1736results about How to "Accurate correction" patented technology

An object of the present invention is to provide a charging system which carries out position confirmation of a moving body at a place where there is a radio wave blocked facility, and which carries out automatic detection of GPS antenna blockage for avoiding charging. In a charging system including a GPS positioning device 921 for recognizing a vehicle position, a vehicle speed pulse measuring device 920 for dead reckoning navigating, a monitor device 920, 927, 928 which generates information expressing a current position by using these, and a charging processing 902 which judges whether or not a recognized current position is within a charge area and which carries out data processing for charging, the monitor 920 includes a simple map database 928 which includes positions of facilities or geographical features at which GPS positioning is impossible, and when GPS positioning is impossible, the facility or geographical feature corresponding to the current position is detected, and that position is made to be a current position.

A display unit including a display region including a plurality of luminescence elements, a non-display region including a plurality of luminescence elements and a photoreception element, a drive unit connected to each of the luminescence elements in the display region, a photoreception drive circuit connected to the plurality of luminescence elements in the non-display region, and a photoreception processing unit which receives a signal output from each of the plurality of luminescence elements in the non-display region and outputs a degradation signal to the drive unit, the drive unit providing a signal to the plurality of luminescence elements in the display region based on the degradation signal.

The present invention relates to a method for compensating ageing effects of pixel outputs displaying an image on a display device. The method involves displaying a first image on an active display area (6) on the display device (1) having a first plurality of pixels; displaying a second image on a sub-area (7) of the display device (1) and having a second plurality of pixels, the active display area (6) being larger than the sub-area (7) and the second image being smaller than the first image and having fewer pixels than the active display area (6); driving the pixels of the sub-area (7) with pixel values that are representative or indicative for the pixels in the activity display area (6); making optical measurements on light emitted from the sub-area (7) and generating optical measurement signals (11) therefrom, and; controlling the display of the image on the active display area (6) in accordance with the optical measurement signals (11) of the sub-area (7).

A plurality of correction images are obtained while changing the radiation energy of an incident radiation in the absence of an object. Subsequently, an object image is obtained in the presence of the object by emitting the radiation to the object. Then, the object image is corrected by using a correction image obtained under a radiation energy condition closest to the radiation energy of the obtained object image.

A reference voltage generation circuit has transistors generating a PTAT current that increases in proportion to temperature, a transistor generating a CTAT current that decreases in proportion to temperature, a first variable resistor adjusting an output voltage, a transistor supplying the PTAT current to the first variable resistor via a first switch, a transistor supplying the CTAT current to the first variable resistor via a second switch, and a second variable resistor adjusting the CTAT current. The first switch is on in first and third operation modes and off in a second operation mode. The second switch is on in the first and second operation modes and off in the third operation mode. Switching the operation modes realizes independently outputting a PTAT voltage or a CTAT voltage. Independently adjusting the voltages makes it possible to correct output reference voltage of the reference voltage generation circuit accurately at low cost.

A method of synchronizing a user's biosignal data received from a plurality of measurement devices is provided, including: transmitting a time set command to each of the plurality of measurement devices; receiving the user's first biosignal data from each of the plurality of measurement devices, the first biosignal data including a time axis and the time axis including a measurement start time and a measurement termination time; comparing the measurement start time and the measurement termination time with a standard time; and generating second biosignal data from corrected first biosignal data, corrected by referring to the standard time, when the comparison results in an error; and synchronizing a plurality of the second biosignal data and generating third biosignal data, wherein each of the plurality of measurement devices receives the time set command and generates the first biosignal data.

A 2-D correction system uses intermittent deployment of aerodynamic surfaces to control a spin or fin stabilized projectile in flight; correcting both crossrange and downrange impact errors. Intermittent surface deployment develops rotational moments, which create body lift that nudge the projectile in two-dimensions to correct the projectile in its ballistic trajectory. In low spin rate projectiles (“fin stabilized”), the rotational moment directly produces the body lift that moves the projectile. In high spin rate projectiles (“spin stabilized”), the rotational moment creates a much larger orthogonal precession that in turn produces the body lift that moves the projectile. The aerodynamic surfaces are suitably deployed over multiple partial roll cycles at precise on (deployed) and off (stowed) positions in the cycle to nudge the projectile up or down range or left or right cross range until the desired ballistic trajectory is restored.

