30results about How to "Guaranteed Distortion" patented technology

The invention discloses a backlight control method. The backlight control method comprises the following steps of acquiring the maximal gray value of each area in the current video image and the ambient brightness value of the current environment; acquiring the average gray value of each area; determining the weighted values of the maximal gray value, the average gray value and the ambient brightness value, and calculating first weighted average values of the maximal gray value, the average gray value and the ambient brightness value; determining a backlight adjustment value of each area basedon the first weighted average values; and sending the backlight adjustment value to a backlight control circuit, so that the backlight value of each area is regulated. The invention further disclosesa backlight control device and a computer readable storage medium. According to the technical scheme of the invention, the first weighted average values of the maximal gray value and the average grayvalue of each area and the ambient brightness value are calculated, thus the backlight adjustment value is determined, the backlight crosstalk of the close regions and the influences of ambient lightduring backlight adjustment are reduced, and the adjusting effect of backlight brightness is enhanced.

The invention discloses an adaptation method and device for display of a web application. The adaptation method for display of the web application comprises the following steps that a virtual window used for displaying a Web page is established on a mobile terminal, and the width resolution ratio of the virtual window is set to be a fixed value; a picture is loaded, the width resolution ratio of the picture is set to be the same as that of the virtual window, and the equal-proportion zooming is conducted on the picture till the width of the image is the same as that of the virtual window; the picture is set to be the background and is displayed in the virtual window. According to the adaptation method for display of the web application, the virtual window with the width resolution ratio being the fixed value is established in the mobile terminal to be used for displaying the Web page, in this way, it is guaranteed that the Web page in the web application of the mobile terminal is displayed consistently, and deformation of the page is avoided; the picture is loaded, the width resolution ratio of the loaded picture is set to be the same as that of the virtual window, the width of the loaded picture is the same as that of the virtual window, then the picture is set to be the background to be displayed, and thus it is guaranteed that distortion does not occur during displaying and user experience is not affected.

A single-phase five-level power factor correction circuit based on a hybrid H bridge comprises switching tubes Q1, Q2 and Q3. One side of an alternating-current power supply Vs is connected with an anode of a diode D1 and a cathode of a diode D2, and a connection node forms an end point b. The other side of the alternating-current power supply Vs is connected with one end of an inductor L, the other end of the inductor L is connected with the anode of a diode D3 and the cathode of a diode D4, and connection nodes form an end point a. The drain electrode of the switching tube Q3 is connected with the cathode of the diode D1, the cathode of the diode D3, the anode of the diode D7, the drain electrode of the switching tube Q1 and a connection node to form an end point c. The source electrodeof the switching tube Q3 is connected with the anode of a diode D2, the anode of a diode D4, the cathode of a diode D8 and the source electrode of a switching tube Q2, and the connection node forms anend point d. The source of the switching tube Q2 is connected with the drain of the switching tube Q1, and the connection node forms an end point n. The cathode of the diode D7 is connected with oneend of the capacitor C1, and a connection node forms an end point p. The negative electrode of the capacitor C2 is connected with the anode of the diode D8 and the connection node forms an end point m. And the endpoint a, the endpoint c, the endpoint d and the endpoint n form four ports of the hybrid H-bridge network structure. The circuit structure has the advantages of low cost, high reliability, simple control system design and the like.

The invention relates to a distributed transmission method for a ubiquitous-mobile-network-based emergency communication system. In the method, a local emergency command center performs scheduling according to resource sensing information transmitted back by a plurality of emergency communication terminals accessing a ubiquitous network on an emergency communication scene, and the emergency communication terminals are aggregated at the remote emergency command center after transmitting own data packets according to scheduling information to realize the distributed transmission of an emergency communication scene video stream. By the method, the high-speed and real-time information transmission of the emergency communication scene can be ensured under the conditions of large commercial network user number and heavy load on the emergency communication scene.

The invention discloses a distortion correction algorithm for an optical system of an all-view 3D measuring instrument. The algorithm comprises the steps as follows: 1, establishment of a distortion relation: constructing a mapping relation between coordinates of a standard image and coordinates of a distortion image and generating a distortion correction coefficient file or a distortion correction form file; 2, correction of the distortion image: correcting the input distortion image by using the generated distortion correction coefficient file or a distortion correction form file to obtain a corrected standard image finally. With the adoption of the algorithm, stereo measurement errors caused by image distortion because of optical lens manufacturing and adjustment errors can be effectively reduced, the angle measuring accuracy of the system is greatly improved, and the problem that measurement errors are produced due to the fact that lens distortion reduces geometric position accuracy of objects in images is solved.

