396 results about "Position shift" patented technology

The invention discloses an industrial image anomaly detection method and device, equipment and a storage medium, and relates to the field of image recognition. Obtaining a defect-free product graph, making a comparison data set based on the defect-free product graph, and performing pre-storage processing; performing feature point shape matching on the comparison data set based on the received to-be-detected image and the extracted feature point data, and determining a comparison image of the to-be-detected image; taking the to-be-detected image as a target object, correcting a product image area in the image, and aligning the product image area with the product image area of the to-be-detected image according to a pixel shift operation; and comparing the aligned product image areas, and identifying abnormal defects in the to-be-detected image. According to the scheme, the comparison data set of the defect-free product image is constructed, the feature point matching and pixel-level alignment technologies are combined, the problem of false detection caused by product position deviation or form change in a traditional method is effectively solved, the adaptability to illumination change is improved through brightness adjustment and difference matrix analysis, and the detection accuracy is improved. The method has the advantages of high detection precision, high environmental adaptability and high processing efficiency.

Disclosed in the present application are a calibration apparatus, a calibration method, a positioning system, and a laser beam verification motif. The calibration apparatus comprises at least two optical path channels and at least two imaging assemblies, wherein each optical path channel runs through the calibration apparatus, and the optical path channel is used for rays to pass through; the two optical path channels intersect with each other, and the point of intersection of the two optical path channels is the central point of the calibration apparatus; each imaging assembly comprises two imaging surfaces, and the two imaging surfaces are arranged at two opposite ends of the same optical path channel; each imaging surface is provided with a marking portion, the marking portion is provided with a central marking point, and the central marking point is located in an extending direction of the optical path channel; and a connecting line of the central marking points of the two imaging surfaces in one imaging assembly runs through the central point of the calibration apparatus. The calibration apparatus of the present application is configured to acquire a pair of image information in a one-step imaging operation, so as to facilitate the comparison of the pair of image information, thereby adjusting the position offset of an imaging device.

The invention discloses a large-aperture off-axis telescopic system adopting a spherical adjusting structure and an adjusting method thereof, and belongs to the technical field of high-precision optical element supporting and adjusting mechanisms. Comprising a supporting frame, a primary mirror and a secondary mirror, the primary mirror and the secondary mirror are installed on the supporting frame, the primary mirror is installed on the supporting frame through a primary mirror positioning module, and the secondary mirror is installed on the supporting frame through a secondary mirror positioning module and a fine adjustment module; and the fine adjustment module can dynamically adjust the secondary mirror to realize six-degree-of-freedom adjustment of the secondary mirror. According to the invention, the problem of position offset generated when three position degrees of freedom and three angle degrees of freedom of the secondary mirror are adjusted in place and then assembled by using six-degree-of-freedom auxiliary adjustment equipment at present is solved, the adjustment process of the secondary mirror of the large-aperture off-axis telescopic system is simplified, and the adjustment efficiency is improved.

The invention relates to the technical field of vibration measurement, and particularly discloses a guide plate online dynamic amplitude anti-deviation laser monitoring device which comprises a fixing frame, a mounting groove is formed in the outer surface of the upper end of the fixing frame, a movable rod used for supporting a guide plate is fixedly connected to the inner side of the mounting groove, and a limiting assembly is arranged on the outer side of the movable rod. The limiting assembly comprises a notch formed in the outer surface of the guide plate, a limiting sleeve is fixedly connected to the outer surface of the movable rod, a pressing crack is formed in the outer surface of the limiting sleeve, and the limiting sleeve penetrates into the notch. By arranging the limiting assembly, when the position of the guide plate deviates, a limiting sleeve can play a role in correcting the deviation of the guide plate, so that the position of the guide plate is always in a proper position, and the influence of the position deviation of the guide plate on the measurement precision of the vibration amplitude of the guide plate can be reduced to a certain extent; and the monitoring error can be reduced to improve the monitoring precision.

