-coordinate. The sender specifies using an extra bit whether + or - is used so that the receiver can decrypt appropriately. In operation their are two public initial x-coordinates such that two points P1+ and P1- lie respectively on two curves E+ and E-. A parcel of text xtext is selected that is no more than q bits in length. The curve (E+ or E-) that contains xtext is determined. A random number r is chosen and used to generate a coordinate xq using the public key of a receiving party. An elliptic add operation is used with the coordinate xq and the parcel of text to generated a message coordinate xm. A clue xc is generated using the random number and the point P from the appropriate curve E±. The sign that holds for xtext is determined and called g. The message coordinate xm, the clue xc, and the sign g are sent as a triple to the receiving party. The receiving party uses the clue xc and its private key to generate coordinate xq. Using the sign g and coordinate xq, the text can be recovered.
Owner:APPLE INC
Wheelchair having speed and direction control touchpad
InactiveUS6926106B2Easy to useRelieve pressureVehicle seatsElectric propulsion mountingWheelchairTouchpad
A wheelchair having a speed and direction control touchpad. The touchpad comprises two separated semi-conductive film layers, one measuring an X coordinate and one measuring a Y coordinate. When pressure is applied to the layers bringing them into contact with each other, an X, Y coordinate location is produced and the wheelchair is moved in a direction and speed analagous to the location of the pressure applied to the touchpad. A change in location of the pressure will result in a corresponding change in direction and speed. The touchpad also has a neutral or no movement activation point.
Owner:INVACARE CORP
Robot map establishing and storing method
ActiveCN104035444AImplement the buildImplement storagePosition/course control in two dimensionsComputer scienceX-Coordinate
The invention discloses a robot map establishing and storing method. The method comprises the steps that an electronic compass and a speedometer are used for achieving positioning and coordinate calculation of a robot combined with a GPS, before map data are established, the robot operates a circle around a working area along a boundary first, map boundary data are established, the mapping relation of the map data and the address of a storage unit is calculated, then the robot operates in the area, and then internal map data are established. The format of the map data is {X coordinate, Y coordinate and map grid attributes}, and in order to facilitate data storage, the data are mapped into storage space according to a certain rule.
Owner:SOUTHEAST UNIV
Linear Progression Based Window Management
ActiveUS20120242692A1Improve efficiencyIncreases expressivityCathode-ray tube indicatorsInput/output processes for data processingArray data structureSorted array
Some embodiments implement a linear switching application that provides functionality for switching between different windows based on an x-axis ordering of the windows instead of the z-axis or other ordering of prior art. The linear switching application identifies an array of currently open windows and sorts the array based on the leftmost x-coordinate position of the windows in the array. Optionally, the linear switching application modifies the GUI to display window identifiers based on the leftmost x-coordinate position of each window to orient the user to the x-coordinate position of each of the windows on-screen. The application determines an index in the current x-sorted array for the window that is currently frontmost and changes the frontmost window based on the current frontmost window and a directional input provided by the user.
Owner:INTELLITACT
Method and apparatus for detecting positions of center points of circular patterns
ActiveUS20050105827A1Free from adverse effect of noiseCharacter and pattern recognitionHough spaceComputer vision
Voting of coordinates of each pixel in a photographic image onto a Hough space corresponding to annuluses is performed, the Hough space being defined by a coordinate system having an X coordinate axis for a circle center point, a Y coordinate axis for a circle center point, and an r coordinate axis for a radial direction. A vote value of each voting position having coordinates (X, Y, r) on the Hough space is acquired as a first integrated vote value from a calculation of a number of votes given to each voting position. A position represented by (X, Y) coordinate values of a voting position associated with the largest first integrated vote value is detected as the position of the center point of the circular pattern.
