1682results about How to "Improve the correction effect" patented technology

The apparatus comprises a correction unit composed of a video camera module for capturing the color information of the screen, an image data buffer module, and a main control module used for receiving and executing the computer command. Said video camera module and image data buffer module are respectively connected to the multi-screen display wall and computer via the main control module. The method comprises: appointing the image displayed by each display unit on the multi-screen display wall; said video camera module shoots at least one picture and saves it in the image data buffer module; the computer extracts the color information from each display unit; according to the color of each display unit, the computer corrects the difference between said display units.

The invention discloses a method for automatic correction and tiled display of plug-and-play large screen projections. The method comprises the steps as follows: adaptively generating a checker pattern with a certain resolution ratio, projecting by projectors in sequence, capturing by cameras, carrying out feature detection and identification on complicated projection surfaces or checkers under the illumination condition with a multi-feature detection method based on color and geometry, and creating a Bezier curve function to represent a corresponding relation of points between projector images and camera images; and obtaining effective display areas for screen projection with a quick approach method, determining a corresponding relation of the projection contents of the projectors and the display areas, carrying out geometrical distortion on the images to be projected for geometrical correction, and calculating weight values of pixels in projection overlapping areas with a distance-based nonlinear weight value distribution method for fusion of edge brightness. According to the invention, a plurality of projection images of irregular surfaces can be aligned and seamlessly spliced, and the whole method is simple and easy to use, higher in autonomy and better in seamless splicing performance.

An analyzing means first calculates the blur direction and blur level of a digital photograph image based on edge widths and histograms of the edge widths obtained in each direction, and discriminates whether the image is a blurred image or a normal image. Then, it further calculates the camera shake level and blur width for the image discriminated to be a blurred image. A parameter setting means sets a one-dimensional correction mask and a two-dimensional correction mask based on the blur width. It also sets a correction level based on the blur level. It further makes an adjustment to the ratio between the one-dimensional and two-dimensional correction masks based on the camera shake level.

The invention relates to a power battery management system of an electric automobile. In order to improve the estimating precision, the invention provides a method for estimating a charge state of a power battery of the electric automobile. The method comprises the following steps: acquiring the terminal voltage, the charging and discharging current and the battery surface temperature of the power battery; according to a corresponding relationship between the open-circuit voltage and the state of charge of the power battery, analyzing to obtain an open-circuit voltage model, and according to an input matrix, a parameter matrix and an output matrix of a dynamic voltage system of the power battery, establishing a dynamic voltage model of the dynamic voltage system; updating time and measurement of a state observer to obtain priori estimated values and posteriori estimated values of a system state as well as a covariance matrix of a system state estimating error at a time point k, and circulating the updating operation till the end of estimation to obtain the state of charge (SoC) of the power battery. By the method, the estimating precision of the SoC can be improved to be within 5%, and when a set value of the SoC of the power battery is deviated from a reference value of the SoC of the power battery, the SoC is rapidly converged to the reference value.

A color correction apparatus and method are provided. The color correction apparatus includes: a chromatic region determination module determining a first chromatic region to which an input pixel constituting an input image belongs and a second chromatic region neighboring the first chromatic region on a basis of specified chromatic region division information; a polynomial regression operation module performing polynomial regression on the first chromatic region and the second chromatic region; and a blending module providing corrected pixel information for the input pixel by giving weight values to results of the polynomial regression on the first chromatic region and the second chromatic region. The color correction method includes: determining the first and second chromatic regions; performing polynomial regression on the first and second chromatic regions; and providing corrected pixel information for the input pixel by giving weight values to results of the polynomial regression on the first and second chromatic regions.

A camera is provided with which a small size can be achieved while ensuring good image blur correction performance. The camera (1) has an optical system (O), a housing (2), a second drive unit (12) serving as part of an image blur corrector, an imaging element (17), a first angular velocity sensor (4), an acceleration sensor (7), a sensor drive unit (240), and a drive controller (22). The first angular velocity sensor (4) is configured to acquire the rotational angle of the housing (2). The acceleration sensor (7) is configured to acquire the amount of displacement of the housing (2). A correction computer (21) calculates the amount of drive of a correcting lens (9) from the displacement amount acquired by the acceleration sensor (7), and calculates the amount of drive of the correcting lens (9) from the rotational angle acquired by the first angular velocity sensor (4) using the position of the acceleration sensor (7) as a reference. The drive controller (22) controls the operation of the second drive unit (12) on the basis of these drive amounts.

