34results about How to "Calibration automatic" patented technology

The invention discloses a method and a device for realizing trapezoidal distortion correction of a projection surface and a projector. The method comprises the following steps: measuring the variation trend of the distance to the projection surface by a rotatable distance measuring instrument; determining a correction intersection angle according to the variation trend; and correcting the trapezoidal distortion according to the determined correction intersection angle. Through the method disclosed by the invention, trapezoidal distortion correction is automatically and accurately realized.

The embodiment of the invention provides a method for calibrating a pedal open degree value, a calibrating device and a vehicle. The method comprises the following steps that after a vehicle is started, the calibrating device arranged in the vehicle obtains a first open degree value from a memory, wherein the first open degree value is the preset minimum open degree value of a pedal; the calibrating device detects a second open degree value through a sensor of the pedal, wherein the second open degree value is the current minimum open degree value of the pedal; and the calibrating device uses the second open degree value to calibrate the first open degree value. According to the embodiment, when the current minimum open degree value of the pedal is different from the preset minimum open degree value of the pedal, the current open degree value of the pedal can be used for calibrating the preset minimum open degree value of the pedal so that the vehicle is controlled according to the calibrated minimum open degree value; thus the pedal calibration can be automatically performed without artificial participation; and the pedal calibration cost is reduced.

The invention discloses a calibration method and device for a camera device and calibration equipment. The method includes: obtaining a plurality of images shot by a camera device for a movable calibration device, wherein the images comprise a calibration reference object arranged on the calibration device; obtaining the position of calibration equipment corresponding to each image; obtaining a relative installation position relationship between the calibration reference object and the calibration equipment; and calibrating the external parameters of the camera device according to the relativeinstallation position relationship, the plurality of images and the position of the calibration equipment corresponding to each image. The calibration equipment can move in a scene in which a to-be-calibrated camera device is deployed; an image acquired by the to-be-calibrated camera device is acquired and processed, a spatial position relation and between a calibration reference object and the to-be-calibrated camera device is constructed, self-positioning is performed, and finally the to-be-calibrated camera device in the scene is automatically and conveniently calibrated. According to themethod, manual calibration operation is not needed, and the calibration efficiency of the camera device is remarkably improved.

The invention discloses an electronic scale temperature correction method and a device. The method comprises the steps of obtaining environment temperature after obtaining a weighting result by an electronic scale; respectively comparing the obtained environment temperature value with an electronic scale working temperature upper limit value and an electronic scale working temperature lower limit value which are preset in an electronic scale local position; calling a correction list preset in the electronic scale local position and obtaining a corresponding correction value in the correction list in a matching way according to the obtained environment temperature if the environment temperature value is higher than the electronic scale working temperature upper limit value preset in the electronic scale local position, or the environment temperature value is lower than the electronic scale working temperature lower limit value preset in the electronic scale local position; and carrying out correction on the weighting result according to the correction value obtained by matching. By using the method, when the electronic scale works in a condition that the environment temperature value is higher than a limiting temperature range value preset in the local position, the weight result of the electronic scale can be corrected automatically, so that an accurate weighing result is obtained.

The invention provides a projection image correction method and a projection device. The method comprises the steps of projecting a correction image of which four angles are equipped with correction identification points in a projection screen; moving the correction identification points in the correction image to the four angles of the projection screen; obtaining the coordinate values of the correction identification points in the correction image after movement; and projecting the coordinate values of the four vertex angles of the original projection image to the coordinates of the correction identification points according to an image geometric correction algorithm and carrying out image projection display according to the coordinate values after projection, thereby correcting the projection image automatically by the projection device. According to the method, the system and the projection device, the image geometric correction is realized by the low cost method without a camera or an accelerometer, the projection image and the projection screen can be matched precisely, the intelligence of the projection device is improved, and moreover, convenience is provided for a user.

The invention discloses a correction method for a patent certificate image with any inclination angle. The correction method comprises the following steps: graying the input patent certificate image and then performing Gaussian filter; performing Canny edge detection on the filtered image to obtain a basic skeleton line of the certificate image; acquiring the inclination angle of the skeleton line by using Hough transformation; obtaining the inclination angle of the first correction according to the principle that the minority is subordinate to the majority and then rotating the image; next, judging the inclination angle of the second correction according to the position of a round stamp in the certificate image corrected for the first time; and rotating the image according to the inclination angle to finally finish the inclination correction of the patent certificate image.

