39 results about "Scale transition" patented technology

It aims to prevent occurrence of gradation jump or color displacement even if a process for improving a brightness distribution of a digital image to be processed is performed. An image processing method for achieving such prevention comprises: an extraction step of extracting a brightness component from image data; a scale conversion step of obtaining a distribution of the brightness component on relatively large scale; an improvement step of improving the brightness component distribution of the image data by using the brightness component and an output in the scale conversion step; and a gradation compression step of judging whether or not the image data reconstituted according to the improved brightness component distribution is within a predetermined color gamut, and, when it is judged that the reconstituted image data includes the image data outside the predetermined color gamut, of performing a gradation compression process.

The invention relates to a method for reducing a fade zone by a twin camera monitoring system on a movement platform. When the movement platform loaded with the twin cameras generates the relative position changes with a target area, the method controls the angle and direction of the twin cameras based on the principle of the heterodromous motion of human eyeballs to cause that the target area is always in the public field of view of the twin cameras, thus obtaining the three dimensional depth information of the target area. In the method, after a sensor measures the movement parameters of the movement platform, A / D conversion, digital filtering, calibration conversion, and controlling operation are carried out on the parameters by a camera control unit, and then when a motor of a camera holder compensates the movement of the platform, the angle and direction needing to be rotated is obtained. A control signal drives the rotation of the motor of the camera holder on the movement platform by a serial port. By using the method for simple operation, the motor of the camera holder can be controlled to rotate according to a corresponding direction in a certain speed and the blind zone caused by the movement of the system loading with the camera platform is eliminated.

The invention discloses a hierarchically porous molecular sieve supported metal catalyst, a preparation method thereof and application thereof in grease hydrodeoxygenation. The catalyst comprises a hierarchically porous molecular sieve serving as a supporter and a metal supported by the hierarchically porous molecular sieve; the supporter is a micro-mesoporous composite molecular sieve; the supported metal is one or more of nano-scale transition metals Fe, Co and Ni; and the transition metal is loaded on the supporter in a manner of high supported quantity and high dispersion. The porous molecular sieve supported metal catalyst has the advantages of high activity, long service life, strong inactivation resistance, strong carbon deposition resistance and the like. The production process is simple, environmentally friendly and efficient, the catalyst has strong adaptability to grease raw materials, the quality of a diesel oil product is high, and the catalyst is low in preparation cost, is suitable for industrialized large-scale production and has a wide application prospect.

Disclosed are an electrophoretic display apparatus and a method for driving the same, which facilitate minimization of the flickering of the screen as well as minimization of the unintended gray scale transition caused by the neighboring cells. Disclosed also is a method for measuring the image stability of an electrophoretic display apparatus which allows a user to visually recognize any unintended gray scale transition that may occur after a predetermined time passes without a data voltage supplied and to identify whether the degree of the unintended gray scale transition exceeds an allowable range. When an image switching is performed, no data voltage is supplied to a first cell to be maintained with a first gray scale without gray scale transition, and a data voltage of a predetermined waveform is supplied to a second cell to be maintained with a second gray scale without gray scale transition.

An object of at least one embodiment of the present invention is to provide a liquid crystal display device and a driving method thereof, in which a contour of an image is clearly recognized during movie display even in a case where a backlight is turned on and off so as to change intervals at which the backlight turns on. In at least one embodiment, the liquid crystal display device includes a liquid crystal panel and the backlight that irradiates the liquid crystal panel with light, one frame period including a turn-on period during which the backlight turns on and a turn-off period during which the backlight turns off, luminance being changed by changing turn-on intervals of the backlight, the turn-on intervals of the backlight being changed by changing lengths of the turn-on period and the turn-off period. The liquid crystal display device further includes an OS process circuit for controlling a drive voltage to be applied to the liquid crystal panel by setting an amplitude of the drive voltage to be applied to the liquid crystal panel during a gray scale transition. The OS process circuit sets the amplitude of the drive voltage to be applied to the liquid crystal panel during the gray scale transition so as to be greater as the turn-on period of the backlight is longer under a condition where gray scales that have not been subjected to a gray scale transition is equal to gray scales that have been subjected to the gray scale transition in a case where the turn-on period of the backlight varies.

The invention relates to an ordinary constant flow source driving chip-based method for controlling grey scale display of a light-emitting diode (LED). In the method, gray scales, which are scattered in two different refreshing periods and only account for a half of output enabling (OE) subfield time, of an image in the same frame period are integrated into one refreshing period and gray scales which are scattered in four different refreshing periods and only account for a quarter of the OE subfield time are integrated into one refreshing period, namely, gray scales, which are scattered in N different refreshing periods and only account for one Nth of the OE subfield time, in the same frame period are integrated into one refreshing period so as to form a complete OE subfield and make full use of the subfield time. Under the control of a specific algorithm in a control system, an ordinary constant flow source driving chip can meet all requirements and achieve the effects of high refreshing rate, high gray scale, high picture quality, high LED utilization ratio and smooth gray scale transition, so that the raw material cost of LED display equipment is saved. Certain performance of the ordinary constant flow source driving chip controlled by the method is even superior to that of a built-in pulse-width modulation constant flow source driving chip.