The invention discloses a garment QD code recognition method. The method includes the following steps that firstly, a two-dimension code image attached to a garment raw material is collected; secondly, the image is subjected to graying, fast median filtering and binarization processing; thirdly, the image having been subjected to binarization processing is subjected to edge extraction; fourthly, two side edge regions obtained after edge extraction of a QR code are separated out; fifthly, Hough transform is adopted to detect a side-edge imaginary line so as to obtain the deviation angle of the QR code; sixthly, the image having been subjected to binarization processing is rotated according to the bilinear interpolation method, and initial correction is carried out; seventhly, the QR code is positioned, the sequence of three view finding images is determined, and the QR code is adjusted to have a correct orientation according to the image matrix transposition turning method; eighthly, decoding is carried out according to the national two-dimension code standard. According to the method, due to the combination of projection cutting and the Hough transform method, the deviation angle of the QR code can be quickly and accurately acquired, the collected image is immune from noise pollution and uneven illumination, and the two-dimension code image easy to identify can be obtained through transform.

The invention discloses an optical compensation method and an optical compensation device of a display panel. The optical compensation method includes lightening the display panel according to a set grey scale in a standard grey scale range to acquire real display brightness of each pixel of the display panel; determining a compensation grey scale stepping value of each pixel according to the realdisplay brightness of each pixel, target brightness corresponding to the set grey scale and corresponding relation between brightness and grey scale; according to the determined compensation grey scale stepping value of each pixel and a predetermined extension gamma curve, subjecting each pixel to gamma voltage correction to enable each pixel to reach the target brightness. The extension gamma curve includes the standard grey scale range, a first extended grey scale range smaller than the smallest grey scale, and a second extended grey scale range larger than the largest grey scale, so that grey scales on the edge of the original standard grey scale range can be adjusted towards larger or smaller gamma voltage, each grey scale in the original standard grey scale range can be corrected accurately, and gamma correction capability is improved.

A flicker detection region in which an image signal has values relating to luminance and colors within predetermined ranges is extracted from a plurality of flicker detection regions allocated in the vertical and horizontal directions of an image. A flicker component is detected using the luminance information of the image signal in the extracted flicker detection region. A correction value to correct the flicker component is generated from the detected flicker component. This makes it possible to accurately correct, using a simple arrangement, a flicker component contained in an image sensed under a light source whose brightness periodically changes even when the object or the image sensing apparatus moves.

A monitoring system includes an image sensor configured to produce pixel data. An ambient light sensor such as a photocell produces ambient light level data. A processing subsystem is programmed to adjust the pixel data based on the ambient light level data. For example, the gain of an analog to digital converter can be increased or decreased based on the ambient light level data to adjust analog pixel data output by the imager as it is converted to digital data. If the ambient light level is high, for example, the gain can be decreased.

A method of photoplethysmography includes processing a signal (46;56) based on at least one signal (35;50) from at least one sensor (5;18-20;26;63) arranged to capture light from a living subject to extract information on a characteristic of a periodic biological phenomenon. At least one of the signals (35;50) from at least one sensor (5;18-20;26;63) is obtained by using at least one of a light sensor (1;11-13) and a filter (6;17;64) placed before the at least one sensor (5;18-20;26;63) tuned to a peak in an absorption spectrum of water.

The invention relates to a fish eye lens calibration and fish eye image distortion correction method which belongs to the field of digital image processing and is very suitable for occasions of vision navigation, mobile monitoring and so on. Since imaging using a large wide angle will cause serious distortion, generally, imaging correction is needed to facilitate human eye observation. The method provided by the invention is mainly technically characterized by establishing a space coordinate system 1 and employing a least square curve-fitting method to calibrate a fish eye image to determine the center andthe radius of a fish eye lens, establishing a cylindrical projection model in a space coordinate system UV, and setting one-to-one relationships among an image point q2 of the fish eye image, a point q1 on object sphere and a point q projected on a cylinder, wherein q1 is in vertical projection relation with a bottom plane on which q2 is located and line q1q parallels to line oq2, thus achieving the purpose of fish eye image correction.

