35results about How to "Improve the speed of correction" patented technology

The invention discloses a digital image correction method for a continuous variable-focal-length optical imaging system. The digital image correction method comprises the steps of acquiring planar template images which are photographed by an image camera in a plurality of discrete focal lengths, performing off-line calibration on a distortion parameter which corresponds with each focal length of a variable-focal-length lens; performing curve fitting on the distortion parameter which corresponds with each focal length for obtaining a fitting formula or establishing a distortion parameter lookup table; according to the actual operation focal length of the image camera, obtaining a lens distortion parameter which corresponds with the actual operation focal length through the distortion parameter lookup table or calculation by the fitting formula; and constructing a projection conversion relationship from an image camera coordinate system to a map coordinate system according to position gesture data and the lens distortion parameter in imaging of the image camera, and performing resampling on the pixel brightness value after coordinate conversion for obtaining an orthographic projection image after correction on the squint deformation and lens distortion. The digital image correction method realizes a purpose of simultaneous correction for squint trapezoidal distortion and variable-focal-length nonlinear distortion in the variable-focal-length imaging system.

The invention discloses a sea-surface ship object detecting and extracting method of an optical remote sensing image, and aims at reducing the false alarm rate effectively, extracting ship objects of different sizes rapidly and accurately, obtaining amount and position information of the objects, and being low in computing complexity. Multi-vision significance is detected on the basis of a frequency-domain model, a hyper complex frequency domain transformation model and a quaternion Fourier transform phase spectral module are fused in a weighted manner to overcome disadvantages of the two models and enhance advantages of the two models, and further sea-surface background interface is inhibited, the integral continuity of detected objects and differentiation performance among the objects are enhanced, and the target area of the sea surface is searched effectively. False alarm against possible heavy cloud layers and islands in the images is reduced, an improved histogram in the gradient direction is used to represent the distribution feature of the gradient structure of the object, the detected objects are discriminated according to established rules and conditions, whether a detected object is a ship is determined, the false alarm rate is reduced greatly, and the detecting accuracy is improved.

The invention discloses an error correction method of a flying probe tester. The method comprises the steps that the center of a cross target of a camera image is pointed to the center o of one test point of a PCB board to be calibrated; a probe is controlled to detect the PCB board to acquire a probe test point t; the probe test point t is taken as an initial point, and the probe is controlled to search an edge point a1 and an edge point a2 on both sides along X or Y direction; according to two detected edge points in X or Y direction, a center point a3 in X or Y direction is searched; the center point in X or Y direction is searched in the same manner, and the center point is the center o of the test point of the PCB board to be calibrated; the deviation between the probe initial point t and the center o of the test point is the actual offset of the probe to the camera center; and after a control system compensates the actual offset, a test is carried out. According to the error correction method, the actual offset of the probe to the camera center can be determined before the flying probe tester is used, and the test accuracy of the flying probe tester is ensured.

The invention discloses a digital correcting method with an overflow marker position of a production line A / D (analog to digital) converter. The method comprises the following steps: (1) applying dither signals on each correction level in the production line A / D converter; (2) carrying out A / D conversion on each production line sub level, and generating and outputting signals and binary codes; (3) treating the output signals of each correction level to obtain correction parameters; and (4) carrying out coding rebuilding on the binary codes according to the correction parameters to obtain the A / D digital codes with two overflow marker positions. Simultaneously the invention also discloses the production line A / D converter for the method. The production line A / D converter comprises a plurality of overflow sub levels and a Flash A / D converter. According to the invention, through expanding the allowed input range of the production line sub levels and applying dither signals with a greatervalue of amplitude, errors caused by threshold voltage misalignment, capacitance mismatch and the operation of limited open-loop gains can be corrected, the correction time is short, the correction accuracy is high, and the positive overflow and negative overflow can be marked respectively.