Owner:FUJIFILM HLDG CORP +1
lighting device
ActiveCN102282416ASolve heating problemsPlanar light sourcesPoint-like light sourceOptical axisLight beam
Owner:NALUX CO LTD
Illuminating device
ActiveUS20110157898A1Reduce unevennessSolve heating problemsPlanar light sourcesPoint-like light sourceAngle of incidenceOptical axis
An illuminating device includes a light source (101) and an optical element including a light receiving surface (203), first and second light exit surfaces (205, 207). When the center of a light emitting surface (201) is designated as P1, a point at the edge of the light emitting surface is designated as P2 and an axis which passes through P1 and is perpendicular to the light emitting surface is designated as an optical axis, the optical element has a hollow around the optical axis with respect to the edge. In a cross section of the optical element, when a point on the first exit surface at which angle of view from P1 with respect to the optical axis is 15 degrees is designated as P3, an intersection of a ray which has been emitted at P2 and travels in parallel to the optical axis and the first light exit surface is designated as P4, and an axis connecting P1 and P2 is designated as x axis, the first light exit surface is formed in such a way that x coordinate of a point which is the most distant from the optical axis on the first light exit surface is 1.5 times or more than x coordinate of P2, that in 80% or more of an area in which x coordinate of a point is equal to or greater than x coordinate of P3, an angle of incidence of light emitted at P1 is equal to or greater than the critical angle and that in 80% or more of an area in which x coordinate of a point is equal to or smaller than x coordinate of P4, an angle of incidence of light emitted at P2 is smaller than the critical angle.
Owner:NALUX CO LTD
Hash functions using elliptic curve cryptography
InactiveUS20100166174A1Finite divisionUser identity/authority verificationDigital computer detailsComputer hardwareHash function
The hash functions using elliptic curve cryptography are hash functions that are produced using both an elliptic curve and a twist of the elliptic curve. Hash points are assigned values that either correspond to points on the elliptic curve or to points on the twist, depending upon whether the scalar value of the corresponding message block produces a quadratic residue or a quadratic non-residue when substituted as the x-value into the elliptic curve equation. The corresponding hash point x-coordinates are concatenated to form the hash bit string. The hash points may be doubled, and the hash functions may be applied to multimedia data by applying a media compression method to the message data before computing the hash points.
Owner:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
Sensor for microscopy
ActiveUS20120287256A1Efficient change of focus depthColor television detailsClosed circuit television systemsX-CoordinateMicroscopy
This invention pertains to a method for microscopically imaging a sample, with a digital scanner comprising a sensor including a 2D array of pixels and to a digital scanning microscope carrying out this method. It is notably provided a method for microscopically imaging a sample with a scanner comprising a sensor including a 2D array of pixels in an XY coordinate system, the axis Y being substantially perpendicular to the scan direction, wherein the scanner is arranged such that the sensor can image an oblique cross section of the sample, and wherein the method comprises the steps of: • activating a first sub-array of the 2D array of pixels, the first sub-array extending mainly along the Y axis at a first X coordinate (X1), • creating a first image by imaging a first area of the sample by means of the first sub-array of pixels. According to aspects of the invention, it is further proposed a scanner carryout this method and using the same 2D array sensor for imaging and auto-focusing purpose.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV
Method for XZ-elliptic curve cryptography
InactiveUS20050195973A1Saving in computational complexityQuick implementationKey distribution for secure communicationPublic key for secure communicationComputer hardwareCountermeasure
Given a set of elliptic curve points defined over a field F(p) and represented in projective coordinate, a method is presented which allows the embedding of data bits in both the X-coordinate and the Z-coordinate of the elliptic curve point when represented in projective coordinate. This makes the number of points that satisfy an elliptic curve equation and which can be used in the corresponding cryptosystem proportional to p2 rather than p. This can be used to either increase security by making the bit positions where data bits are embedded known only to the sender and receiver. Alternatively, it can be used to increase the number of data bits that can be encrypted per single elliptic curve point encryption. In another alternative, it can also be used to reduce p. Also, it can be used as a countermeasure by randomizing the bit positions where data bits are embedded. A similar formulation can be developed for elliptic curves over fields F(2m), as well as special elliptic curves such as Montgomery curves.
