119results about How to "Does not affect image quality" patented technology

This invention relates to a dynamic random disturbance and cipher-decipher method of the video information characterizing in extracting several key data blocks for disturbance from the video information needing to be ciphered then to recover the disturbed data blocks to the extract position to be mixed with those nonkey data as the ciphered video stream to be output. The de-cipher process is similar to that. The matrix used in disturbance is dynamically generated by pseudo-random sequence, the disturbance matrixes are different to all video frames, security reaches the applied level. This invention can realize standard compressive video information cipher and decipher with hierarchy security.

The invention provides a method for realizing screen projection from a single PC screen to multiple different device screens. The method comprises the following steps of (1) deploying screen projection software on a source terminal device to realize screen audio-video data acquisition and reception of a terminal, and sending audio-video data by using an RTSP protocol through H264 standard coding compression; (2) establishing local area network communication between the source terminal device and a display terminal device; (3) providing a display operation interface by the screen projection software, and displaying a searched display terminal device list in a local area network, wherein a user can check a plurality of display terminal devices for output and display; and (4) deploying display software on the display terminal devices to realize search response to the source terminal device, and decoding, displaying and outputting the received audio-video data subjected to the H264 standard coding compression. According to the method, the purpose of projecting screen audios and videos of a terminal to a plurality of terminals for display without a forwarding server in a wireless screen projection application at present is achieved.

The invention provides a video authentication method and device. The method comprises the following steps: generating a hash code to be authenticated of a video to be authenticated, and obtaining a reference hash code of an original video of the video to be authenticated, wherein the hash code to be authenticated comprises each frame image for the video to be authenticated, a hash code of each preset region obtained by dividing the image region of the frame image and position information representing the position of each preset region in the frame image, and the generating algorithm of the reference hash code is the same with the generating algorithm of the hash code to be authenticated; for the hash code of each preset region, when the hash code of the preset region is not matched with the hash code of the corresponding preset region in the original video, determining that the preset region is tampered, and determining the tampered position of the video to be authenticated according to the position information of the preset region. The method can improve the robustness of video authentication and accurately position the tampered position.

The method comprises: in horizontal direction, the filter process is made for the inputted image; according to the scaling parameters, defining a sharpening factor; the sharpening process is made for the filtered image in horizontal direction; after processing, the image is outputted. The invention also reveals a video image enhancing device.

The invention discloses a map drawing method and device, relates to the technical field of map drawing, and mainly aims to realize map drawing through a WebGL technology and improve the map drawing efficiency. According to the main technical scheme, the method comprises the steps of obtaining map element slices according to image parameters of a to-be-drawn map; converting the intra-slice coordinates of each map element recorded in the map element slices into scene coordinates in a preset scene coordinate system, wherein the preset scene coordinate system is a three-dimensional coordinate system established based on a plane coordinate system after map projection; storing the scene coordinates and the drawing information of each map element recorded in the map element slice into a drawing data storage object, wherein the drawing data storage object is pre-created corresponding to the map element; obtaining a target image transformation matrix based on a preset scene coordinate system; and drawing the to-be-drawn map from the data stored in the drawing data storage objects corresponding to all the map elements through a preset shader in the graphic processor by utilizing the target image transformation matrix.

The invention provides a hydrate sediment CT triaxial testing device, and belongs to the technical field of geotechnical engineering foundation physical property measurement. Aiming at the deficiencyof the invention of a visualization testing device for natural gas hydrate sediment mechanical properties, the hydrate sediment CT triaxial testing device is subjected to redesigning and optimization,under the premise that the hydrate reservoir static force, the dynamic properties and the creep property can be obtained, the stability in the scanning rotating process of a triaxial apparatus, the hydrate sample temperature control accuracy and the penetrating property of X-rays of a triaxial apparatus pressure chamber are improved, the optimal CT imaging effect is obtained, and powerful hardware support is provided for the verification of the reservoir deformation mechanism in the decomposition process of a hydrate.

The invention discloses a prostate puncturing mechanism applied to an inner part of a magnetic resonance imaging machine and a working method. The mechanism comprises an outer needle rotation unit, an inner needle feeding unit and an anti-friction unit, wherein when a prostate puncturing needle is a rigid needle, friction resistance in a puncturing process can be reduced through high-frequency vibration of the anti-friction unit; and when the prostate puncturing needle is a flexible needle, rotation of the flexible needle can be controlled through the outer needle rotation unit, so that guidance and obstacle avoidance are realized. According to the prostate puncturing mechanism disclosed by the invention, by adopting a nonmagnetic or weak-magnetic material such as resin and aluminum alloys, and the prostate puncturing mechanism is not affected by a magnetic field, has a less influence on image quality and has good nuclear magnetic compatibility; and meanwhile, by adopting direct driving of nonmagnetic ultrasonic motors of a variety of forms, motion conversion mechanism is eliminated, and therefore, the prostate puncturing mechanism has the characteristics of being compact in structure, high in displacement controlling property and high in response speed.