Disclosed is a liquid crystal display device (1) provided with a backlight part (3) that has a light-emitting diode (light source), and a liquid crystal panel (display part) (2) that includes a plurality of pixels (P) and displays information using illumination light from the backlight part (3). A video generating device (control part) (9) decides, in a frame in which a gray-scale transition occurs, at least a length of either an OFF period of the light-emitting diode in a first half of the frame or an ON period of the light-emitting diode in a latter half of the frame, based on the time information from the time information generating part (26), and outputs an instruction signal to a light source driving part (14) in accordance with the decided OFF or ON period for driving the light-emitting diode.

The invention discloses a transition metal tin compound / graphene composite material which consists of a nano-scale transition metal tin compound and grapheme, wherein a general formula of the transition metal tin compound is MSn2 or M3Sn2, M represents VIII transition metal elements. As the dispersion and loading effects of the grapheme can be uniformly distributed, the stability of the transition metal tin compound in the composite material in the process of charging and discharging can be effectively improved, and the transition metal tin compound / graphene composite material can be used as a cathode material of a lithium ion battery. The invention also discloses a preparation method of the composite material through a one-step hydrothermal method or a one-step solvent thermal method which has the advantages of simple process, low cost, short cycle, low energy consumption and the like.

The present invention provides a liquid crystal display panel Mura compensation optimization method and system. The method comprises the steps of: performing detection of received original frame datasignals and determining whether the input original frame is a gray-scale transition frame or a single gray-scale value frame, and when it is determined that the original frame is the gray-scale transition frame or is not the single gray-scale value frame, closing an Mura compensation function. The liquid crystal display panel Mura compensation optimization method and system can avoid the phenomenon of abnormal display caused by Mura compensation in a special frame which is the gray-scale transition frame or is not the single gray-scale value frame so as to optimize the Mura compensation effectof the liquid crystal display panel.

A display method of an embodiment (i) determines a suitable length of an off period of an LED in accordance with a gray scale transition time, i.e., a time during which a transmittance of a liquid crystal is being changed, and (ii) turns off a light source for the determined length of the off period in a first half part of a one frame period. This makes it difficult for a halfway change in a gray scale transition to be reflected in a brightness of a pixel. Also, by performing a gray scale transition emphasis process to a display signal when the gray scale transition is caused, it is possible to increase the brightness of the pixel in the midst of the gray scale transition and to reduce a response time of the pixel. As such, it is possible to further improve a quality of moving image display.

The invention provides an image processing method, an image processing device and a mobile terminal. The method comprises the steps of: performing face recognition according to a color image obtainedby shooting; mapping pixels in the color image using a mapping method corresponding to a first filter if a face is not recognized from the color image; and mapping pixels in the color image using a mapping method corresponding to a second filter if a face is recognized from the color image. The pixels in the color image are mapped using a mapping method corresponding to a preset filter to obtain ablack and white image, so that the overall effect of the black and white image can be improved, the gray scale transition of the black and white image is natural, the brightness contrast of the imageis obvious, and the background and theme contrast is strong.

The invention discloses a gray scale transition adjusting method and apparatus. The method comprises: a brightness value of an adjustable gray scale on a display screen is adjusted to a preset gamma curve corresponding to the adjustable gray scale; full-gray-scale scanning is carried out on the display screen; whether the number of times of the full-gray-scale scanning exceeds the preset number of times is determined; if not, whether an abnormal gray scale exits is determined; if so, a high-grade adjustable gray scale closest to the abnormal gray scale and / or a low-grade adjustable gray scale closest to the abnormal gray scale are / or adjusted automatically and then full-gray-scale scanning is carried out on the display screen again until the abnormal gray scale is adjusted to a normal gray scale. According to the invention, a problem of non-uniform gray scale transition of the display screen can be solved and thus the gray scale transition of the display screen becomes smooth, thereby improving the screen displaying effect.