Owner:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
Calibration method for video and radiation imagers
InactiveUS20110024611A1Solid-state devicesMaterial analysis by optical meansHigh energyLeast squares
The relationship between the high energy radiation imager pixel (HERIP) coordinate and real-world x-coordinate is determined by a least square fit between the HERIP x-coordinate and the measured real-world x-coordinates of calibration markers that emit high energy radiation imager and reflect visible light. Upon calibration, a high energy radiation imager pixel position may be determined based on a real-world coordinate of a moving vehicle. Further, a scale parameter for said high energy radiation imager may be determined based on the real-world coordinate. The scale parameter depends on the y-coordinate of the moving vehicle as provided by a visible light camera. The high energy radiation imager may be employed to detect radiation from moving vehicles in multiple lanes, which correspondingly have different distances to the high energy radiation imager.
Owner:UT BATTELLE LLC
Elliptic curve random number generation
An elliptic curve random number generator avoids escrow keys by choosing a point Q on the elliptic curve as verifiably random. An arbitrary string is chosen and a hash of that string computed. The hash is then converted to a field element of the desired field, the field element regarded as the x-coordinate of a point Q on the elliptic curve and the x-coordinate is tested for validity on the desired elliptic curve. If valid, the x-coordinate is decompressed to the point Q, wherein the choice of which is the two points is also derived from the hash value. Intentional use of escrow keys can provide for back up functionality. The relationship between P and Q is used as an escrow key and stored by for a security domain. The administrator logs the output of the generator to reconstruct the random number with the escrow key.
Owner:MALIKIE INNOVATIONS LTD
Elliptic polynomial cryptography with multi x-coordinates embedding
InactiveUS7483533B2Increase the number ofData augmentationDigital data processing detailsPublic key for secure communicationComputation complexityCountermeasure
Given a set of elliptic points that satisfy an elliptic polynomial equation defined over a finite field F which requires N-bits to represent its elements, a method of cryptographic encryption and decryption is presented which uses more than one cubic variable that are termed x-coordinates to obtain an elliptic polynomial equation with multi x-coordinates instead of one x-coordinate. The additional nx x-coordinates are used to embed extra message data bits. A nx-fold increase in the number of embedded message data bits in a single elliptic point can be achieved with the improved method. The reason is that the number of points that satisfy an elliptic polynomial equation defined over F and which can be used in the corresponding cryptosystem is increased by a factor of (#F)nx, where # denotes the size of a field. The use of additional x-coordinates can be used to reduce computational complexity. Alternatively, this can be used to increase security by making the bit positions where data bits are embedded known only to the sender and receiver. Also, it can be used as a countermeasure by randomizing the bit positions where data bits are embedded.
Owner:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
Detector for optically detecting at least one object
InactiveUS20190157470A1Low effortLower requirementFinal product manufactureSolid-state devices3d sensingLight beam
A detector for determining a position of at least one object, in particular for 3D-sensing concepts, is disclosed. The detector comprises a longitudinal optical sensor (110) for determining a longitudinal position of an object by a light beam traveling from the object to the detector and a transversal optical detector (112) which may be designed as an imaging device or a position sensitive detector. The longitudinal sensor (110) has at least two PN structures or PIN structures (138, 140). Each of the PN structures or PIN structures is located between two electrode layers (144), thereby forming photodiodes (146) having a longitudinal sensor region (148) each. Longitudinal sensor signals from the photodiodes (146) are, given the same total power of illumination, are dependent on a beam cross-section of the light beam in the longitudinal sensor regions (148). As an alternative, instead of the transversal optical detector (112) the photodiodes (146) of the longitudinal optical sensor (110) may be adapted to operate as one-dimensional position sensitive detectors each, for determining a transversal x-coordinate and a transversal y-coordinate, respectively.
Owner:TRINAMIX GMBH
Comprehensive determination method for coefficient of roughness of rock mass structure surface
InactiveCN104613904ARoughness coefficient value is accurateThe measurement results are objectiveUsing optical meansMultiple formsClassical mechanics
The invention relates to a comprehensive determination method for a coefficient of the roughness of a rock mass structure surface. The comprehensive determination method is suitable for the comprehensive determination on the coefficient of the roughness of the multiple forms of rock mass structure surface. Topography data of the integral rock mass structure surface can be obtained at a time through a three-dimensional laser scanner or a rock mass structure surface topography instrument and accordingly the condition that the measurement result of one line segment cannot represent the roughness of the integral rock mass structure surface previously is changed and the measurement result is objective and real. A typical curve is straightened in the space, an X coordinate and a Y coordinate of every point are changed, a Z coordinate of every point remains unchanged, the representation is performed on the roughness of the three-dimensional rock mass structure surface by a two-dimensional method, the comprehensive analysis is performed by four calculation methods, and accordingly a finally determined coefficient value of the roughness of the rock mass structure surface is accurate. The comprehensive determination method is comprehensive in consideration, simple in calculation and accurate in result.