The invention discloses an electrical pin position deviation detection method and system and electronic equipment, and belongs to the technical field of visual processing, and the method comprises the steps: determining a reference region and a reference point, and then determining a standard template used for aligning and matching an image through the reference region and the reference point in a standard workpiece; after a detection image is obtained, an alignment area is determined according to the corresponding position of a reference area in a reference template in the detection image, then the position of a first detection point is determined in the detection image by taking the alignment area as a reference according to the relative position relation between the reference area and a reference point, and the first detection point is a point aligned with the reference point in the detection image. The reference point is also a reference point for position offset judgment; image elements are determined, a second detection point is determined in the detection image based on the image elements, and the second detection point is a target point for position deviation judgment; whether the electrical pin has position offset is determined by determining whether the distance between the first detection point and the second detection point is beyond a distance threshold.

The invention provides a motion capture method and equipment of a rehabilitation robot. An IMU sensor in a passive glove can obtain sensor information such as a gyroscope, an accelerometer and a magnetometer in real time. The IMU sensors are placed on the palm and the fingertips of the five fingers of the passive glove, sensor data of all positions can be collected in real time, and the data are transmitted to the MCU to be processed. The MCU estimates the spatial attitude of each sensor through an algorithm and calculates the actual bending angle of each finger. According to the method, the posture data of each finger can be compared with the target rehabilitation action, feedback control is formed, the bending angle of the finger can be accurately captured, errors caused by sensor position deviation are effectively avoided, and higher posture estimation precision is achieved. The miniature IMU sensor is used, a flexible potentiometer or an external optical device is not needed, the environment interference resistance is high, use in a mobile scene is facilitated, and the requirements of the rehabilitation robot for comfort, portability and low cost are met.

The invention discloses a primary and secondary mirror combined detection system and method for a beam shrinking system, and belongs to the technical field of optical detection.The method comprises the steps that a first micro-spherical mirror and a second micro-spherical mirror are arranged, reflection light spots are captured through an interferometer, the position offset is calculated, and a first control instruction for adjusting the pose of a secondary mirror is generated; a dual-band light source is integrated in a detection light path, wavefront data and alignment monitoring data are collected, and temperature drift is corrected to obtain effective combined wavefront; an error separation model is constructed based on the primary mirror compensator parameter and the Zernike aberration coefficient, and a primary mirror surface shape error component and a secondary mirror offset error component are decoupled and separated by using a preset aberration coupling coefficient; feeding the error component back to a polishing process and a displacement table for closed-loop iterative correction until the RMS value and the PV value of the effective combined wavefront meet a preset imaging quality index; through precise positioning, error correction and decoupling separation, the precision and efficiency of primary and secondary mirror combination detection are improved, and targeted correction is realized.

The invention discloses a projector automatic focusing method based on a spectrum sensor and related equipment, and the method comprises the steps: carrying out the wavelength decomposition of a reflected light signal, and obtaining a light intensity value; calculating an initial distance value between the projector and the projection surface; carrying out integral operation on the acceleration data and the angular velocity data to obtain a position offset and an attitude angle offset; determining a compensation distance, and calculating an actual projection distance; controlling a stepping motor to drive a lens assembly to move to a focusing position corresponding to the target focal length value; controlling a stepping motor to drive a lens assembly to reciprocate; a new reflected light signal is collected again after each reciprocating motion; processing the new reflected light signal based on a preset mapping model to obtain a current measurement distance; and when the deviation value between the current measurement distance and the preset optimal imaging distance is smaller than a preset threshold value for the first time, determining the focusing position corresponding to the final measurement distance as a final focusing position. The automatic focusing precision of the projector is improved, and the definition of a projection picture is further improved.

