155results about How to "Guaranteed no distortion" patented technology

The invention discloses a deforming statistical map based multi-view spatio-temporal data visualization method and application. Spatio-temporal data having geography and time attributes is visualized by adopting a method of multi-view and multi-tag mixed layout formed by combining a traditional map, a statistical map, time axis and a pie chart, a bar graph, a bubble chart and a Nightingale rose diagram in a statistical chart, and the dissymmetry problem of data distribution and space utilization of a traditional map visualization method and the problem that the attributes of multi-dimensional data display are not comprehensively displayed are avoided. A user can be helped to understand all the aspects of data from multiple perspectives, meanwhile a classic visualized statistic analysis chart, the map time axis and the like are combined, so that data display is specific and vivid. The deforming statistical map based multi-view spatio-temporal data visualization method can be applied to the fields of data visualization of microblogs, WeChat, demographic statistics, infectious disease distribution, elector distribution and the like, and visualization and visual analysis conducted on the data having the time relation of spatial distribution are achieved.

The invention relates to a screenshot method and device, and a computer-readable storage medium. The method comprises the steps of receiving screen capture instructions; hiding a status bar in response to screen capture instructions; intercepting screen images to obtain screen images that do not contain the status bar information. By responding to the screen capture instructions, the status bar is triggered to automatically hide, interception of the screen images is conducted, and the problem that related technologies cannot directly intercept screen images which do not contain the status bar information is solved; additionally, it is not necessary to hide the status bar through an image processing technology after the screenshot, and the screen images without the status bar information can be directly intercepted; the method is convenient and fast, can reduce the processing volume, and ensures that the image ratio is not distorted.

The invention relates to a pace-making electrocardio-signal non-equilibrium deep compression method which comprises the steps of conducting rapid content sensing of pace-making electrocardio signals, and conducting non-equilibrium synergy data compression and reconstitution on representation waveforms and non-representation waveforms. According to the pace-making electrocardio-signal non-equilibrium deep compression method, in order to solve the problems that pace-making pulses and other electrocardio waveform frequencies are large in distributional difference and the weight difference exists in the representation waveforms and the non-representation waveforms in clinical diagnosis, different compression and reconstitution strategies can be used for the representation waveforms and the non-representation waveforms in a targeted mode on the premise that requirements of the Nyquist sampling theory are not met. According to the pace-making electrocardio-signal non-equilibrium deep compression method, 1/2 of the inherent frequency of pace-making pulse signals is used for sampling, compressed sensing and Huffman encoding processing are carried out on the representation waveforms in the same time window, and non-distortion sampling and Huffman encoding are carried out on the non-representation waveforms in the same time window. On the premise that non-distortion of the clinical diagnosis message is guaranteed, the compression ratio and the reconstitution accuracy of data are improved, and the reliable operation of a wireless monitoring terminal of a pacemaker is guaranteed.

Provided is a steady motion visual evoked potential brain computer interface method based on stochastic resonance enhancement. First, an electrode is arranged on the head of a user, a detected electroencephalogram signal is sent to a computer, then movement stimulating units are presented in front of the user through a computer screen at the same time, the movement stimulating units are shielded by two-dimensional noise points obeying Gaussian distribution, the noise point update frequency is synchronized with the screen refresh rate, and the noise strength is represented by Gaussian distribution standard deviation. After the movement stimulating units are formed, the user watches any one of the movement stimulating units, a computer acquires a stimulation starting flag bit and a stimulation finishing flag bit, a computer signal is acquired through a test electrode, the significance probabilities of different stimulation targets are calculated, the targets are judged and indicated through the screen, and then the next target identification is conducted. The steady motion visual evoked potential brain computer interface method based on stochastic resonance enhancement can remarkably enhance brain response strength of the user, improve precision and efficiency of an existing brain computer interface, and innovatively improve practical level of the brain computer interface technology.

The invention relates to a system for audio transmission via a wireless network, which transmits digital audio signals via a wireless network. The system includes an audio signal transmission unit and a central control unit, wherein the audio signal transmission unit receives audio signals from a piece of upper-level audio equipment, and analog audio signals are converted to digital audio signals and network data packages transmitted to the central control unit via a wireless network. The audio data is received by the central control unit and reverted to audio signals. The system further includes a piece of audio processing equipment for storing, processing or mixing audio signals.