The invention relates to a far-infrared long-wave far-shot and high-fog-permeability athermal lens and a manufacturing method thereof. The athermal lens comprises an optical system. The optical system comprises a front group of lenses and a rear group of lenses which are sequentially arranged along the incident direction of light rays. The focal power of the front group of lenses and the focal power of the rear group of lenses are both positive. The front group of lenses and the rear group of lenses are crescent-shaped lenses. The athermal lens is simple in structure and convenient to use.

The invention discloses a backlight control method, and the method comprises the following steps: obtaining all pixels of each region of an image; calculating a first backlight value based on the pixels, and carrying out the threshold limiting of the first backlight value, so as to obtain a second backlight value limited by a threshold value and a third backlight value which is not limited; transmitting the second backlight value a backlight control circuit, carrying out the backlight compensation for the image based on the third backlight value, and transmitting the image to a liquid crystaldisplay screen after compensation. The invention also discloses a backlight control device and a computer readable storage medium. The method achieves the calculation of the backlight value for the backlight compensation of the image, and achieves the adjustment of the liquid crystal grids of the liquid crystal display screen, thereby improving the contrast, achieving the good restoration of the image, and guaranteeing the distortion of the image. Moreover, the method is simple.

The invention discloses a vocal intelligent recognition touch switch, which comprises a speech acquisition module for collecting speech signals, a filtering module for filtering the collected speech signals, a database module for storing standard speech commands, a speech identification module for comparing the speech signals with the standard speech commands in the database module, and an execution module for executing the corresponding command according to the recognition result of the speech recognition module. The vocal intelligent recognition touch switch and the control method thereof can improve the deficiencies of the prior art and improve the accuracy of human voice recognition.

The invention discloses a video redirection quality evaluation method based on space-time saliency classification and fusion. The method comprises the following steps: constructing a video classification model according to space-time saliency of videos, and dividing the videos into four classes according to motion information and foreground information of original videos; extracting salient information, edge features, foreground information, motion features and the like of the original video, and evaluating the quality of the redirected video by adopting four spatio-temporal indexes, namely perceptual geometric distortion, edge group similarity, time continuity similarity distortion and important target time distortion; adopting different self-adaptive weight endowing methods for different types of videos, and fusing the quality scores of the four spatio-temporal indexes to obtain the overall objective quality of the redirected video. An index weight adaptive fusion mode is adopted for the classified videos, different space-time characteristics are extracted for different types of videos, different index weight adaptive fusion methods are adopted, the characteristics of the videos are fully considered, and the performance of an objective evaluation algorithm is greatly ensured.

The invention discloses an immersion type high-resolution small-caliber optical fiber microscope objective, which belongs to the technical field of optical lenses. The microscope objective comprises afirst lens element, a second lens element, a third lens element and a fourth lens element which are sequentially arranged from an object plane to an image plane; the first lens element is a sphericalpositive lens; the second lens element is a spherical doublet lens and comprises a first lens and a second lens which are arranged in sequence, and the first lens is a negative lens; the second lensis a positive lens; the third lens element is a negative lens; the fourth lens element is a positive lens; the focal length of each lens element satisfies the following relational expression: 0.6 < f1/f < 0.9, -3.1 < f21/f < -1.3, 0.512 < f22/f < 1.892, 1.49 < f2/f < 2.5, -3.6 < f3/f < -2.4, and 0.5 < f4/f < 0.7. The objective of the invention is to solve the technical problems that the optical aperture of a conventional optical fiber microscope objective is not small enough, and small distortion cannot be realized while the imaging quality is ensured.

The invention discloses a programmable intelligent rail polishing vehicle which comprises a frame and a CNC control mechanism arranged on the frame. The frame is erected on a rail through rail runningwheels arranged at four corners of the bottom, a running driving servo motor is further arranged on the frame, and the running driving servo motor is in driving connection with one of the two rail running wheels on the right side of the bottom of the frame. The CNC control mechanism comprises an adjusting mechanism, a polishing mechanism and a span automatic adjusting mechanism. According to theprogrammable intelligent rail polishing vehicle, the adjusting precision is high, no deviation is caused after position adjustment, the polishing quality is good, performance is stable, modular designis adopted, detachable connection is extensively adopted, disassembly and assembly can be rapidly achieved, rapid rail entering and exiting can be achieved due to the rapid assembly and assembly function, it is effectively ensured that rail traffic is smooth in case of emergency, potential safety hazards are completely eradicated, meanwhile, and adjustment can be rapidly carried out when the railspan is changed.

The invention relates to a power distribution terminal based detection method and system, and aims at providing the detection method and system needless of separating the three-phase voltage collecting input end from the system control power input end before detection. The detection method comprises that a signal command input from the external is received; the power of a received signal is amplified; and the processed signal is output. The integral power distribution terminal is detected, the method and device satisfy onsite application more, the practical condition of the voltage signal canbe detected more accurately during operation of the terminal, and the method and system are suitable for the power field.