The invention discloses a cutter state real-time monitoring and compensating method, system and equipment and a medium, and relates to numerical control precision machining. In the method, a cutting edge optical image, an acoustic emission signal time domain waveform, a vibration acceleration parameter and real-time temperature data of a cutting area of a cutter in the machining process are collected; measuring the maximum width and depth of a wear belt through an image to form a wear characteristic quantized value, and judging a wear over-limit state; judging the damage state based on the continuous ultralimit time of the instantaneous mutation rate of the acoustic emission signal; judging the abnormal vibration grade and state through vibration spectrum analysis; and inputting the vibration spectrum and the temperature data into a prediction model to obtain a position offset prediction quantity. And calculating a size deviation value according to a wear / damage state, calculating a coordinate offset according to vibration abnormity, generating a cutter geometric compensation instruction or a motion trail compensation instruction, and completing real-time compensation operation. According to the scheme, the fine abnormal change of the cutter in the machining process can be captured in time, and compensation is conducted according to the fine abnormal change.

The invention relates to the technical field of surface mounting, and discloses an SMT (Surface Mount Technology)-based patch vision correction method, which comprises the following steps: S1, a calibration stage: constructing a double-coordinate system mapping model based on a PCB (Printed Circuit Board) plane, and establishing a nonlinear distortion compensation matrix according to the patch thickness; s2, a pickup stage: a CCD shooting camera is arranged at the top of the suction nozzle, a top CCD is triggered to shoot when the suction nozzle picks up an element, and pin coplanarity data is extracted; s3, a positioning stage: setting a reference point at the top of the PCB, scanning the PCB reference point through a CCD, and calculating a deviation between an actual position and a theoretical coordinate by using an algorithm processor; and S4, compensation execution: the motion shaft system dynamically adjusts the mounting path according to the deviation vector. The visual correction method based on SMT pasting has the advantages of accurate pasting and the like, and solves the problems of pasting position offset, low efficiency and unstable precision caused by factors such as vibration of an element feeder, mechanical transmission errors and thermal deformation of a PCB (Printed Circuit Board) due to dependence on manual calibration in the existing SMT pasting process.

The invention discloses a motor insertion piece positioning detection method using optical recognition, and particularly relates to the technical field of motor manufacturing and detection. Collecting a high-resolution image containing the insert structure; carrying out image gray level enhancement and reflection interference suppression; extracting insert edge gradient information, and constructing an insert boundary point set; fitting the profile of the insert according to the boundary point set, and correcting the profile through a shape prior model; extracting barycentric coordinates and center positioning features of the inserts, calculating offsets delta X and delta Y and an angular deviation theta, and constructing a position offset vector V; the V is compared with a set tolerance model T, and whether the insertion piece is qualified or not is judged; an error distribution thermodynamic diagram is generated based on the offset data of the multiple punching sheets, and trend evaluation of the mold state and the material stability is achieved; according to the method, high-precision, full-automatic and visual detection of the sheet inserting position can be realized, and the sheet punching quality control level is improved.

The invention relates to an interferometer, in particular to a method for monitoring imaging position deviation of a Doppler differential interferometer, which is used for overcoming the defect of image surface drift of the Doppler differential interferometer caused by a thermal drift effect. According to the Doppler differential interferometer imaging position offset monitoring method, interference pattern signals are extracted and expanded, a groove distribution model D (x) and a scale signal distribution model I (x) are constructed, model parameters are optimized through multiple calibration interference patterns, and simulation scale signals are generated; and in actual measurement, the first pulse position a0 is optimized by minimizing an error between a simulation scale signal and an actually measured scale signal, so that accurate monitoring of the imaging position offset of the Doppler differential interferometer is realized.