A method for calibrating a network camera, the method comprising: regularly reading the acceleration of gravity value sensed by the gravity sensor in the network camera; when the acceleration of gravity value is different from the preset acceleration of gravity, judging whether the current acceleration of gravity value exceeds The preset critical value; when it is determined that the current acceleration of gravity value exceeds the preset critical value, it is judged whether the acceleration of gravity value of the network camera has undergone continuous and irregular changes; when it is determined that the acceleration of gravity value of the network camera has sustained and irregular changes When changing, the alarm unit controlling the network camera sends out an alarm using a preset alarm mode. The invention also provides a network camera correction system. The invention can timely and conveniently correct the network camera.

The present invention disclosed a correction method of a spherical near -field antenna measurement system. It belongs to the field of antenna measurement technology. The antenna measurement system includes the main control module, motion controller, receiver, pitch scanning rack, probe array, positioning, multi -channel switch, multi -channel switch, Correct the antenna, when the probe array is corrected, the corrected antenna emit signal, through space transmission, reach the probe array, and collect the correction data from the probe antenna in the probe array.Scan up to position 1, and collect the correction data to D again; scan down from the pitch scanning rack to the position 2, and collect the correction data to F again. Three sets of correction data are calculated to obtain a set of correction coefficients, and the coefficient is loaded to the near field to the field.Measure the software and automatically modify the measurement data during the test.The correction accuracy of the invention is high, the correction cost is low, and the correction speed is fast. It provides a new and efficient solution for the problem of multi -probe correction of the sphere.

The invention discloses a method and device for realizing the correction of trapezoidal distortion of a projection surface, and a projector, including measuring the variation trend of the distance from the projection surface by using a rotatable rangefinder, and determining the correction angle according to the variation trend; according to the determined correction The included angle corrects for keystone distortion. Through the method of the invention, the trapezoidal distortion correction is realized automatically and accurately.

The invention provides a continuous background correction method based on an interpolation method in laser-induced breakdown spectroscopy. The continuous background correction method comprises the following steps: S1, collecting a laser-induced breakdown spectrum with continuous background interference, acquiring all minimum value points of the spectral intensity value, and sorting the minimum value points according to an ascending sequence of the wavelength; S2, defining a window function; S3, sorting N minimum value points in the window function according to an ascending sequence of the spectral intensity value, and selecting and storing the previous M minimum value points; sliding the window function from a first minimum value point of spectral data, and sorting and selecting once after each sliding operation; after traversing all the minimum value points, using selected points as a new minimum value point set; S4, performing interpolation calculation on the new minimum value points, and using interpolation results for estimating continuous backgrounds; S5, according to the estimated continuous backgrounds, calculating signal-to-background ratios, and using the continuous background, estimated when the signal-to-background ratio is maximum, as a final continuous background estimation value. By the continuous background correction method, the performance of spectroscopic analysis can be improved.

The embodiment of the invention provides a method for calibrating a pedal open degree value, a calibrating device and a vehicle. The method comprises the following steps that after a vehicle is started, the calibrating device arranged in the vehicle obtains a first open degree value from a memory, wherein the first open degree value is the preset minimum open degree value of a pedal; the calibrating device detects a second open degree value through a sensor of the pedal, wherein the second open degree value is the current minimum open degree value of the pedal; and the calibrating device uses the second open degree value to calibrate the first open degree value. According to the embodiment, when the current minimum open degree value of the pedal is different from the preset minimum open degree value of the pedal, the current open degree value of the pedal can be used for calibrating the preset minimum open degree value of the pedal so that the vehicle is controlled according to the calibrated minimum open degree value; thus the pedal calibration can be automatically performed without artificial participation; and the pedal calibration cost is reduced.

The invention provides a clock receiver and related semiconductor memory module and correction method. The clock receiver comprises: a receiving units, for receiving a pair of complementary clock signal and produce a first clock signal; a correction unit, for detecting if there is a offset for crossing point of complementary clock signal and produce a result then regulating the first clock signal toggling. Crossing point offset resulting from inconsistent work cycle of clock signal VCLK / VCLK can be automatically corrected in the invention, thereby not influencing clock signal margin of internal circuit.