972 results about "Level line" patented technology

The disclosed invention reduces the power consumption of a liquid-crystal device. A shift register section includes DX selection circuits and shift registers, which are divided into blocks. An X clock signal is supplied to a block in which the image data values do not match between horizontal lines which are adjacent in a data time-series manner, and is not supplied to a block in which the image data values match. In addition, for the block in which the image data values match, the image data, which forms time-division data becomes non-active, and the previous data value is maintained. For this reason, it is possible to reduce electric power for driving an X clock signal supply line and an image data supply line.

A flight instrument displays azimuth information in combination with horizon information and other optional information such as altitude and/or airspeed. Azimuth information is displayed using an elliptical pattern placed below a horizon line displaying horizon information. The horizon information may be based on gyro enhanced vertical speed and/or vertical axis information. The elliptical pattern may be representative of a horizontal circular heading indicator viewed from above and behind the circular indicator. In one embodiment, the elliptical azimuth pattern moves in response to movement of the horizon line to maintain position below the horizon line. Airspeed and/or altitude information may be displayed at the sides of the screen area using a circular arc display pattern

A two-dimensional fast Fourier transform is carried out on a block of sample points by executing a one-dimensional fast Fourier transform on all vertical lines of sample points, storing the resulting values at one or more specified positions in each vertical line in an internal buffer, and then executing a one-dimensional fast Fourier transform on each resulting horizontal line of transformed data. This entire process is repeated, the specified positions being changed at each repetition, until all horizontal lines have been processed. The necessary amount of buffer memory is reduced because the internal buffer only has to store intermediate results for a limited number of horizontal lines.

The invention provides a real-time lane line detection method. According to the real-time lane line detection method, an interested area is determined through the position of a current frame vanishing point, and an upper half image where no lane lines exist is removed, and therefore, the processing time of each frame of image can be decreased; edge point scanning is performed at two directions from inside to outside of the interested area, and what is detected every time is the inner side of a lane line which is most adjacent to vehicles on a lane, and except for the interference of other edge points, jigger will not be generated because of the width of the lane line, and since an image is divided into two half parts of detection lane lines from the position of the vanishing point, a situation that two detected straight lines are located at one side of the vanishing point when the entire image is detected can be avoided, and thus, the accuracy of the detection can be improved; and further, when Hough transform lane line detection is performed, only straight lines in a range of straight lines which can form a certain included angle with a horizontal line are selected, and therefore, the accuracy of the detection can be improved, and time for calculating Hough weight of straight lines that are not in the range of the straight lines can be saved. With the real-time lane line detection method of the invention adopted, lane line detection at highways and rural areas where roads are in good condition can be realized rapidly, accurately and stably.

The disclosed method and system may be used for creating advanced protection means for various categories of documents (e.g. bank notes, identity documents, certificates, checks, diploma, travel documents, tickets) and valuable products (e.g optical disks, CDs, DVDs, CD-ROMs, prescription drugs, products with affixed labels, watches) hereinafter called “secure items”. Secure items are authenticated by shape level lines. The shape level lines become apparent when superposing a base layer comprising sets of lines and a revealing layer comprising a line grating. One of the two layers is a modified layer which embeds a shape elevation profile generated from an initial, preferably bilevel, motif shape image (e.g. typographic characters, words of text, symbols, logo, ornament). In the case of an authentic document, the outline of the revealed shape level lines are visual offset lines of the boundaries of the initial bilevel motif shape image. In addition, the intensities, respectively colors of the revealed shape level lines are the same as the intensities, respectively colors of the lines forming the base layer sets of lines. By modifying the relative superposition phase of the revealing layer on top of the base layer or vice-versa (e.g. by a translation or a rotation), one may observe shape level lines moving dynamically between the initial bilevel motif shape boundaries and shape foreground centers, respectively background centers, thereby growing and shrinking. In the case that these characteristic features are present, the secure item is accepted as authentic. Otherwise the item is rejected as suspect. Pairs of base and revealing layers may be individualized by applying to both the base and the revealing layer a geometric transformation. Thanks to the availability of a large number of geometric transformations and transformation parameters, one may create documents having their own individualized document protection. The invention also proposes a computing and delivery system operable for delivering base and revealing layers according to security document or valuable product information content. The system may automatically generate upon request an individually protected secure item and its corresponding authentication means.

A navigation system constructed from a portable terminal device having a route search server provided with route search means for searching for a guidance route from a start point up to a destination; GPS receiving means for positioning a current position; imaging means; and display means for displaying, along with a peripheral image captured by the imaging means, a guidance route, a guidance image in the direction of advance, or an image representing a place of interest. The portable terminal device further has display control means for controlling display of the peripheral image displayed on the display means. The display control means controls the position of display of the peripheral image, captured by the imaging means, so that the center of optical axis of the imaging means is below the center of the display screen. Even if the direction of the optical axis of the imaging means is directed downward from a horizontal line, the horizontal direction of the peripheral image is displayed on the display screen.