A C-type arm image correction method based on perspective imaging model calibration comprises the following four steps: step 1, designing a calibration panel calibrated by a C-type arm system; step 2, obtaining distortion coordinates of marked points by image processing on distorted images; step 3, calibrating the C-type arm system, including system calibration of three dimensional coordinates of marked points on the calibration panel, perspective imaging models, distortion models and distortion coordinates to obtain perspective imaging parameters; step 4, correcting images, namely, the calibrated perspective imaging models are used for correcting the distorted images. In the method, the C-type arm system calibration and the C-type arm X-ray distorted projected image correction are considered as a whole on line, and the C-type arm system is calibrated and the C-type arm X-ray distorted projected image is corrected based on the perspective imaging model of the camera, thereby changing the traditional method that image correction is first carried out off line and then linear calibration is carried out and ensuring concise and convenient system steps an easy on-line use.

The invention discloses a method and a device for correcting colors of a multi-screen splicing wall. The method comprises the following steps of: dividing screen images of display units into a plurality of color areas, shooting an image of the splicing wall, extracting set values of base color parameters, reshooting an image of the splicing wall, extracting real-time values of the base color parameters, comparing the real-time values with the set values, judging whether the color difference values are in a set range, and adjusting the colors of the display units, the color difference values of which exceed the set range. The device comprises the splicing wall, a camera, a main control unit and a color correcting unit, wherein the camera is arranged in front of the splicing wall; the main control unit is connected with the camera, the color correcting unit and each screen respectively; the color correcting unit is connected with the camera; and the color correcting unit is color correcting software installed in a computer. The method and the device can realize full automation in the color correcting process, have low cost and good correcting effect, mainly have high speed, and correct the colors of the whole screens to be accordant without color switching of the display units.

Spinal canal expansion through pedicle lengthening in combination with spinal column stabilization, to treat spinal stenosis, spondylolisthesis, kyphosis, scoliosis or a major spinal rotational deformity, with or without a spinal fusion. A device or implant that includes a pedicle lengthening implant to decompress (expand) the spinal canal, and a bridge to connect two or more pedicle lengthening implants and / or pedicle screws or bone anchors to achieve simultaneous spinal stabilization across one or more vertebral segments. The bridge across the vertebral segments can include a longitudinal member, such as a plate or rod. The pedicle lengthening implant is originally made, or can be modified to, connect to the longitudinal member. Spinal deformity can be manipulated, through operation of one or more pedicle lengthening implants in respective vertebral segments, to improve a relative relationship between the respective vertebra segments, the longitudinal member then fixating the vertebral segments into a multi-level spinal construct.

The invention discloses a rapidly converged scene-based non-uniformity correction method, wherein the aim of non-uniformity correction is achieved by minimizing interframe registration error of two adjacent images. The method mainly comprises the following steps of: initializing gain and offset correction parameters and acquiring an uncorrected original image; acquiring a new uncorrected original image, and carrying out non-uniformity correction on the new uncorrected original image and the previous uncorrected original image by utilizing the current non-uniformity correction parameters; obtaining relative displacement, scene correlation coefficient and interframe registration error of two corrected images by utilizing an original point masking phase correlation method; and updating correction parameters along the negative gradient direction by adopting a steepest descent method. The method disclosed by the invention has the advantages of high correction accuracy, fast convergence speed, no ghost effect and low calculated amount and storage content and is especially applicable to being integrated into an infrared focal plane imaging system, and the effect of improving imaging quality, environmental suitability and time stability of an infrared focal plane array is achieved.