The invention provides an unmanned aerial vehicle SAR imaging method and apparatus for an unmanned aerial vehicle SAR imaging system. The unmanned aerial vehicle SAR imaging system comprises a pre-processing end and a fine processing end. The method comprises the steps of receiving a SAR echo signal, and judging whether extraction of an azimuth pulse signal of the SAR echo signal is needed or not;extracting the azimuth pulse signal of the echo signal to generate a first pulse signal; filtering the first pulse signal or the SAR echo signal, and extracting the filtered signal to generate a second pulse signal; conducting distance FFT on the second pulse signal to generate a distance compression signal; accumulating a plurality of distance compression signals, and conducting azimuth FFT on the azimuth directions of the multiple distance compression signals to generate a preprocessing signal; sending the pre-processing signal to the fine processing end, so that the fine processing end conducts imaging processing on the preprocessing signal to generate a SAR image. By means of two-step processing of the pre-processing end and the fine processing end, the located weight and power consumption of the unmanned aerial vehicle are reduced, and the image quality is also improved.

The invention relates to the field of forest fire prevention and disaster resistance, and specifically discloses a remote forest fire prevention monitoring system and method. The system mainly comprises a monitoring terminal, a server terminal and a user terminal. The monitoring terminal collects image information and data information of a monitoring area, carries out preliminary image processingon the image information, and sends the preliminarily processed image information, data information and monitoring terminal information to the server terminal. The server side performs further image processing on the preliminarily processed image information, obtains an analysis result and alarm information, stores the data information, and sends the alarm information to the user side when the alarm information is generated. The user side extracts the data information and the processed image information, and displays an analysis result and alarm information. Through the system and the method,forest fire early warning information can be obtained more efficiently. Meanwhile, related personnel are reminded to take corresponding prevention measures in effective time, and early warning is carried out in time under the trend of forest fire occurrence conditions.

The invention relates to a photoetching projection objective environment collection control system and a control method thereof, belonging to the field of photoetching projection objective control. The photoetching projection objective environment collection control system comprises a control machine box, a collection driving machine box, an analog-to-digital conversion machine box, multiple actuators and multiple sensors, wherein an optical fiber communication board card is connected with an environmental control algorithm board card through an optical fiber transmission link; an environment collection driving board card is connected with an analog-to-digital conversion board card or an interface conversion card through a digital signal transmission link, and the environment collection driving board card is connected with the multiple actuators through a driving signal transmission link; the analog-to-digital conversion board card is connected with the multiple sensors through a low-voltage analog signal transmission link; the multiple actuators are arranged in a photoetching machine environment cabinet; the multiple sensors are arranged on a photoetching projection objective. According to the photoetching projection objective environment collection control system disclosed by the invention, the regulation time of every regulation is shortened, the accuracy of environmental parameter regulation is ensured, the response time is shortened and the integral property of the photoetching projection objective and a photoetching machine can be ensured.

The invention relates to an adaptive cold light source, which consists of a case, a power circuit board, a bulb, a light guide bundle connector, a control circuit, a cooling fan, a motor, a shading plate and a video input terminal. A video signal is connected into the control circuit; the video signal is subjected to amplification of a video amplifying circuit and analog-to-digital conversion, and then is analyzed and processed by a CPU to have a maximum value; and by using the value, a motor dimming circuit controls the motor to drive the shading plate to rotate at different angles so as to control the output light intensity through non-shading, partial shading and full shading for the output light, and the output light intensity is adaptively adjusted so as to fulfill the aim of an light-source adaptive camera for luminance requirement and provide luminance required for the camera and a photographed object.

The invention relates to the technical field of game playback, in particular to a network game recording and replaying method, includes the following steps: a game server obtains game data and scene data in the running process of the game in real time; in response to a playback request from the client, game data and scene data are stored to the client, the client reads the game data and scene data, so that game playback is realized. Compared with the traditional recording software for recording, the method in the invention does not need to occupy additional computer resources, does not affectthe game fluency of the player, has smaller storage space than the video format, does not affect the image quality for playback, and the user can choose whether to save the game data to the local client according to the need.

The invention provides a video processing method for reducing a data bandwidth. The method comprises the following steps of: when image data is processed and written back into a memory by an image processing circuit, nondestructively compressing the image data by using a nondestructive compression circuit, and writing the image data back into the memory; and when the image data is read from the memory by the next image processing circuit, decompressing the image data by using the nondestructive decompression circuit, and processing the image data. The invention also provides a video processing circuit for reducing the data bandwidth. According to the method and the circuit, a high-resolution screen can be supported under the conditions of no increase of memory frequency and no addition of memory channels, so that a bandwidth required by graphic image processing is greatly reduced.

The invention discloses an on-orbit polarization measuring system of a satellite-borne imaging spectrometer, and relates to the technical field of space optics. The on-orbit polarization measuring system solves the problem of deterioration of imaging quality due to a depolarization instrument of an existing satellite-borne imaging spectrometer. The on-orbit polarization measuring system comprises an aperture diaphragm, a telescope, an entrance slit, a collimating lens, a Brewster prism, a focus lens, a plane turning mirror and a focal plane detector. An aiming beam enters the telescope via the aperture diaphragm, and is imaged on the entrance slit via the telescope, light which exits from the entrance slit enters the Brewster prism after being collimated by the collimating lens, S-polarized light enters the focus lens after being subjected to chromatic dispersion and polarizing beam splitting by the Brewster prism, is focused by the focus lens, is turned by the plane turning mirror and then is imaged on the area focal plane detector, and the vibration direction of the S-polarized light is parallel to the length direction of the slit. The on-orbit polarization measuring system is applicable to meeting requirements of space remote sensing atmospheric sounding and ocean color exploration.