The invention discloses automatic polishing equipment for optical lenses, and relates to the technical field of optical lens machining, the automatic polishing equipment comprises a supporting mechanism and a polishing stabilizing mechanism, the supporting mechanism comprises a base, a machining bin is fixedly connected to the top wall of the base, a polishing mechanism and an antifouling mechanism are arranged on the machining bin, and the polishing stabilizing mechanism is arranged above the polishing mechanism; and a liquid outlet nozzle is arranged on the polishing stabilizing mechanism. The optical lens mounting device has the advantages that the mounting stabilizing assembly and the locking assembly are matched, the optical lens is quickly mounted through circumferential clamping, further locking is carried out to ensure mounting stability of the optical lens, and machining errors caused by position deviation are prevented; through cooperation of the polishing stabilizing assembly and the locking assembly, a stable structure is formed, vibration generated in the swinging process can be effectively reduced, and the corrugation effect can be reduced; and through the cooperation of the antifouling mechanism and the liquid outlet nozzle, the liquid is prevented from being splashed to the adjacent optical lens, and new small scratches are prevented from being generated.

The invention relates to the technical field of semiconductors, in particular to a die bonder and a correction method thereof, a computer readable storage medium and packaging equipment. The device is applied to a die bonder, and the die bonder comprises a swing arm capable of rotating, a suction nozzle fixedly connected with the swing arm, a die bonding lens and a die taking lens which are located above the swing arm, and a downward-looking flying shooting lens located below the swing arm. When the swing arm rotates, the suction nozzle passes through the visual fields of the three camera lenses, and a calibration jig is arranged on the swing arm; the correction method of the die bonder comprises the following steps: driving a swing arm to swing, and respectively acquiring camera pixel ratios and camera coordinate calibration of three camera lenses based on a calibration jig; the center coordinate of the center point of the suction nozzle is obtained through the down-looking flying shooting lens, the crystal taking coordinate of the suction nozzle is obtained through the crystal taking lens, and the crystal fixing coordinate of the suction nozzle is obtained through the crystal fixing lens; and based on the center coordinate, the die bond coordinate, the die pick-up coordinate, the die bond pixel ratio and the camera pixel ratio, acquiring a die pick-up position offset and a die bond position offset. The position of the suction nozzle can be accurately obtained.

The invention discloses a method for measuring residual stress of a microstructure with a large slenderness ratio, which comprises the following steps of: etching a rectangular grating on the surface of a sample by adopting a focused ion beam technology, and synchronously marking an X-ray detection point; the integrated white light interferometer generates a curvature change curve in real time along a spiral track scanning path, and processes data by applying an empirical mode decomposition algorithm; a six-axis robot control system is used for compensating the position offset of the mark point, the incident angle of the X-ray is adjusted to adapt to the warping surface geometry, and multi-angle stress detection is carried out; establishing a mapping relation through grating-X-ray joint calibration, and generating a two-dimensional stress distribution diagram by using an interpolation algorithm; according to the grating curvature stability and the X-ray diffraction peak signal-to-noise ratio, the weight is dynamically distributed, a three-dimensional residual stress cloud picture is output, and a high-risk area is marked, so that the residual stress analysis capability of a material with a complex shape is effectively improved, more accurate and comprehensive stress distribution information is provided, and the potential material failure problem can be identified and prevented.

The invention relates to the technical field of optical systems, in particular to a light beam directivity deviation correction method and system. The method comprises the following steps: acquiring a light spot centroid position offset signal of a light source beam in the camera unit; according to the light spot centroid position offset signal, decoupling control is carried out through a target coupling matrix, and a driving voltage value of the fast steering mirror unit is obtained; the target coupling matrix is used for indicating a coupling coefficient relationship between the displacement change of the fast reflecting mirror unit and the position change of light spots in the camera unit; and based on the driving voltage value, controlling each fast reflecting mirror in the fast reflecting mirror unit to rotate around the respective axis so as to correct the directivity deviation of the light beam of the light source. According to the invention, by introducing the target coupling matrix, the coupling relation of light spot centroid change in the camera caused by angle change of the reflector in the horizontal and pitching directions is successfully eliminated, the problem that the other kind of error rises when a certain kind of error is adjusted is avoided, and accurate control is realized.