An image processing method of creating image data for forming an image on a recording medium by ejecting liquid droplets from a plurality of nozzles of a recording head onto the recording medium while causing relative movement of the recording medium and the recording head, includes: a correction coefficient storage step of determining correction coefficients for ejection failure correction based on difference of landing interference patterns of a plurality of types, according to correspondence information indicating correspondence relationship between the landing interference patterns and the respective nozzles, the landing interference patterns being based on a landing interference inducing factor including a deposition sequence of the liquid droplets on the recording medium that is defined by an arrangement configuration of the plurality of nozzles and a direction of the relative movement, and storing the correction coefficients for ejection failure correction according to the landing interference patterns, in a storage unit; an ejection failure nozzle position information acquisition step of acquiring ejection failure nozzle position information indicating a position of an ejection failure nozzle which cannot be used for forming the image, of the plurality of nozzles; and a correction processing step of performing a correction calculation on input image data using a corresponding correction coefficient obtained by referring to the correction coefficients for ejection failure correction according to the ejection failure nozzle position information, so as to generate image data corrected in such a manner that output of the ejection failure nozzle is compensated by a nozzle other than the ejection failure nozzle.

The invention relates to a parameter adjusting method and device of a camera for correcting an LED (Light Emitting Diode) display screen. The method comprises the following steps of: (a) controlling a region to be measured of the LED display screen to display an appointed picture; (b) controlling the camera to shoot the region to be measured to obtain an image of the appointed picture; (c) analyzing the image of the appointed picture to obtain an image gray value of an LED pixel point in the image and utilizing a distribution condition of the obtained image gray value to judge whether an exposure quantity of the camera meets the requirements or not; and (d) when judging that the exposure quantity of the camera does not meet the requirements, calculating a parameter adjusting target value of the camera according to the distribution condition of the obtained image gray value and controlling a camera adjusting parameter to the parameter adjusting target value to realize the adjustment of the exposure quantity of the camera. According to the parameter adjusting method and device disclosed by the invention, the adjustment of the exposure quantity of the camera can be automatically finished and the disadvantages of operation convenience and measurement accuracy in an LED display screen correction process of the prior art are effectively overcome.

The invention discloses a correction method of radar calibration errors. The correction method comprises steps of: firstly, selecting two tracks from the same observation target from an ADS-B system and a radar situation graph; further selecting multiple track segments approximate to straight lines from the tracks; by use of the whole least square method based on outlier elimination, carrying out straight line fitting on the track segments; eliminating abnormal points in the track segments; solving an included angle between every fitted straight lines of the same track segment of the radar and the ADS-B; solving an average value for included angles of the track segments, thereby obtaining an included angle average value of two tracks of the target; then, selecting multiple observation targets, and solving the corresponding included angle average value of the two tracks by use of the above method; carrying out averaging calculation on all included angle average values, and finally obtaining a calibration error angle of the radar; and by use of the calibration error angle, compensating an azimuth angle measured by the to-be-corrected radar, thereby finishing the correction on the to-be-corrected radar calibration errors. According to the invention, quantitative analysis and proving are performed through measured data, so the correction method is simple in design, convenient to operate and highly practical, has very obvious correction effects on the radar calibration errors and precision degree of tracking a flight target by the radar is greatly increased.

The invention discloses a partial active power factor correcting circuit, comprising a current detecting circuit, for real-time detecting the output current of a rectifying circuit; a power factor control unit, for obtaining the actual current waveform which reflects the real-time change of the current before the correction according to the current realtime value detected by the current detecting unit before the power factor correcting circuit starts working, and working out the continuous sine waveform as the expected current waveform with the same waveform, the same frequency and the continuous sine waveform according to the waveform; after obtaining the current waveform, the power factor control unit computes the difference between the expected current waveform and the real-time detected current actual measurement waveform, and controls the on / off of the controlled switch always in the ascending stage of the waveform and the moment with the largest difference, and controls the on / off of the controlled switch after delaying some time. The partial active power factor correcting circuit of the invention causes the actual current waveform consistent with the expected current waveform, which realizes the optimum correcting effect.