The TFT LCD driver comprises a controller to output latch pulse signal and a grid drive circuit with multiple output ports to output data level according to pulse signal and some switch devices arranged between two near output ports to conduct ports during the vertical blanking period. This invention can prevent the consumption of grid drive circuit without effect to figure quality.

The invention discloses a method of eliminating DR image static state grid shadow. The method is characterized in that a spatial convolution kernel template can be produced, and can be stored in a DR control system; the convolution of the image to be processed can be carried out by using the spatial convolution kernel to acquire the processing result image. The method is used to solve the problems of the prior art such as the quality decreasing of the medical image and the bad influence on the diagnosis of the doctor caused by the grid shadow of the prior art, and the complicated and low-reliability solution, and is advantageous in that the grid shadow can be effectively eliminated, the medical image quality can be improved, and the diagnosis and the treatment of the doctor can be better facilitated.

A coding / decoding device with watermark encipherment is prepared as forming coding device by watermark generator for generating watermark information and coder for carrying out coding according to MPEG standard and for embedding said watermark on, forming decoding device by decoder for analyzing MPEG code stream to pick watermark up and for restructuring decoded image and watermark detector used for judging whether code stream is distorted or not.

The invention discloses preparation of a hydrotalcite nanosheet/carbon array/metal/silicon combined electrode and application of the hydrotalcite nanosheet/carbon array/metal/silicon combined electrode as a non-enzymatic sensor. A substrate material is processed by combining a C-MEMS micro-manufacturing technology and a metal sputtering technology, and the surface of the substrate material is modified with nanosheet to prepare the hydrotalcite nanosheet/carbon array/metal/silicon combined electrode, and non-enzymatic electrochemical sensor is constructed for quantitative determination of glucose. By the metal sputtering technology, electrical conductivity of silicon chip is enhanced, and smoothness and flatness of the surface will not be destroyed, and imaging quality of the subsequent micromachining material will not be influenced. The C-MEMS micromachining technology can be directly applied in preparation of electrochemical devices. The nanosheet exposes more active laminates in comparison with a micron-grade layered material and is self-assembled to cover the surface of the substrate so as to increase roughness and raise catalytic activity. Electrochemical detection shows that the composite material constructed sensor can be used for accurate and quantitative determination of glucose and has good preparation reproducibility and detection stability.

The invention relates to the field of printing and particularly relates to an image printing method and terminal. The method comprises the steps of S1, obtaining a first color image corresponding to aCMYK color mode; S2, converting the first color image into a second color image corresponding to a CMY color mode; S3, obtaining a point reading code image corresponding to the second color image, wherein a color of a point reading code in the image is black; S4, synthesizing the second color image and the point reading code image to obtain a third color image corresponding to the CMYK color mode; and S5, printing the third color image. The image carrying the point reading code can be printed through utilization of a CMYK four-color printing device which is generally used by a factory.

The embodiment of the invention relates to the technical field of automation, and discloses a lens protection device. The lens protection device comprises a transparent shielding piece used for shielding a lens, an air knife component adjacent to the transparent shielding piece, and an air supply system connected with the air knife component, wherein the air supply system provides compressed air for the air knife component, and the air knife component generates an air curtain which blows to the upper part of the transparent shielding piece. The invention also provides a lens protection method.According to the lens protection device and the lens protection method, the lens can be kept in a clean state, and the lens is protected from being interfered by environmental pollution.

The invention relates to a guiding catheter with a plurality of unidirectional periosteal flap side openings, which can effectively lighten the problem of the baffle of the coronary blood flow caused by inserting the guiding catheter, can prevent the image quality form being influenced caused by the loss of a large number of contrast agents due to the existence of the side opening, can increase the use level of the contrast agents, and can overcome the defects of the relevant side effects. The guiding catheter structurally comprises a guiding catheter body. The guiding catheter is characterized in that the wall of a straight pipe body between a first elbow pipe body and a second elbow pipe body is provided with at least one side opening, and the inner walls which correspond to the side openings are provided with a plurality of unidirectional periosteal flaps. The guiding catheter is simple in structure, and the side openings are changed into the unidirectional periosteal flaps. Due to the function of the unidirectional periosteal flaps, the liquid only can flow into the inner pipe from the outer pipe, and the liquid in the pipe can not flow out of the side openings, so that the problem of the baffle of the coronary blood flow caused by inserting the guiding catheter can be lightened, and the image quality can not be influenced during radiography, therefore, the guiding catheter is particularly suitable for the backbone opening pathological changes or the conditions that the catheter which is more than 7F can be deeply inserted and the blood vessel opening convulsion is easy to incarcerate.