The invention relates to a crystal grain angle correction method applied to a chip separating system, which mainly comprises the following steps: judging a deflection angle of target crystal grains; driving a swinging arm of a crystal grain conveying mechanism to rotate 90 degrees minus alpha when the deflection angle alpha of the target crystal grains is a positive number, simultaneously executing the difference-alpha deflection angle position compensation on an arrangement region, and placing the target crystal grains into the arrangement region; driving the swinging arm of the crystal grain conveying mechanism to rotate 90 degrees plus alpha when the deflection angle alpha of the target crystal grains is a negative number, simultaneously executing the multi-alpha deflection angle position compensation on the arrangement region, and placing the target crystal grains into the arrangement region; and driving the swinging arm of the crystal grain conveying mechanism to rotate 90 degrees when the deflection angle alpha of the target crystal grains is zero, and directly placing the target crystal grains into the arrangement region. The invention combines the rotation movement of the crystal grain conveying mechanism and the translational movement of the arrangement region for compensating the angle deflection of the crystal grains, carries out parallel dispatch between the position compensation of a material supply region and the arrangement region, and realizes the automatic correction of the crystal grain angle under the condition of not reducing the conveying speed.

The invention discloses an image real-time correction output method for a broad-width scanner. The method includes the following steps: (1) a PC host sends a scanning instruction to an FPGA main control chip; (2) the FPGA main control chip controls N linear CCD image sensors to light on at the same time and controls a CCD transmission module to control the N linear CCD sensors to acquire images synchronously and at the same time, an algorithm module in the FPGA main control chip calculates two correction parameters Alpha and Beta respectively; (3) the linear CCD sensors acquire image data and transmit the image data to analog-to-digital converters and the analog-to-digital converters convert analog signals into digital signals and transmit the digital signals to the algorithm module in the FPGA main control chip to carry out processing; (4) the algorithm module calculates gray level values corrected by all photosensitive units; (5) the FPGA main control chip transmits the gray level values corrected by the photosensitive units to the PC host for processing so as to display images. The image real-time correction output method for the broad-width scanner is reasonable in design, high in processing speed and high in imaging precision.

The invention discloses a correction processing method and a correction processing device. The method comprises the following steps: performing data preprocessing on a forward signal and a feedback signal which are acquired, wherein the feedback signal is a signal obtained by correcting the forward signal; getting correction information according to the signals after data preprocessing, and updating correction parameters according to the correction information; and correcting the forward signal based on the updated correction parameters. Through the method and the device, the problem that the pre-distortion tracking effect is poor due to real-time change of service in the related technologies is solved, and the correction speed and correction performance for nonlinear system distortion are improved.

The invention relates to a correcting mechanism for a T-shaped steel panel of a bridge, which comprises two stressed brackets on both sides. A large guide shaft and a small guide shaft are installed on the two stressed brackets. The large guide shaft is provided with a driving wheel through a bearing component. The driving wheel drives rotation through a driving mechanism. Two axially movable supports are installed on the large and small guide shafts. A correcting wheel assembly is installed on each support. The correcting wheel assembly is used to be matched with the driving wheel so as to automatically correct angular deformation of the T-shaped steel panel during assemblage and welding of the T-shaped steel panel. The correcting mechanism provided by the invention has a simple, compact and reasonable structure so that the T-shaped steel panel is automatically corrected so as to realize automated operation, and therefore the labor intensity of workers is reduced, the correcting speed of the T-shaped steel panel is improved and the production efficiency is effectively improved.

The embodiment of the invention provides an answer sheet identification method and device, electronic equipment and a readable storage medium. The method comprises the following steps: acquiring a to-be-identified image, wherein the to-be-identified image is an image containing an answer sheet; and identifying the to-be-identified image to obtain an option identification result corresponding to the answer sheet. According to the answer sheet identification method provided by the embodiment of the invention, the to-be-identified image containing the answer sheet can be identified so as to obtain the option identification result corresponding to the answer sheet.