The invention discloses a VR (Virtual Reality) eyesight correction method and device. The device comprises a photographing assembly, a display screen, a self-adaptive visual range adjusting mechanism and a processor; the photographing assembly is used for acquiring video data of a realistic environment according to vision angles of human eyes and transmitting the video data to the processor; the processor is used for carrying out virtualized processing on the received video data to convert the video data into 3D (Three Dimensional) data of a virtual environment, transmitting the 3D data to the display screen and carrying out quantification processing on an induction signal to obtain a visual range adjusting signal; the display screen is used for displaying the virtual environment of the 3D data; the self-adaptive visual range adjusting mechanism comprises a lens, a sensor for acquiring a distance between a scene and the human eyes and generating the induction signal and a lens adjusting assembly which is used for adjusting the distance between the lens and the display screen according to the visual range adjusting signal. By adopting the VR eyesight correction method and device provided by the invention, the surgical risk of eyesight correction can be reduced and the eyesight correction effect can be improved.

The present invention provides a real-time hydrologic forecasting system. The real-time hydrologic forecasting system comprises a data input module, a model base and a data output module, and the model base comprises a grid unit runoff module, a sub catchment conflux module, a catchment river conflux module and a real-time correction module. According to the system, values or parameters adopted by calculation in the next forecasting can be appropriately adjusted by utilization of up-to-date information obtained during the forecasting process, a series of previous forecasting error information including the current period are considered for each forecasting, the future prediction value is corrected according to the tracking technology of the automatic control theory, and hydrologic forecasting precision is increased. In addition, the system is based on a distributed Xin'an River model based on grids, and compared with a traditional model, the system can be operated for a catchment having few data. The system has a visual interface, and operation practicality is high.

An enhanced forward error correction system is disclosed. Transmitted data is encoded into codewords in multiple dimensions. The decoding of received data by a decoder is performed in multiple passes in each dimension, with corrected data provided as an output from each pass into another decoder for the next decode pass. The encoder in one embodiment comprises a parallel inner RS(247,239) encoder or encoders and parallel outer BCH(255,247) encoder or encoders. Additional steps are added for error multiplication reduction. The system provides an approach to detect generally uncorrectable patterns for concatenated codes and provides a correction mechanism for improving error correction performance.

The embodiments of the invention provide an audio correction method and device. The method comprises: acquiring first audio data; acquiring a first pitch contour which is a pitch contour of the first audio data; sequentially performing scale correction and tone correction on the first pitch contour according to a second pitch contour to obtain a corrected first pitch contour, wherein the second pitch contour is a pitch contour of second audio data corresponding to the first audio data; converting the corrected first pitch contour into audio signals to obtain corrected first audio data. Taking a song as an example, the method and the device enable the corrected pitch contour of the song sung by a user to be consistent with the trend of the pitch contour of the original song, and the rise and fall of the pitch contour of the song sung by the user are closer to those of the original song over correction, so that the rhythm and listening feeling of the song sung by the user are greatly improved, and the correction effect on audio data of songs and the like is improved.

The invention discloses integrated equipment for manufacturing battery pole pieces and winding a battery cell. The equipment comprises a winding part deviation correcting mechanism used for correcting the deviation of at least one of the positive pole piece and the negative pole piece after the pole pieces are manufactured, and the winding part deviation correcting mechanism comprises a motor, a cam, a transition wheel bracket, a transition wheel shaft, a transition wheel, a rotating shaft and a deviation correcting detection mechanism, wherein an output shaft of an electrode is coupled to the cam; the transition wheel bracket is elastically connected with a stand through an elastic component; the output end of the cam acts on one end of the transition wheel bracket, while the other end of the transition wheel bracket is pivotably fixed on the rotating shaft; the rotating shaft is fixed on the stand, and the transition wheel shaft is fixed on the transition wheel bracket; the transition wheel is arranged on the transition wheel shaft; and the pole pieces pass through on the transition wheel.