The present invention relates to a method for controlling an illumination device (100), the illumination device (100) comprising a flux sensing unit (101) and at least two differently colored light sources (102, 103, 104), the method comprising the steps of switching on and off each of the light sources according to a predefined pattern, acquiring measurement values by means of the flux sensing unit at predetermined intervals in accordance with the predefined pattern, calculating a color point for each of the light sources based on the measurement values, calculating a difference between the color points and corresponding reference color points, and adjusting an analog current drive level of the light sources, wherein the difference is minimized such that a desired color is obtained. The present invention provides for the possibilities to in a more accurate way correct for the color changes due to change in drive current, temperature, and aging effects. Furthermore, the control method according to the present invention does not require a factory calibration, or knowledge of batch specific binning information, for obtaining the current or temperature related characteristics of the light sources, which significantly reduces the cost normally related to factory calibration and batch specific binning information. Furthermore, the present invention relates to an illumination device (100) comprising means for performing such a method.

The invention discloses a high-load and high-precision pneumatic force measurement device and a measurement method. An internal balance tail-supported aerial vehicle model is adopted to execute pneumatic force test in the prior art, and rising force of an aerial vehicle perpendicularly works on a cantilever type tail rod, so that the model severely shakes during the test. The high-load and high-precision pneumatic force measurement device comprises a balance and a supporting rod, wherein the balance adopts an internal balance and is connected with a balance sleeve; the supporting rod is connected with an incidence angle sliding rail mechanism, a side sliding angle mechanism connected with the incidence angle sliding rail mechanism, and a mechanism control and data acquisition device; the supporting rod is adopted to be connected with the balance and support the model; the internal balance is adopted to measure the pneumatic force of the aerial vehicle model; the balance is externally connected with a sleeve structure and is also connected with a data acquisition device; the data acquisition system obtains the pneumatic force on the model and is connected with automatic control equipment; therefore, the pneumatic force on the model can be obtained. The high-load and high-precision pneumatic force measurement device and the measurement method are used for measurement in a pressurized high-density and low-speed wind tunnel.

The invention discloses a frequency offset compensation method, which comprises the following steps that: a base station performs frequency offset estimation on received uplink signals to obtain a frequency offset estimation result, and pre frequency offset compensation is performed on downlink signals according to the frequency offset estimation result; a terminal detects the frequency of the received downlink signals after the frequency offset compensation, the emission frequency of the uplink signals is determined according to the detected frequency of the downlink signals, and the uplink signals are emitted in the determined frequency; and a terminal side performs the pre frequency offset compensation by the same method. The invention also discloses a frequency offset compensation device, which comprises a frequency offset estimation module, a pre frequency offset compensation module and a frequency detection and frequency modulation module. The method and the device can effectively reduce the frequency offset of uplinks and downlinks, perform the frequency offset compensation of the uplinks and the downlinks, and not only reduce the relative frequency offset between the base station and the terminal, but also reduce frequency jump variable when the terminal switches between the base stations, so that both the base station and the terminal can correctly correct the receivedsignals to ensure communication quality.

An image blur correction device according to the present invention includes an a base (100), a movable holding member (120), a support mechanism configured to movably support the movable holding member within a plane vertical to an optical axis of the lens, a driving means for driving the movable holding member within the plane, a position detecting means, and a return means for returning the movable holding member to a pause position in a pause state, the driving means includes a drive magnet (131, 141) fixed to one of the base and the movable holding member and a coil (132, 142) fixed to the other of the base and the movable holding member at a position where the coil faces the drive magnet, and the return means includes a return member (171, 172) consisting of a magnetic material or a magnet fixed to the other of the base and the movable holding member so as to face the drive magnet to form a magnetic force flow for returning to the pause position. As a result, simplification of the structure and a reduction in size and thickness of the device can be achieved, and a lens for correction can be automatically centered.

In a machine tool controlled by using a numerical control device, a correction amount is determined for thermal displacement due to heat generation and heat conduction in a spindle motor and a feed shaft motor, in addition to thermal displacement due to heat generated by rotation of a spindle and a feed shaft. A tool position is corrected based on the correction amount. An entire stroke of the feed shaft is divided into a finite number of sections, and for each section, a correction amount for thermal displacement due to axial movement of the feed shaft is determined. The tool position is corrected based on the determined correction amount.

A color shift correcting method for correcting a color shift due to misregistration of images in different colors, where a multi-color image is formed by developing latent one-color images written onto respective image carriers by an optical writing device, and directly or indirectly transferring developed one-color images onto a movable element, said method comprising the step of: adjusting a position at which one of said image carriers is irradiated with an optical beam in a sub-scanning direction to correct said color shift while said optical beam is irradiated from said optical writing device onto said image carriers to develop the latent one-color images.