The invention discloses a correction mechanism and method for a rubber ring annular hole. The correction mechanism comprises a positioning air cylinder, a stepping motor, a positioning pressing disc,a die, a supporting seat and a correlation type photoelectric switch. The positioning air cylinder is fixed to the upper end of the supporting seat, a lifting plate is connected to a piston rod of thepositioning air cylinder, the stepping motor is arranged at the upper end of the lifting plate, and the positioning pressing disc connected with an output shaft of the stepping motor is arranged on the lower part of the lifting plate. The die is arranged below the positioning pressing disc, a mounting groove for mounting a rubber ring is formed in the upper end of the die, and a die annular holecorresponding to the rubber ring annular hole is formed in the mounting groove. The correlation type photoelectric switch comprises an emitter and a receiver, the emitter and the receiver are correspondingly located on the two sides of the die, and light between the emitter and the receiver penetrates through the die annular hole. Optical fiber detection is adopted, a detection result is accurate,the problem that the rubber ring annular hole and the die annular hole are difficult to align is solved, automatic alignment of hole sites is achieved, and the requirement for automatic bead installation is met.

An asymmetric error correction apparatus and method, and clock recovering apparatus and data recovering apparatus for a system for reading data from an optical recording medium such as a CD or DVD that has a multi-level input signal and irregular characteristic of zero-crossing transition. The signal inputted from the optical recording medium is digitized, and a zero-crossing detector extracts four sequential samples and detects a zero-crossing point from the two intermediate samples. An asymmetric error detector judges an asymmetric state and asymmetric polarity of the digital signal from a sum of the two side samples among the four samples if the zero-crossing point is detected. A correction section accumulates the judged asymmetric polarities, judges an asymmetric error of the digital signal if the accumulated value exceeds a predetermined threshold, and corrects the asymmetric error of the read signal caused by an inaccurate pit length.

The invention relates to a plane resolution correcting method and device for video optical system, comprising a correction sample and a video sensing device, where the correction sample surface has open wire-buried wire alternating straight line stripes, and the correction sample is arranged at a to-be-measued plane, the video sensing device has video pickup means, memory means and logic calculation means. By picking up correction sample video information and storing the video information and simultaneously selecting and solving straight line equation of open- wire stripes, by straight line slope and intercept of the straight line equation, and by calculating average distance between adjacent open wires through the intercept, finally calculating the multiplication of the video sensing device picked-up video by geometrical means.

The invention discloses a method for detecting and extracting a ship target on the sea surface of an optical remote sensing image. The invention can effectively reduce the false alarm rate, quickly and accurately extract ship targets of different sizes, obtain their quantity and position information, and have low computational complexity. The present invention detects based on the frequency-domain model combined with multi-visual saliency, weights and fuses the ultra-complex frequency-domain transformation model and the quaternion Fourier transform phase spectrum method model to correct their respective deficiencies and enhance the advantages of the two, thereby suppressing the sea surface The background interference enhances the overall continuity of the detected target and the distinguishability between targets, and efficiently searches for the target area on the sea surface. For false alarms such as thick clouds and islands that may appear in the image, use the improved gradient direction histogram method to characterize the gradient structure distribution characteristics of the target, identify the detected target according to the established rules and conditions, and judge whether the detected target is For ships, the false alarm rate is greatly reduced and the detection accuracy is improved.

The invention relates to the technical field of bridge detection, and discloses a bridge displacement detection device and method, and the device comprises a telescopic plate, one side of the telescopic plate is provided with a measuring structure, and the measuring structure comprises a measuring block, an indicating block, a moving groove, a dial gauge, a pointer, a moving block, a connecting block, a rolling block, a joining block, a bottom plate, a sliding block, and a lead screw. When a rotating force is applied to the lead screw, the lead screw can control the sliding block to horizontally and longitudinally move along the open groove, and when the sliding block moves, the rolling block is stressed and then controls the moving block to horizontally and longitudinally move along the moving groove. The measuring structure measures the distance between the bridge pier and one side of the bridge by taking the bridge pier as the midpoint through the screw rod and the measuring block, then the screw rod is rotated to control the measuring block to move to increase the detection distance, so that the measuring result is more accurate, and the offset distance is obtained through the data of the pointer on the scale marks.