Owner:TAIYUAN UNIV OF TECH
Method of performing elliptic polynomial cryptography with elliptic polynomial hopping
InactiveUS20110200185A1Solve excessive overheadImprove securityPublic key for secure communicationSecret communicationComputer hardwareNumber generator
The method of performing elliptic polynomial cryptography with elliptic polynomial hopping allows for the encryption of messages through elliptic polynomial cryptography, i.e., using elliptic polynomials with multi x-coordinates, and particularly with the utilization of elliptic polynomial hopping based upon both the elliptic polynomial and its twist, regardless of whether the elliptic polynomial and its twist are isomorphic with respect to one another. Each plaintext block is encrypted by a different elliptic polynomial, and the elliptic polynomials used are selected by an initial secret key and a random number generator. The method is particularly useful for symmetric encryption systems, and provides a block cipher fundamentally based upon a computationally hard problem.
Owner:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
Digital signature generation apparatus, digital signature verification apparatus, and key generation apparatus
InactiveUS20080037776A1Public key for secure communicationUser identity/authority verificationDigital signatureTheoretical computer science
A digital signature generation apparatus includes memory to store finite field Fq and section D(ux(s, t), uy(s, t), s, t) as secret key, section being one of surfaces of three-dimensional manifold A(x, y, s, t) which is expressed by x-coordinate, y-coordinate, parameter s, and parameter t and is defined on finite field Fq, x-coordinate and y-coordinate of section being expressed by functions of parameter s and parameter t, calculates hash value of message m, generates hash value polynomial by embedding hash value in 1-variable polynomial h(t) defined on finite field Fq, and generates digital signature Ds(Ux(t), Uy(t), t) which is curve on section, the x-coordinate and y-coordinate of curve being expressed by functions of parameter t, by substituting hash value polynomial in parameter s of section.
Owner:KK TOSHIBA
Method for XZ-elliptic curve cryptography
InactiveUS7379546B2Saving in complexitySame level of securityKey distribution for secure communicationPublic key for secure communicationComputer hardwareCountermeasure
Given a set of elliptic curve points defined over a field F(p) and represented in projective coordinate, a method is presented which allows the embedding of data bits in both the X-coordinate and the Z-coordinate of the elliptic curve point when represented in projective coordinate. This makes the number of points that satisfy an elliptic curve equation and which can be used in the corresponding cryptosystem proportional to p2 rather than p. This can be used to either increase security by making the bit positions where data bits are embedded known only to the sender and receiver. Alternatively, it can be used to increase the number of data bits that can be encrypted per single elliptic curve point encryption. In another alternative, it can also be used to reduce p. Also, it can be used as a countermeasure by randomizing the bit positions where data bits are embedded. A similar formulation can be developed for elliptic curves over fields F(2m), as well as special elliptic curves such as Montgomery curves.
Owner:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
Robot 3D vision hand-eye calibration method
ActiveCN108818535AMeet the precision requirementsHigh precisionProgramme-controlled manipulatorImage analysis3d sensorSimulation
The invention discloses a robot 3D vision hand-eye calibration method. The method comprises the steps that S1, a posture, relative to robot base coordinates, of a robot flange and a posture, relativeto a 3D sensor coordinate system, of a calibration plate are obtained; S2, a rotation matrix, relative to a robot base coordinate system, of the 3D sensor coordinate system is calculated; S3, multiplecoordinate data of workpiece grasping points in the 3D sensor coordinate system and corresponding multiple coordinate data in the base coordinate system of a robot base are obtained; S4, transformational relations of X coordinate axes, Y coordinate axes and Z coordinate axes of the 3D sensor coordinate system and the robot base coordinate system are calculated. Compared with traditional hand-eyecalibration that only one transformational matrix is used for describing transform from the 3D sensor coordinate system to the robot base coordinate, by means of the robot 3D vision hand-eye calibration method, the transformational relations of positions and postures from a 3D sensor to the robot base coordinates are obtained respectively, compared with the prior art, the method is more flexible,the precision requirements in actual engineering application can be better met, and the hand-eye calibration precision is improved.