The invention provides a space-time quantitative remote sensing fusion method of an arbitrary number of sensors. According to the space-time quantitative remote sensing fusion method of the arbitrary number of the sensors, quantitative remote sensing products of the arbitrary number of the sensors are fused to generate a quantitative remote sensing product which is simultaneously provided with highest space-time resolution rates of the sensors. Firstly, necessary preprocessing is conducted on the quantitative product. Secondly, uncertainty of scale difference of the quantitative products of different sensors is expressed accurately, an M estimation theory is combined to improve intra-class fitting precision, and accordingly spectrum scale difference is expressed accurately. Thirdly, windows are formed and centered in each pixel of each highest space-time resolution rate product, a similar pixel is screened in the window, and equal-weighted factors such as the spectrum scale difference are combined to construct a space-time fusion model. Finally, a variation framework is adopted to solve. According to the space-time quantitative remote sensing fusion method of the arbitrary number of the sensors, space-time complementary information and scale transition effect among the different sensors are utilized fully, correct description scale differences such as land cover types are considered, a fusion result is enabled to be close to a real quantitative product. Meanwhile, any auxiliary data are not required, and the fusion method is easy to achieve.

The invention provides an image dithering processing method and an image dithering processing device. The method comprises the following steps of: traversing pixel points in an image to be processed along a traversal path formed by a fractal curve; performing neighborhood processing on each traversed pixel point; and determining the value of each pixel point in the image to be processed after the dithering processing by the result after the neighborhood processing, wherein the neighborhood processing includes the operation of summing the value of the currently traversed pixel point and the error value corresponding to each pixel point in the pixel point neighborhood, and each pixel point in the neighborhood is a traversed pixel point sequentially adjacent to the currently traversed pixel point on the traversal path. By using the technical scheme, certain image quality of an output image subjected to dithering processing can be ensured, for example, rich colors, continuous gray-scale transition, no dithering noise and no obvious moire and worm phenomena of the output image can be ensured; and the dithering processing complexity can also be lowered for meeting the real-time performance requirement.

The invention proposes a scanning card, an ED display screen control system employing the scanning card, and an image data processing method. Aiming at a problem of low-Bit gray scale loss in the prior art, the invention proposes a mode of enabling a rotating jitter matrix processing algorithm to be used in the function implementation of the scanning card. The mode comprises the steps: adding a Bit optimization module on the scanning card, and employing different rotating jitter matrixes for the processing of different video image data frames, thereby achieving the more complete expression ofthe information of an original video image during the conversion from high-bit-width data to low-bit-width data, reducing the impact from the unfulfilment of the low Bit of the drive chip on the grayscale expression, and enabling the gray scale transition to be smoother.

The invention discloses a truck scale transition device for a highway overload control system and an installation method of the device. The truck scale transition device comprises a guide plate I, a guide plate II and a truck scale body positioned therebetween, a connecting plate I and a connecting plate II are arranged on two sides of the truck scale body respectively, and the scale body is fixedly installed on a mobile base. When the truck scale transition device used by the highway overload control system is dismounted, it is only required to dismount the scale body on the mobile base, a truck scale used by the highway overload control system can be repeatedly used; and the surface of the scale body is provided with a square notch, a transition plate is erected in the square notch through a spring I and a spring II, and the transition plate is made to incline to a certain degree in the vehicle driving direction during weighing, so that a weighed vehicle bears certain resistance whendriving on the truck scale, and is decelerated, further the vehicle is buffered and transitioned on the truck scale, the weighing position of the vehicle on the truck scale is accurately controlled,and the weighing precision of the truck scale is improved.

The invention provides a gray scale transition frame generation method. The gray scale transition frame generation method comprises the steps that the line display effective value or the column display effective value, the maximum gray scale value, the minimum gray scale value and the transition display order number of a display panel are acquired; the line display effective value number of pixel points or the column display effective value number of pixel points of the display panel are evenly divided into the transition display order number of continuous blocks; the transition display order number of gray scale values are selected in turn from the minimum gray scale value to the maximum gray scale value; and the selected gray scale values are respectively filled in the pixel values of the transition display order number of continuous blocks in turn so that a gray scale transition frame is generated. The invention also provides a gray scale transition frame generation device. According to the gray scale transition frame generation method and device, the transition frame of any gray scale can be outputted and thickness of transition stripes is relatively uniform.

The embodiment of the invention provides a brightness compensation value obtaining method, computer equipment and a computer readable medium, relates to the technical field of display, and can eliminate the brightness contrast phenomenon. The brightness compensation value obtaining method comprises the steps of obtaining a tone component, a saturation component and a lightness component of each pixel according to an input image; counting the number of high-saturation pixels and the number of low-saturation pixels according to the saturation component and the brightness component of each pixel; judging whether the input image meets a hue offset condition or not; if yes, calculating the brightness compensation value of the low-saturation pixel according to the low-saturation pixel in the input image; and for the high-saturation pixel in the input image, judging whether a gray scale transition condition is met or not, and if not, calculating to obtain a brightness compensation value of the high-saturation pixel.