The invention relates to a crystal grain angle correction method applied to a chip separating system, which mainly comprises the following steps: judging a deflection angle of target crystal grains; driving a swinging arm of a crystal grain conveying mechanism to rotate 90 degrees minus alpha when the deflection angle alpha of the target crystal grains is a positive number, simultaneously executing the difference-alpha deflection angle position compensation on an arrangement region, and placing the target crystal grains into the arrangement region; driving the swinging arm of the crystal grain conveying mechanism to rotate 90 degrees plus alpha when the deflection angle alpha of the target crystal grains is a negative number, simultaneously executing the multi-alpha deflection angle position compensation on the arrangement region, and placing the target crystal grains into the arrangement region; and driving the swinging arm of the crystal grain conveying mechanism to rotate 90 degrees when the deflection angle alpha of the target crystal grains is zero, and directly placing the target crystal grains into the arrangement region. The invention combines the rotation movement of the crystal grain conveying mechanism and the translational movement of the arrangement region for compensating the angle deflection of the crystal grains, carries out parallel dispatch between the position compensation of a material supply region and the arrangement region, and realizes the automatic correction of the crystal grain angle under the condition of not reducing the conveying speed.

The invention discloses a circuit for calibrating operational amplifier imbalance in a successive approximation register mode. The circuit comprises an operational amplifier module, a comparer module, a control logic unit, a four-digit successive approximation register and a four-digit DAC module. The in-phase end of the comparer module is connected with an output voltage of the operational amplifier module. The inverted phase end of the comparer module is connected with VDD / 2. The output end of the comparer module is connected with the logic control unit. The output end of the logic control unit is connected with the four-digit successive approximation register. Four output ports of the four-digit successive approximation register are connected with four input ends of the four-digit DAC module. The voltage output end of the four-digit DAC module is connected with the operational amplifier module. The imbalance is calibrated in the successive approximation register (SAR) mode, a calibration process can be finished only through clock periods of which number is the same to the number of calibration digits, and the calibration speed is improved.

The invention discloses a phase gradient autofocus motion compensation method based on SAR image search and solves the problems that in the prior art, the entropy convergence speed is low, the focusing effect of an image with few isolated and strongly-scattering points is poor and even the focusing is in failure. The method includes (1) inputting image domain data signal matrix; (2) acquiring distance unit data signal matrix; (3) shifting in a circular manner; (4) windowing; (5) correcting phase errors; (6) judging whether the entropy convergence conditions are met or not; (7) outputting phase correction data signal matrix. Compared with the prior art, the speed of the entropy convergence is increased, the phase error correcting efficiency is improved, and the focusing effect of the image with few isolated and strongly-scattering points is fine.

The invention discloses equipment special for detecting and correcting a tracking rod of a total station. The equipment comprises a correcting device, a detecting and positioning device and a calibrating device, a correction shell is fixedly installed on a positioning bearing plate, a calibration upper main board is fixedly installed on a positioning left transmission shaft, and rotation of a correction left side straight tooth is transmitted to a correction right side straight tooth; after the correction left side fixing disc is fastened through the correction right side fixing disc sliding on the correction sliding rod, the total station head on the total station is corrected; then, a positioning motor operates and rotates to be transmitted to a positioning right side straight tooth, and a positioning left linkage plate drives a correction device on a positioning bearing plate to perform detection and positioning work; According to the invention, the operation cost can be reduced, the total station equipment can be detected and corrected when leaving a factory or being maintained, and the qualified rate of the equipment and the customer experience are improved.