Owner:苏州汉振深目智能科技有限公司
Method of manipulator stacking system for glass
ActiveCN102491091ALittle external interferenceHigh precision of Y valueCharge manipulationStacking articlesProduction lineControl system
The invention relates to the technical field of glass production lines, in particular to a method of a manipulator stacking system for glass. A vision detecting system 1 is arranged on a support at the tail end of a conveying belt, acquires information such as the size, the position, the speed, the grade and the like of glass, and transmits the information to a management system 9 in real time; the management system 9 which is communicated with one-machine electric control systems 8 acquires working states and waiting states of the one-machine electric control systems, then distributed tasks according to states of various manipulators 2, and transmits glass distribution information to the one-machine electric control system 8 which receives the tasks; the one-machine electric control system 8 receiving the tasks controls a rib mechanism 6 thereof to ascend by the aid of the acquired information when the glass is conveyed to a grabbing area of the one-machine electric control system 8, an edge measuring device 5 operates to acquire a Y-direction coordinate value of glass after the glass is positioned, an X coordinate of the glass is acquired and the rib mechanism completes operation, and at the moment, position information of the glass is acquired completely. The manipulator stacking system can be used for grabbing a plurality of pieces of glass in various specifications.
Owner:CHINA TRIUMPH INT ENG
Data recording apparatus and method, data reproducing apparatus and method, data recording and reproducing apparatus and method, and map image data format
InactiveUS7184611B2Television system detailsNavigational calculation instrumentsLongitudeData recording
Latitudes and longitudes of first and second points on a measured map image are recorded together with an image file. First, a beginning of position information data of the map image is shown. Subsequently, it is shown that information of the first point is started. Subsequently, an X coordinate of the first point on the map image is shown. Subsequently, a Y coordinate of the first point on the map image is shown. Subsequently, the latitude of the first point is shown. Subsequently, the longitude of the first point is shown. Subsequently, it is shown that information of the second point is started. Subsequently, an X coordinate of the second point on the map image is shown. Subsequently, a Y coordinate of the second point on the map image is shown. Subsequently, the latitude of the second point is shown. Subsequently, the longitude of the second point is shown.
Owner:SONY CORP
Sensing Method And Related Device For Touch Panel
A sensing method for a touch panel is disclosed. The touch panel includes a plurality of sensing lines and a plurality of driving lines. The sensing method includes generating an electromagnetic signal or a capacitive signal; forming a plurality of first loops through the plurality of sensing lines to sense X coordinate of the electromagnetic signal on the touch panel and forming a plurality of second loops through the plurality of driving lines to sense Y coordinate of the electromagnetic signal on the touch panel when the electromagnetic signal is generated; sensing X coordinate of the capacitive signal through the plurality of sensing lines and sensing Y coordinate of the capacitive signal through the plurality of driving lines when the capacitive signal is generated.
Owner:NOVATEK MICROELECTRONICS CORP
Automatic test data positioning system and method for pavement condition
ActiveCN104120645ARealize three-dimensional positioningFully automatic intelligenceRoads maintainenceLongitudeRoad surface
The invention provides an automatic test data positioning system and method for a pavement condition. The method comprises the following steps of: acquiring longitude and latitude of each pile number position of each lane mileage pile by utilizing a longitude-latitude acquisition device to form a mileage-pile pile number-longitude and latitude electronic map database; controlling the acquisition of pavement fracture surface laser making line images and the longitude and latitude of the positions by utilizing a vehicle-mounted numerical value speedometer to automatically acquire vehicle track mileages and geodetic coordinate longitude and latitude of vehicle-mounted data points; performing longitude and latitude correlation on a certain vehicle-mounted data point position according to the longitude and latitude of the vehicle-mounted data points, the traveling track mileages and the mileage-pile pile number-longitude and latitude electronic map database which are synchronously acquired; determining a pile number position of the certain vehicle-mounted data point, namely a lane Y coordinate value; acquiring a horizontal coordinate zero point and an X coordinate value of the data through lane marking laser making lines and fracture surface laser making lines. The influence on non-linear lines and lateral oscillation of vehicle tracks during test is avoided, and the data of the position of lane marks can be strictly and certainly expressed.