The invention relates to the technical field of laser centering, in particular to a centering device special for laser cutting light beams and a using method. And in combination with vision and a special adjusting device, coaxial adjustment of a laser beam and the center of the nozzle can be rapidly completed through a self-adaptive algorithm, the intelligent level of the laser cutting machine is improved, and an important link of laser cutting full-automatic machining is complemented. The centering device comprises a motor module connected with the laser cutting head, an imaging device, a visual acquisition device and a control unit; according to the method, a visual collection device and an imaging device are matched to collect the center position of a nozzle and the center position of red light of a laser, the center position is converted into the movement distance of a motor module in a centering device in real time through a self-adaptive algorithm, and position offset is conducted on a focusing lens in a laser cutting head; by calculating the position deviation value of the nozzle center and the red light center of the laser, centering is ensured to meet the requirement, so that coaxial adjustment of the laser beam and the nozzle center is realized.

The invention discloses a laser marking device and method, and belongs to the technical field of laser marking, the laser marking device comprises a base, and the base is provided with an alternate lifting assembly which alternately drives a carrying disc on one side to descend by the thickness of one layer of plate and simultaneously drives a carrying disc on the other side to ascend by the thickness of one layer of plate; an adjusting type marking assembly used for adjusting the position of the laser marking gun front and back and adjusting the position of the laser marking gun left and right is installed at the upper end of the base. The base is provided with a carrying assembly used for sucking the marked plates from the carrying disc on one side of the alternate lifting assembly and moving and stacking the plates to the carrying disc on the other side of the alternate lifting assembly. By means of the mode, the automatic taking and stacking process of the plates can be achieved, due to cooperation of the alternate lifting assembly and the carrying assembly, the falling height of the plates in the stacking and falling process can be basically consistent and low, the factors such as resistance can be basically ignored, position deviation of the plates is avoided, and the working efficiency is improved. And the tidiness and stability of plate stacking can be guaranteed, and the subsequent machining process is prevented from being affected.

The invention provides a camera-based AI visual recognition and prediction control method and related equipment, and the method comprises the steps: obtaining continuous image frames of a moving object, and recognizing the skeleton key point coordinates and appearance feature information of the moving object; inputting the skeleton key point coordinates and the appearance feature information into a preset time sequence neural network model to obtain a motion prediction track; performing space mapping on the centroid coordinates of the moving object according to the motion prediction trajectory, and determining focal length control parameters of the camera; meanwhile, angle mapping is carried out on the position offset of the moving object, and pan-tilt control parameters are determined; and tracking and shooting the moving object according to the focal length control parameter and the holder control parameter. Through the mode, the camera can complete the pre-adjustment of the focusing mechanism and the composition direction before the target motion trend occurs, thereby effectively reducing the delay error in the focal length switching process, and improving the clear imaging rate and composition stability of a high-speed motion main body.

To provide a data processing method for an eddy current flaw detection system capable of accurately evaluating changes in slit signal intensity even when a scan starting position in each time deviates in a case of probe-scanning a magnetic material multiple times.SOLUTION: A multi-coil type probe 51 is placed on an inspection object 1 made of a magnetic material having a slit 4, and a portion including the slit is scanned by the probe to acquire an initial waveform and an evaluation waveform multiple times. A movement amount of the evaluation waveform in a case where the evaluation waveform is moved toward the initial waveform is calculated so that the deviation between the initial waveform and the evaluation waveform becomes minimal. A correction value for the evaluation waveform is calculated on the basis of position information of each channel in the probe and the movement amount of the evaluation waveform. A new evaluation waveform is generated by moving the evaluation waveform in accordance with the correction value. A difference in peak values between the initial waveform and the new evaluation waveform is calculated.SELECTED DRAWING: Figure 8