The invention discloses a color temperature curve correction method, system and device and a medium. The method comprises the steps of obtaining a preset color temperature curve of a display device; any gray scale interval is selected, and optical data of a display image corresponding to the end value of the gray scale interval is acquired; and in the gray scale interval, selecting a gray scale which corresponds to a display image and meets an image display standard, acquiring optical data corresponding to the gray scale display image, and inserting a color temperature value corresponding to the gray scale into a preset color temperature curve to correct the color temperature curve. The method comprises the following steps: segmenting a gray scale, respectively inserting one or more points in each segmented interval, and correcting a color temperature curve by adopting a point complementing mode; in the correction process, a linear interpolation mode is adopted for the RGB points, so that each input value has a single adjustment value, a test signal can be adjusted to the maximum extent, and a standard picture is obtained.

Embodiments of the present disclosure provide an answer card identification method, device, electronic equipment, and a readable storage medium. The method includes: acquiring an image to be recognized, the image to be recognized is an image containing an answer sheet; identifying the image to be recognized, and obtaining an option recognition result corresponding to the answer sheet. The answer sheet recognition method provided by the embodiments of the present disclosure can recognize an image to be recognized including the answer sheet to obtain an option recognition result corresponding to the answer sheet.

The invention discloses a low-offset operational amplifier based on regulation on active load, which comprises an operational amplifier module, a comparator module, a logic controlling unit and a four-site successive approaching register. The in-phase input end of the comparator module is connected with the detection voltage Vdec of the operational amplifier module, the antiphase input end of the comparator module is connected with VDD / 2, and the input end of the logic controlling unit is connected with the output end of the comparator module; the four-site successive approaching register is connected with the output end of the logic controlling unit and has four ports of a0, a1, a2 and a3 which are used for adjusting the number of transistors in in series connection with one side of the active load. According to the low-offset operational amplifier of the invention, the detection is added into the design, the uncertain jumping change of level at the output end to influence the use of a user when correcting the offset can be avoided.

The invention relates to a plane resolution correction method and device of an image optical system, comprising a correction sample and an image sensing device, the surface of the correction sample has straight lines alternated with bright lines and dark lines, and the correction sample is set on a plane to be measured Here, an image sensing device has image capturing means, memory means and logic calculation means. In order to execute the image information of the calibration sample and store the image information, select and calculate the straight line equation of the bright line stripes, through the straight line slope and intercept of the straight line equation, and use the intercept to calculate the average distance between adjacent bright lines, and finally use geometric mathematics The method calculates the magnification of the image captured by the image sensing device.

The invention discloses a method for eliminating drifting of a Raman baseline in a Raman spectrum. The method comprises the following steps: step I: smoothening an original Raman spectrum, solving a Raman peak after the smoothening according to a middle value greater than values on two sides, solving a valley after the smoothening according to the middle value smaller than values on two sides, andobtaining a smoothened Raman spectrum; step II: performing the sliding-window linear fitting for a smoothened Raman area, and obtaining a fit Raman baseline; step III: eliminating a fluorescent packet in the fit Raman baseline; and step IV: subtracting the Raman baseline with the fluorescent packet being removed obtained in step III from the original Raman peak spectrum, thus obtaining the finalRaman spectrum with the drifting of the Raman baseline being eliminated. By adopting the method, the stability in the correction process can be ensured, and the correction speed of the baseline can increase.

The invention discloses a safety early warning method, device and system and a computer storage medium. The method comprises the following steps: respectively scanning a transformer substation with first preset precision and second preset precision to obtain a pre-scanning model and a correction scanning model; obtaining a rotation value and a translation value according to the pre-scanning model and the correction scanning model; performing subsequent multiple identification scanning with second preset precision on the transformer substation in real time, and correcting an identification scanning model obtained by each identification scanning according to the rotation value and the translation value to obtain a corrected identification model, wherein in the process, the correction time of an operator is saved, and the correction speed is increased; obtaining a target object in the correction recognition model; calculating a real-time distance from the target object to a cable in the pre-scanning model; and judging whether to perform safety early warning on the target object according to the real-time distance. The position of the target object in the transformer substation can be judged so as to ensure that early warning is performed in time to avoid the safety problem before the safety problem occurs, and meanwhile, accurate and real-time problems are ensured.