The invention belongs to the field of the signal processing technology, and discloses a duty ratio correcting circuit. The duty ratio correcting circuit comprises an input buffer, a duty ratio regulating circuit, a first-level CML-CMOS converting circuit and a duty ratio comparison circuit, wherein the input buffer is used for receiving a differential signal clka and a differential signal clkb, achieves initial adjustment of the duty ratio of the differential signals by setting a common mode level, and outputs a signal outla and a signal outlb, the duty ratio regulating circuit receives the signal outla and the signal outlb and outputs a signal out2a and a signal out2b, the first-level CML-CMOS converting circuit receives the signal out2a and the signal out2b, amplifies and rectifies the signal out2a and the signal out2b, and outputs a signal out3a and a signal out3b, and the duty ratio comparison circuit receives the signal out3a and the signal out3b, carries out amplification and integration on errors of the duty ratio, outputs a differential control voltage Vc+ and a differential control voltage Vc-, and feeds back the differential control voltage Vc+ and the differential control voltage Vc- to control the duty ratio regulating circuit. The duty ratio regulating circuit comprises a differential amplifier circuit and a compensation regulating unit, wherein the differential amplifier circuit amplifies the signal outla and the signal outlb, regulates the duty ratio, and outputs the regulated duty ratio to a next-level circuit, and the compensation regulating unit receives and feeds back the differential control voltages, outputs current compensation, regulates and outputs the common mode level of the signal out2a and the signal out2b and achieves feedback regulation of the duty ratio. The duty ratio correcting circuit improves correcting accuracy and efficiency.

The invention provide a film conveying deviation-rectifying device combining the tension control, which comprises a film input guiding roller, an output guiding roller, a deflection detecting mechanism, a tension detecting mechanism, a controller and a deviation-rectifying actuating mechanism, wherein the film input guiding roller and the output guiding roller are used for inputting a film guide into the deviation-rectifying actuating mechanism and outputting the film guide from the deviation-rectifying actuating mechanism; the deflection detecting mechanism is used for detecting whether the film deflects or not; the tension detecting mechanism is used for detecting the film tension; the controller is used for generating deviation-rectification or / and tension control instruction as per the detection information; the deviation-rectifying actuating mechanism comprises a spherical motor, a deflection frame and a deviation-rectification roller; a runner of the spherical motor drives the deflection frame to rotate on a feeding surface of the film; the friction between the rectification roller and the film drives the inverse rotation of the film to realize the deviation-rectification; meanwhile, the runner of the spherical motor drives the deflection frame to rotate on the surface vertical to the feeding surface of the film, so as to tighten or loose the film to realize the tension control. According to the invention, the deviation-rectification and the tension control of the film can be realized simultaneously, the influence of the tension variation on the deviation-rectification is greatly reduced, the structure is simple, and the deviation-rectifying precision is high.

A defective recording element correction parameter selection chart which is output by an image forming apparatus that performs image formation on a recording medium by a plurality of recording elements included in a recording head while conveying at least one of the recording head and the recording medium so as to cause relative movement between the recording head and the recording medium, the chart being used, in a case where there is at least one defective recording element which is not able to perform recording among the plurality of recording elements, in order to determine a defective recording element correction parameter expressing an amount of correction for correcting image formation defects caused by the at least one defective recording element, with image formation by a recording element other than the at least one defective recording element, the chart includes: a reference patch constituted by a uniform image which is an image formed on a region of the recording medium with a uniform density based on a constant tone; and at least one measurement patch in which a state after correction using the amount of correction corresponding to a candidate value of the defective recording element correction parameter which expresses the amount of correction is reproduced in a state that one or more of the recording elements which have formed the reference patch are set to be in a non-recording state, the candidate value of the defective recording element correction parameter being applied to an image formation portion which is formed by a recording element that carries out recording in a vicinity of a non-recording position of the one or more of the recording elements which have formed the reference patch and have been set to be in the non-recording state.

Provided is a lens optical system, which includes (from object to image side) a first lens group having positive refractive power, a stop, and a second lens group having positive refractive power. The first lens group comprises a plurality of lenses among which there are a lens closest to the object side and a lens closest to the stop having negative refractive powers. The second lens group includes a front group and a rear group.