The invention provides an information processing method and electronic equipment. The electronic equipment is provided with a display unit. The information processing method comprises the steps that when a source image or a selection frame are displayed on a display unit, the source image is zoomed; a target image is obtained after the source image is zoomed, wherein the length of one set of edges of the target image is not larger than that of the corresponding edge of the selection frame, and the blank area not occupied by the target image exists in the selection frame; according to preset rules, pixel groups in the preset range of the source image are sampled, and N pixel points are extracted as sample pixel points, wherein N is an integer larger than or equal to 1; the N sample pixel points are analyzed, and filling image blocks are formed based on the analysis result; the blank area is filled with the filling image blocks.

The invention discloses a high-gain narrowband radio frequency receiver. The high-gain narrowband radio frequency receiver includes a radio frequency front-end amplification and filtering circuit, a frequency mixing circuit, a multistage numerical control gain amplification circuit, a first-stage intermediate frequency filter, an N-stage intermediate frequency filter, an ADC matching network and an ADC; the radio frequency front-end amplification and filtering circuit is used for amplifying and filtering radio signals and inputting the amplified and filtered radio signals to the frequency mixing circuit; the frequency mixing circuit is used for performing frequency conversion on the radio frequency signals to obtain intermediate-frequency signals and outputting the intermediate-frequency signals to the first-stage intermediate frequency filter; the first-stage intermediate frequency filter is used for filtering the signals and sending the filtered signals to the multistage numerical control gain amplification circuit; the multistage numerical control gain amplification circuit is used for amplifying the signals and sending the amplified signals to the N-stage intermediate frequency filter; the N-stage intermediate frequency filter is used for filtering the signals and sending the filtered signals to the ADC matching network; and the ADC is used for converting signals outputted by the ADC matching network into digital signals. With the high-gain narrowband radio frequency receiver of the invention adopted, under a condition that blocking signals exist, a high-gain link can maintain unsaturated, sensitivity will not be deteriorated, and gain can be as high as 80db.

The invention provides a system and a method for automatically adjusting smoothness of a projection surface. The system is characterized in that the system comprises a storage unit for storing a standard corrected image; and a control unit which reads the standard corrected image from the storage unit and projects the standard corrected image on a random projection surface through a projection unit; the method comprises the steps of acquiring the corrected projection image of the standard corrected image on the projection surface through an image sensing unit; correcting the corrected projection image so that the corrected projection image is similar with the standard corrected image, thereby obtaining a correction parameter; correcting the to-be-projected image according to the correction parameter; and projecting the corrected image on the projection surface through the projection unit. The other technical solution of the invention provides a projection surface evenness automatic adjustment method based on the system. The system and the method provided by the invention can realize no distortion of the image which is projected out of the projection system without the projection surface.

The invention relates to an electronic PTZ method and device based on high-definition digital camera monitoring. High-definition digital video streaming is obtained and then decoded so as to obtain a high-definition digital video streaming frame image, then the high-definition digital video streaming frame image is subjected to electronic PTZ control so as to obtain the frame image in a reserved active window, namely the traditional PTZ holder control method is applied to image processing, large-scale scene video signal streaming can be obtained as long as the image obtained is large enough and has enough resolution, at the same time, the reserved small scene in the large-scale scene image can be selected and amplified to have reserved resolution for display so as to ensure the small scene to be distortionless, and large scene and small scene at any time can be obtained simultaneously through conducting PTZ processing on the obtained high-definition digital image information.

The invention discloses a color balance anti-blue-ray lens, glasses and equipment and a manufacturing method thereof. An all-dielectric multilayer film pile with characteristics of two selective transmission attenuation band characteristics is deposited on the front side of a lens body; a wide-band anti-reflection multilayer film pile of the visible light band is deposited on the back side; the color balance anti-blue-ray lens meet the requirements that the transmission rate at the 420nm to 450nm band is lower than or equal to 65 percent; the transmission rate at the 565nm to 595nm band is lower than or equal to 70 percent; the transmission rate at the 460nm to 555nm band is higher than or equal to 85 percent; the transmission rate at the 605nm to 700 nm band is higher than or equal to 85 percent; the transmission rate at the 300nm to 380nm band is smaller than or equal to 1 percent; the color coordinate of the integral transmission spectrum is positioned in a range (0.333+/-0.005, 0.333+/-0.05). The proper high-low-refractive-index film layer design is selected, so that the transmission attenuation can be realized in the specific high-energy blue-ray band; the corresponding attenuation compensation can be performed in the color complementation band, so that the anti-blue-ray human eye protection without color balance distortion can be realized. The color balance anti-blue-ray lens, glasses and equipment and the manufacturing method have the advantages that the structure is compact; the manufacturing process is simple; the cost is low; the large-scale production is easy.