Timers of a plurality of slave units are synchronized with a timer of a master unit by a) sending a synchronization message on the first network by the master unit, which contains a time measurement of the master unit and a time scale, to the slave units; b) at each slave unit, forming the difference between a time measurement recorded in the slave unit and the time measurement received by the master unit, and correcting the current time measurement of the slave unit by this difference, and, at each unit, the recording of a time measurement upon receipt of the time scale; c) at the master unit, inserting the recorded time measurement into a subsequent synchronization message.

A method and apparatus of correcting geometric information and providing a panoramic view. In the method of providing a panoramic view, a tilting vector (X′, Y′) is generated by applying matrices H(a,b) and HF to a source image vector (X,Y). The matrix H(a,b) is defined by distortion angles “b” towards a plane direction and a distortion angle “a” towards a depth direction of the source image, and the matrix HF is defined according to a camera parameter matrix K. Also, a two-dimensional vector (x,y) of a source image is converted into a three-dimensional vector (X,Y,W) on a retinal image plane having a unit radial distance from an origin of a ground plane. Also, a warped image width (WIW) is estimated from a width and a field of view (FOV) of the source image. A warping vector (x′,y′) is generated based on the converted vector (X,Y,W) and the WIW.

A photographic apparatus with an image correction function is provided, in which even if an image has a large distortion at its peripheral area, the lens distortion is suitably corrected and the image distortion is small in spite of an image having a wide field of view. The apparatus comprises a photographic lens section 10 able to adjust photographic parameters, a photographic parameter detecting section 20 for detecting the photographic parameters of the photographic lens section 10 during photographing, a photoreceptor section 30 for receiving the image information formed by the photographic lens section 10, and an image correction section 50 for receiving an image signal from the photoreceptor section 30, and for performing distortion correction of the information signal based on a predetermined calibration parameter corresponding to the photographic parameter detected at the photographic parameter detecting section 20.

A method for enumerating white blood cells and nucleated red blood cells. The method comprises the steps of:(b) providing a lysed sample of whole blood;(b) introducing the lysed sample to a light-scattering multi-angle depolarizing flow cytometer;(c) removing depolarizing interference, e.g., lipid droplets and other measured particles;(d) differentiating nucleated red blood cells and noise from white blood cells in the absence of depolarizing interference;(e) differentiating nucleated red blood cells from noise in the absence of depolarizing interference and white blood cells; and(f) differentiating possible platelet clumps.

The invention discloses a focusing positioning method based on an initial laser processing position. In the method, a beam emitted by a laser is projected on the surface of a work piece to be processed to form a light spot through the optical system of the laser processing head, light spot images are promptly collected through moving the laser processing head and using a camera, the properties of the light spot images are then compared with a computer to find out a light spot image on a focal plane, and then the laser processing head is moved according to the moving distance of the laser processing head corresponding to the light spot image, thereby completing the focusing; and the position relationship between the center of the initial processing point and the center of the light spot is determined by the computer, and the laser processing head is moved according to the position relationship, thereby obtaining the accurate positioning of the initial processing position. Compared with the prior art, the invention has high accuracy in focusing and positioning of the initial processing position, and can satisfy finishing requirements. Simultaneously, the invention also discloses a laser processing device, which has the functions of auxiliary focusing and positioning, thereby facilitating the laser processing operation.

An optical scanner includes a light source unit configured to emit light; an optical system configured to cause the light emitted from the light source unit to scan an object so as to form an image on the object; and a control unit configured to control the light source unit. The light source unit includes a plurality of light emitting units arranged in a sub scanning direction, and the control unit controls the light source unit to emit light at different positions on the object by using either n (n: positive integer) light emitting units or n+1 light emitting units selected from among the plurality of light emitting units, according to a positional shift amount of the image in the sub scanning direction.

Projector has projection optical system for projecting an image onto a projection surface and optical zoom mechanism for actuating projection optical system to enlarge and reduce the image projected onto the projection surface. Projector also has distortion correcting circuit for correcting distorted quadrilateral projected images, which are projected onto the projection surface along an optical axis that is oblique vertically and horizontally to the projection surface, into respective square corrected images, zoom setting detector for detecting a zoom setting of optical zoom mechanism, and CPU for generating corrective data to be set in distortion correcting circuit based on the zoom setting detected by zoom setting detector.