The invention relates to the technical field of mechanical engineering and intelligent control, and particularly discloses a dynamic leveling method and system for a damping profiling icebreaking snow remover. The method comprises the steps that high-strength alloy impact toughness parameters and staggered rolling path parameters are collected, an icebreaking wheel set rigidity matching matrix is generated through optimization, and adjustable rigidity assignment is completed; acquiring road surface fluctuation data within a profiling distance based on a laser ranging device, and fusing multispectral and millimeter wave radar data to generate a three-dimensional dynamic terrain map; inputting the rigidity matching matrix and the dynamic terrain map into an LSTM mechanical simulation engine, calculating five-wheel-set dynamic pressure distribution and outputting real-time wheel set pressure parameters; the real-time pressure parameter is compared with the measured value of the sensor, and an oil cylinder stroke compensation instruction is generated to drive hydraulic leveling control; analyzing the three-dimensional position offset of the snow shovel and the ice breaking wheel, converting the three-dimensional position offset into a side row inclination angle parameter, and generating a multi-shaft torque cooperative control instruction; and generating a material wear characteristic spectrum through federal learning training, and dynamically correcting a path inclination angle and a rigidity compensation parameter. The ice breaking and snow removing device has the beneficial effects of improving ice breaking and snow removing efficiency, enhancing equipment stability and reducing material abrasion.

The invention discloses a multi-view vision hole site measuring method and device for a structural part, and relates to the technical field of multi-view vision. In order to solve the technical problems that an existing hole site detection method is insufficient in detection precision, low in detection efficiency, incapable of achieving comprehensive detection and unstable, the technical scheme provided by the invention includes that the multi-view vision hole site measurement method for the structural component comprises the following steps: loading a feature template image of a workpiece hole site, calculating similarity by using an image gradient field, and positioning the central position of a hole site from the workpiece image; a step of calibrating the position offset of the camera by using the correction target; according to the camera position, the light source condition and the image data of the hole site, the accurate coordinate position of the hole site of the workpiece in the three-dimensional space is calculated through a three-dimensional reconstruction method; and converting the three-dimensional coordinate data in the equipment coordinate system into a workpiece coordinate system. The method is suitable for being applied to the work of multi-view vision hole site measurement of the structural member.

The invention is applied to the technical field of flatness detection, and discloses a flatness detection mechanism which comprises a workbench, a switching linear module is fixedly arranged on the upper surface of the workbench, a switching seat is mounted on the surface of the switching linear module, and a laser detector is fixedly mounted at the upper end of the switching seat. And a feeding mechanism is arranged on the upper surface of the workbench, and efficient detection of the flatness of the surface of the material through a laser detector is achieved by positioning and conveying the material. According to the flatness detection mechanism, the combination of the feeding linear module and the feeding seat is matched with the guiding of the limiting plate to the plate, so that the bearing plate and the plate placed on the bearing plate can be accurately conveyed to a designated position, the problem of plate position deviation in the traditional feeding process is solved, the plate can accurately enter a detection area of a laser detector, and the detection efficiency is improved. It is guaranteed that the laser detector can comprehensively and accurately scan the surface of the plate according to the preset path, and the high-precision advantage of laser detection is brought into full play.

The invention belongs to the field of additive manufacturing, and relates to a flight printing position compensation method which comprises the following steps: 1) judging whether a to-be-processed point has position offset during flight printing or not, and if so, performing a step 2); if not, exiting; and 2) performing position offset compensation on the galvanometer according to the movement speed of the moving device. The invention provides the flight printing position compensation method capable of effectively avoiding position deviation of the processing point and improving the printing precision at the same time.

The invention discloses a camera movement detection and grabbing coordinate compensation method, and belongs to the technical field of automatic control and vision. The method does not depend on fixed calibration parameters, so that the purposes of obviously improving the positioning precision and the one-time grabbing success rate are achieved by accurately detecting the change of the position of the camera and mapping the related displacement to an actual grabbing coordinate system for compensation. A visual system is adopted to realize detection and accurate positioning of movement of a camera bound on a movable clamping jaw through a fixed calibration plate and an image algorithm processing mode; the visual system comprises a mechanical arm with six-axis degrees of freedom, a camera, a calibration plate and an industrial personal computer; comprising the following execution steps: step 1) installing a calibration plate; step 2) hand-eye calibration; 3) teaching and reference coordinate recording; 4) detecting the position of the camera; (5) camera position deviation judgment is carried out; and (6) the coordinates of the grabbing points are compensated when the materials are grabbed.