A graphics system that is configured to synchronize a slave display channel to a master display channel may include a master display timing generator configured to provide a frame event indication and a slave display timing generator. The slave display timing generator may be configured to receive the frame event indication and, in response to receiving the frame event indication during its active display period, the slave display timing generator may be configured to wait until its current active display period ends and then jump to its synchronization point. Alternatively, the slave display timing generator may be configured to jump to its synchronization point immediately or after the end of the current horizontal line, and any remaining display information in an interrupted frame may be displayed during the next active display period.

The invention discloses a portable document format (PDF) document form identification method. The method comprises the steps of acquiring character sets in a page, combining the character sets in rows, and establishing a row set; extracting horizontal lines and vertical lines in a page path, and establishing a line set; detecting suspected form titles in the row set and suspected form lines in the line set; if both the suspected form titles and the suspected form lines exist, identifying the form by using a region growth method based on the form titles and the line set; if only the suspected form lines exist, firstly detecting an all line form and then detecting a three line form by using the line set and the row set; if only the suspected form titles exist, identifying the form by using a region growing method based on the form titles and the row set; if neither the suspected form lines nor the suspected form titles exist, determining that the page has no form; and detecting form attached elements like a form header, form notes and so on, and outputting a form identification result of the page. According to the method, the form title, form lines and form character arrangement characteristic are deemed as three characteristics of the form, and the form can be located accurately in a complicated page layout with multiple forms on one page by adopting the method of regional parallel growth.

On a panel, a plurality of PVDD lines, each of which corresponds to a horizontal line of pixels and supplies power to the pixels of the horizontal line, are provided. A voltage drop correction unit that obtains a voltage drop before reaching the pixel, based on resistance in the plurality of power supply lines and currents flowing therein, and corrects display data so as to cancel the obtained voltage drop of the pixel. A display unevenness correction unit that corrects uneven brightness caused by a variation in a TFT characteristic of the pixel by performing a calculation using display data of the pixel and obtained correction data of the pixel.

A simultaneous localization and map building (SLAM) method and medium for a moving robot is disclosed. The SLAM method includes extracting a horizontal line from an omni-directional image photographed at every position where the mobile robot reaches during a movement of the mobile robot, correcting the extracted horizontal line, to create a horizontal line image, and simultaneously executing a localization of the mobile robot and building a map for the mobile robot, using the created horizontal line image and a previously-created horizontal line image.

This method implements a transition from i) moving state in which the drone is flying at speed and tilt angle that are not zero to ii) hovering state in which the drone has speed and tilt angle that are both zero. The method comprises: a) measuring horizontal linear speed, tilt angles, and angular speeds at the initial instant; b) setting stopping time value; c) on the basis of initial measurements and set stopping time, parameterizing a predetermined predictive function that models optimum continuous decreasing variation of horizontal linear speed as a function of time; d) applying setpoint values to a loop for controlling motors of the drone, which values correspond to target horizontal linear speed precalculated from said parameterized predictive function; and e) once hovering state has been reached, activating a hovering flight control loop for maintaining drone at speed and tilt angle that are zero relative to the ground.

The invention discloses a method for testing ground load calibration of an airplane wing and a special device for ground load calibration of the airplane wing. The method comprises the following steps: 1, calibrating a coordinate system, setting an intersection point of a horizontal line of an airframe structure of the airplane and a zero bit line as the original point of the coordinate system toensure that an X axis is coincided with the horizontal line of the airframe structure of the airplane and is positive afterwards, an Y axis is in a symmetric surface of the airplane and is positive upwards, and a Z axis points at the left wing of the airplane and forms a right-handed system with the X axis and the Y axis; 2, supporting a main undercarriage of the airplane on the ground, supportinga front undercarriage of the airplane on a platform, maintaining the wing in a horizontal state, and leading a fore flap, a tailing flap and a flap to be in the horizontal state; 3, applying restraint load to left and right horizontal stabilizer shafts of the airplane; and 4, selecting load points of the wing, applying calibration load to the selected load point of the wing, and acquiring the value of the calibration load. The method realizes field ground load calibration of the airplane wing.

An apparatus for processing passive acoustic signals received on a horizontal line array that were either emitted from an underwater object or echo returned from an object, is proposed to track the motion (bearing change and range change) of an object (target) relative to the receiver horizontal line array. Adaptive array processing for a moving object is biased for a moving source when the number of data samples is limited by the stationariness condition. Motion compensation can be carried out in the beam domain by beam shifting for a bearing changing object and frequency shifting for a range changing object. The method includes receiving acoustic signals from the target, determining the beam covariance matrices, determining the target bearing rate and range rate, processing the beam covariance matrices by compensating for the target motion, and producing a beam power plot versus time. Interference signal is suppressed when the interference source does not have the same motion (bearing and range rate) as the target. The method does not need detailed environmental acoustic information of the sound channel normally required to model the sound propagation.