The invention discloses a Raman spectrum based substance qualitative detection method, and relates to a substance qualitative detection method. The method comprises the following steps of S1, establishing a Raman normalized second-order spectrum library of a standard substance; S2, acquiring a mask threshold; S3, respectively establishing a spectrogram mask for each standard substance according to the Raman normalized second-order spectrum library of the standard substance and the mask threshold; and S4, judging the composition of the to-be-detected substance according to the spectrogram mask of the standard substance. The qualitative Raman spectrum library is established by using the spectrum second derivative-mask technology, the interference of fluorescence on judgement is eliminated through the processing of a second derivative, and the problem of Raman qualitativeness under the high fluorescence background is solved; and besides, the second derivative can effectively reduce the width of the characteristic peak, and the identification accuracy is improved. Database management and retrieval based on the spectrum second derivative-mask technology are more accurate, and the retrieval efficiency of the spectrum library is effectively improved.

The invention relates to an intelligent inspection system and method for a power distribution room, and the system comprises a label module which carries corresponding power distribution cabinet equipment information; an identification uploading module which is used for identifying the label module, reading the inspection content information of the corresponding power distribution cabinet, acquiring inspection point position information, receiving inspection record information input by an inspector, and uploading the inspection point position information, the inspection content information andthe corresponding inspection record information to a background processing module; and the background processing module which is used for generating an inspection report, updating the inspection report in real time and storing the inspection report. According to the invention, the label module arranged on the power distribution cabinet is identified to obtain the power distribution cabinet equipment information, and the power distribution cabinet equipment information is correlated with the inspection record information inputted by the inspector and the automatically obtained inspection pointposition information, and then is uploaded to generate an inspection report, thereby achieving the intelligent management and recording of inspection, facilitating the real-time obtaining of the state of the on-site power distribution cabinet by a background, greatly improving the inspection efficiency, facilitating the subsequent query and retrieval at any time, and bringing great convenience.

The present invention provides a beam direction switching method and device based on a microphone array, and the method comprises the steps: determining phase delay information between microphones inthe microphone array; acquiring sound source signals collected by all microphones in the microphone array; performing beam forming of the sound source signals collected by the microphones to obtain output signals of the microphone array in the preset all beam directions; determining a target beam direction from the fixed beam directions according to the energy values of the output signals of the microphone array in the fixed beam directions; switching the beam direction of the microphone array to the target beam direction. The method can select an optimal beam direction from the preset fixed beam directions according to the position of a user, can enable the determined beam direction to adapt to the mobility of the user, and improves the applicability of the method.

The invention provides a tool for detecting a high-temperature acoustic emission signal of a thermal barrier coating. The tool comprises a fixing unit, a sensor, a thermal insulation unit and a cooling unit, wherein the fixing unit is used for fixing a to-be-detected sample the surface of which is sprayed with a thermal barrier coating; the sensor is used for detecting the acoustic emission signal of the to-be-detected sample; the thermal insulation unit is connected between the to-be-detected sample and the sensor; the cooling unit is used for cooling the sensor. According to the invention, the problem that the acoustic emission sensor is limited in use temperature, and the acoustic emission signal of the thermal barrier coating at high-temperature condition cannot be detected is solved.

Present invention relates to digital power control method for enhancing data rate GSM evolution scheme (EDGE) carrier frequency. Said method adopts digital open /closed loop combined power combined power controlling means, adopting open-loop control output mode in single time slot, ensuring non distortion signal to 8PSK output power in one time slot, adopting closed-loop control output mode to multi - same power class time slot in same modulation mode, Said invention can adapt GMSK and 8PSK modulation mode with high carrier frequency output power and anti disturbance ability and stability.