The present invention discloses an alignment device, calibration and alignment method for display panel detection equipment, comprising S1: calibrating the installation position of a first camera and the origin position of a second camera; S2: calculating the position offset of a moving platform relative to the second camera when the rotating table is in an initial position according to the offset of one of the reference holes on the detection fixture observed by the first camera relative to the center of the field of view of the first camera before and after the rotating table rotates; S3: calculating the angle between the X-axis direction of the rotating table and the X-axis direction of the device coordinate system according to the offset of one of the reference holes on the detection fixture observed by the first camera relative to the center of the field of view of the first camera before and after the rotating table moves along the X-axis; S4: calculating the posture of the detection fixture relative to the rotating table when the rotating table is in the initial position according to the offset of two reference holes observed by the first camera relative to the center of the field of view of the first camera; the calibration method improves the alignment accuracy.

The invention provides a moving ship detection method based on spatial-temporal characteristics, which comprises the following steps: firstly, eliminating land and thick cloud regions through dual-threshold segmentation preprocessing, and adaptively extracting weak ship candidate targets in a water area by combining top-hat transform with sequential statistical filtering; combining detection results of each wave band, expanding the area of a ship candidate target, realizing signal enhancement and eliminating static false alarms, combining multiple frames of candidate targets, and carrying out filtering processing by utilizing a multi-direction rotation linear kernel by utilizing position offset characteristics of a moving target in five wave bands of a Gaofen-4 satellite due to imaging time difference; according to the method, real ships in smooth track distribution are reserved, isolated and randomly distributed false alarms or non-coherent track false alarms are eliminated, and stable and high-precision ship detection is effectively guaranteed while the low false alarm rate is kept.

The invention discloses an automatic rapid fire point position correction method based on image frequency domain information, and belongs to the field of image processing. According to the method, GSHHG coastline and inland water body data provided by NOAA are taken as geometric reference data, and geometric correction is carried out on the position offset of a fire point by utilizing frequency domain information of a specific wave band of Himawari image data. Firstly, after screening of available control points is completed, the POC algorithm is used for calculating the offset of windows around the control points. Based on the distance, three control points are selected, the average value of the offset of the three control points serves as the offset of the pixel to be corrected, and the position of the fire point pixel is corrected. According to the method, the geometric position deviation problem of the Himawari-8 / 9 image is corrected, and the fire point position deviation problem is effectively relieved. According to the invention, the precision of fire point detection in southwest China is effectively improved.

The invention relates to the technical field of dental image shooting, and discloses a label-based intelligent positioning method and device, a positioner and a ray machine, and the method comprises the steps: collecting response signals of a plurality of induction labels of an imaging sensor aiming at a signal transmitted by a label positioner arranged on the ray machine, and receiving signal intensity and carrier phase information; the method comprises the following steps: estimating an estimated distance for any induction tag by fusing a linear relationship between an attenuation model of received signal strength and a carrier phase, and eliminating a single tag error by utilizing multi-point sampling in combination with the estimated distance and position information of all the induction tags and a position offset generated by a positioning imaging sensor relative to a ray machine, so as to realize submillimeter-level accurate positioning. The alignment accuracy and efficiency of the two are improved, so that the position is accurate when the dental X image is shot, and the imaging sensor is ensured to completely fall into the range of the projection area; the device is flexible in installation, low in cost, small in angle dependence, and suitable for low-power-consumption scenes where the size of the sensor in the oral cavity is limited and no independent power supply exists.