In one embodiment of the present application, a liquid crystal panel drive device includes a signal processing section for determining an output gray scale in accordance with a gray scale transition from the gray scale which is forecasted to reach by a previous response to an input gray scale and can carry out overdrive with the output gray scale. At a temperature at which a rise gray scale transition may occur in absence of a response condition does not exist for single overdrive, the signal processing section determines, as an output gray scale, a gray scale lower than a maximum gray scale with respect to a particular gray scale transition out of a rise type gray scale transition. In such a way, a display quality (especially a moving image display quality) at a low temperature can be improved.

In one embodiment of the present application, a liquid crystal panel drive device includes a signal processing section for determining an output gray scale in accordance with a gray scale transition from the gray scale which is forecasted to reach by a previous response to an input gray scale and can carry out overdrive with the output gray scale. At a temperature at which a rise gray scale transition may occur in absence of a response condition does not exist for single overdrive, the signal processing section determines, as an output gray scale, a gray scale lower than a maximum gray scale with respect to a particular gray scale transition out of a rise type gray scale transition. In such a way, a display quality (especially a moving image display quality) at a low temperature can be improved.

The invention provides a dehydration processing method of a liquid crystal display. The dehydration processing method of the liquid crystal display comprises the following steps that (1) liquid crystal is guided into a closed container, drying agents are arranged in the closed container, moisture in the liquid crystal is absorbed through the drying agents, and the water content in the liquid crystal is controlled to be under 25 ppm; (2) the dried liquid crystal is guided into a filter to carry out filtering to remove foreign matters with a large diameter; (3) defoaming processing is carried out on the filtered liquid crystal under a vacuum condition; (4) the liquid crystal after the defoaming processing is put into a liquid crystal instilling device and is poured into a substrate through a liquid crystal instillation process (ODF). Due to the fact that the liquid crystal and the drying agents make contact directly, the moisture contained in the liquid crystal can be absorbed quickly, compared with an existing dehydration process, the moisture in the liquid crystal can be absorbed more efficiently in the direct contacting mode, efficiency of dehydration is improved, manufactured liquid crystal displayers are made to have a stable Gamma value by controlling the water content in the liquid crystal, and difference between gray scale transition and normal display is reduced.

The invention discloses a method and device for adjusting gray level transition and color of a display device. The method includes the steps that when any debugging gray level is adjusted, preferably, the target chromaticity brightness, a target brightness coefficient group, the current brightness chromaticity and a current brightness coefficient group which correspond to the debugging gray level are acquired, an adjustment relative brightness group is calculated according to a current relative brightness group, the target brightness coefficient group and the current brightness coefficient group which correspond to the current chromaticity brightness, a preset database is searched so that a target set value group corresponding to the target relative brightness can be determined, the debugging gray level is adjusted through the target set value group, and therefore the purpose for adjusting gray level transition and color of the display device is achieved. The technical scheme does not need to be manually adjusted and production efficiency is improved; in addition, the preset database is searched so that the target set value group can be determined, time spent in adjusting gray level transition and color of the display device is further shortened, and production efficiency is improved.

The invention discloses a digital and analog two-signal electronic accelerator and a mistake stepping prevention method of the digital and analog two-signal electronic accelerator. The electronic accelerator comprises a pedal assembly, a pair of magnetic steel, a pedal position sensor and a signal processing circuit box. The pair of magnetic steel are correspondingly arranged on a rotating shaft of the pedal assembly correspondingly and rotated along with the rotating shaft. The pedal position sensor is arranged at the position where the pedal assembly is located, and used for sensing the stroke of a pedal and outputting corresponding frequency digital signals and analog signals to the signal processing circuit box. The signal processing circuit box is used for carrying out photoelectric isolation processing, frequency measurement, scale conversion and digital-to-analog conversion on the received frequency digital signals and outputting the signals as main signals and used for removing interference on the received analog signals and outputting the signals as auxiliary signals. When the time spent by the accelerator pedal position signals from the smallest value to the largest value is smaller than a set value, the signal processing circuit box outputs idling signals as main signals, and the accelerator is prevented from being used as a brake. The digital and analog two-signal electronic accelerator is simple in structure, convenient to use and high in popularization value.

The invention discloses a method for adjusting gray-scale transition and color of a display device. By means of a preset database, the gray-scale transition and the color of the display device are adjusted, and a reference is provided for the adjustment process; compared with the manual adjustment method in the prior art, the technical scheme provided by the invention has the advantages that the time required by the adjustment process is greatly shortened and the production efficiency is improved; in addition, when the method is used for adjusting the gray-scale transition and the color of a batch of display devices, the accuracy and the uniformity for the gray-scale transition and the color of the display device are guaranteed, and the display effect of the display device is improved.