The invention discloses a PET scanning device and a time migration correcting method thereof. The PET scanning device comprises a cylindrical rack. A plurality of detector crystals are arranged on the inner side of the cylindrical rack. A hollow cylindrical die body of an injection source capable of being used for PET scanning device time migration correction is arranged in the cylindrical rack. The hollow cylindrical die body is arranged in the mode that the center axis of the hollow cylindrical die body and the center axis of the cylindrical rack are overlapped. According to the PET scanning device and the time migration correcting method of the PET scanning device, the hollow cylindrical die body of the injection source is utilized for calculating the time migration correction value of each detector crystal and carrying out time correction on coincidence events, the die body area which is really effective for time migration correction is sufficiently utilized, and the non-effective area is directly abandoned, so that existing TOF-PET time correction efficiency and effect are effectively improved, and correction is easy, convenient and reliable.

An image capturing apparatus comprises a shake detection unit configured to detect a shake, a motion vector detection unit configured to detect a motion vector indicating movement of an image from a captured image signal, a motion vector output control unit configured to selectively output an output of the motion vector detection unit and an output of the shake detection unit, a correction amount calculation unit configured to calculate a shake correction amount based on at least one of the output of the motion vector output control unit and the output of the shake detection unit; and a correction unit configured to correct the image blurring of the captured image based on the shake correction amount.

The invention provides a model-free wavefront distortion correcting system based on a spatial light modulator. The system consist of a polarizing sheet 1, a telescopic system 2, a beam splitter prism 3, a shrinkage device 4, a CCD camera 5, a computer system 6, the spatial light modulator 7, a wavefront controller 8 and a monitoring camera 9. The common CCD camera is adopted to form images; a Strehl ratio of beams is analyzed according to the model-free iteration theory to obtain control signals of optimization parameters required by a wavefront corrector; the performance indexes of the system such as imaging definition, receiving light energy and the like are directly used as objective functions of an optimization algorithm to optimize and acquire the correction effect close to a diffraction limit; and the optimization parameters are calculated in parallel by a computer with a graph processor, the acquired multi-channel control signals are transmitted to the wavefront controller, and then the wavefront controller drives the spatial light modulator to achieve real-time correction of wavefront distortion phase so as to effectively solve the problem of wavefront distortion in atmospheric laser communication.

The present invention discloses a certification image inclination correction method and device, belonging to the image processing technology field. The method comprises: obtaining a certification image; employing a plurality of detectors to preliminarily determine the direction of the certification image, and regulating the direction of the certification image according to the preliminarily determined direction; determining the regulated character position on the certification image to obtain a character distribution map; determining a final rotation angle according to the character distribution map; and rotating the certification image according to the final rotation angle. In the embodiment, a plurality of detectors are used for performing rough direction detection and perform preliminary correction of the certification image, and precision detection is performed based on the character distribution map to perform fine tuning of the certification image so as to ensure the corrected whole direction through the preliminary correction; and after the preliminary correction, it is needed to detect the angle of inclination in a small range and then perform corresponding fine tuning, and compared to one-time regulation, the two-step correction mode is high in regulation precision and good in correction effect.

The invention discloses a master-slave point-by-point correcting method for an LED display screen, which comprises a master control end and a slave control end, and comprises the following steps: A1, the master control end transmits a command to the slave control end, and the slave control end controls the LED display screen to display a test image according to the command; A2, an image acquiring device is utilized to acquire the test image while the test image is displayed; A3, the luminance characteristic value of LED lamp spots in the test image is calculated; A4, the adjusted lamp spot luminance data is calculated according to the correction coefficient preset by the system, and the master control end transmitts the lamp spot luniance data to the slave control end; A5, the LED display screen is controlled to display a corrected effect image according to the lamp spot luminance data; and A6, according to the corrected image, correcting the preset correction coefficient until the satisfied effect is obtained.

The invention relates to a road matching method based on the fusion of a probe vehicle movement track and an electronic map. The method is characterized in that an urban road network is divided by adopting a mesh division technology, so that the road section search complexity can be greatly reduced; a map matching method fusing a three-section matching concept of reference historical data and prospective data and an improved weight model concept is adopted for overcoming the weaknesses by acquiring strong points, the matching degree calculated by adopting the weight model is adopted as the evidence, and the three-section matching concept is used for making the decision, so that the reliability of the decision evidence and the reasonability of a result decision can be improved, and the relatively high matching precision can be achieved by virtue of the minimum complexity.