Owner:TECH TRANSFER CENT CO LTD NANJING UNIV OF SCI & TECH
Cryptographic hash functions using elliptic polynomial cryptography
InactiveUS20100166175A1Readily apparentUser identity/authority verificationDigital computer detailsComputer hardwareCryptographic hash function
The cryptographic hash functions using of elliptic polynomial polynomials are based on the elliptic polynomial discrete logarithm problem, which is well known as a computationally hard problem. The hash functions are based on the elliptic polynomial equation in their generation, where different elliptic polynomials are used for different blocks of the same plain text. Particularly, the hash functions use an elliptic polynomial with more than one independent x-coordinate. More specifically, a set of elliptic polynomial points are used that satisfy an elliptic polynomial equation with more than one independent x-coordinate which is defined over a finite field F.
Owner:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
Method of determining the shape of a dental technology object and apparatus for per-forming the method
The invention relates to a method and an apparatus for a non-contact, three-dimensional determination of the shape of a dental technology object ( 10 ) whereby, to determine the space coordinates of the object's surface points to be measured, a thin stripe of light projected onto the object is measured by at least two matrix cameras ( 32, 34 ) to determine two space coordinates (Z- Y-coordinate) of a coordinate system, and the third space coordinate (X coordinate) is ascertained by determining the position of the object arranged on a measuring table ( 22 ) which is rotatable about an axis of rotation ( 20 ). In order to realize the non-contact determination of the shape of a dental technology object by a simple fashion, the matrix camera is a color matrix camera with first, second and third pixels, that the matrix camera captures light in a range of wave lengths characteristic for one type of the pixels (first pixels) and the values at least of one of the other types of the pixels (second and third pixels) are analyzed to determine the two first location coordinates (Y- and Z-coordinates).
Owner:DEGUDENT
Method for simultaneously realizing panorama remote-vision imaging and boring locus measurement
InactiveCN105335983AImprove reliabilityImage enhancementImage analysisData reliabilityBuilding construction
The invention provides a method for simultaneously realizing panorama remote-vision imaging and boring locus measurement. When a bore is actually detected, an elevation and horizontal coordinates in bore position parameters can be measured, including such information as a bore diameter, a bore depth and the like, in particular, some positions which do not accord with a predetermined drilling locus, occurring in detection of actual boring, for instance, a variable diameter position of the bore, positions including a direction deviation of the bore and the like are measured and recorded, accordingly, assistance of correct space coordinate information can be provided for a hole wall panorama picture of each position of the bore, and thus the picture splicing quality and the data reliability are improved; and detailed three-dimensional position coordinates of all exploration points and an accurate probe movement locus graph can be obtained, assistance is provided for work personnel in determining detailed positions of image interest points, and a detailed basis is provided for analyzing various structure constructions and mineral reserve distribution in the bore.
Owner:WUHAN UNIV
Video processing apparatus, imaging apparatus, video processing method, and storage medium
ActiveUS20120105702A1Increasing laborIncreasing timeTelevision system detailsGeometric image transformationComputer graphics (images)Video processing
A video processing method includes calculating mean values with respect to x coordinate value and y coordinate value of vertices that define a corresponding area, which is obtained when a designated area in spherical coordinates is projected on an xy coordinate plane that represents a captured image, and superimposing a mask image R on the captured image in such a way as to bring a point G having an x coordinate value and a y coordinate value identical to the calculated mean values with respect to the x coordinate value and the y coordinate value into coincidence with a point defined by a midpoint in the height direction and a midpoint in the width direction of the mask image.
Owner:CANON KK
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