The invention discloses a space-based infrared hyperspectral image intelligent compression method. The method comprises the steps that infrared hyperspectral image cubes are determined; multiple narrow bands are selected according to infrared physical characteristics of a target; the target is detected in images corresponding to the selected narrow bands; suspected targets are preliminarily screened through target infrared feature fusion; suspected targets are further screened through multi-frame track association; a central spectrum of each suspected target is acquired; a spectrum on pixels of each suspected target and the central spectrum of the corresponding suspected target are compared to determine a target region, and other regions, except the target regions, are regarded as background regions; and nondestructive compression is performed on the hyperspectral image cubes in the target regions, and destructive degree-controllable compression is performed on the hyperspectral imagecubes in the background regions. According to the method, nondestructive compression is performed on the target regions, destructive compression is performed on the background regions, and therefore non-distortion of target information is guaranteed while a high compression rate is realized.

The embodiment of the invention provides a noise reduction method and device, electronic equipment and a readable storage medium, and the method and device can be applied to the electronic equipment.The electronic equipment comprises a first sound collector and a second sound collector, and the installation positions of the first sound collector and the second sound collector are different; the method comprises the following steps of: based on a first sound signal collected by a first sound collector and a second sound signal collected by a second sound collector, determining an expected sound signal and an interference sound signal, performing coherent noise elimination processing on the expected sound signal based on the interference sound signal to obtain a third sound signal, and performing non-coherent noise suppression processing on the third sound signal according to the probability that voice exists in the third sound signal to obtain a target sound signal. The embodiment of the invention not only can effectively reduce the noise in the target sound signal, but also can effectively ensure that the voice in the target sound signal is not distorted.

The invention relates to a rain removing method and system for a single image. The method comprises the following steps: converting an RGB color image into a Lab color space unit; extracting an L channel expressing the image brightness in the Lab color space unit; carrying out rain removing processing on the L channel; combing the L channel processed by rain removing with an a channel and a b channel and converting the Lab color space unit after combination into an RGB color space unit so as to obtain an RGB color image after rain removing processing. With the method and system, the RGB image is converted into the Lab color space unit; only the L channel is processed by rain removing and the L channel processed by rain removing is combined with the a channel and the b channel; and conversion is carried out to obtain an RGB image. Therefore, rain removing processing of the single color image is realized; the image color distortion is prevented; and the usage range of the rain removing algorithm of the single image is expanded.

The invention relates to a frequency scanning method for a time division-synchronization code division multiple access (TD-SCDMA) system, which belongs to the technical field of telecommunication. The method is characterized by comprising the following steps of: firstly, determining a frequency scanning step length and the reference power and initial gain of automatic gain control; secondly, starting the initial gain from any moment; thirdly, forming a characteristic window, and determining the position of a downlink pilot time slot; fourthly, judging whether the position is switched to a next frequency point according to the step length; and finally, acquiring a main carrier frequency and a main carrier wave according to the power value of the recorded downlink pilot time slot. The main carrier frequency is determined rapidly in a sliding window way, so that hardware storage cost is reduced, and the disturbance of an auxiliary carrier wave on a frequency scanning result is solved well. In the method, the automatic gain control is combined with dynamic adjustment of reference power, so that the distortion of the characteristic window is prevented, and the main carrier wave is determined accurately.

The invention provides a real time video defogging method. According to the method, the demand for defogging performance is satisfied; the calculation complexity is relatively low and the real time performance is relatively high. The method comprises: firstly, with respect to an input foggy video image, carrying out minimum value solution on red, green and blue three channels pixel by pixel, then carrying out parallelized rapid local minimum value filtering, thus obtaining a dark channel initial image; successively carrying out blocking according to rows and columns, filtering to obtain a final dark channel image; secondly, carrying out histogram statistics, setting a dark channel threshold value, dividing the input fogging image according to the dark channel threshold value, only counting the average colors of the points with corresponding dark channel numerical values more than the dark channel threshold value as atmosphere color parameters; and finally, carrying out reverse solution according to a dark channel physical model, thus obtaining the defogged enhanced video image as the output.

The embodiment of the invention discloses a method and device for reducing PAPR based on a distortion-free initial phase sequence of a reserved symbol. According to the method, when target data is sent through OFDM, a part of reserved subcarriers are reserved in advance and specially used for bearing peak elimination signals, and after the peak elimination signals and the target data are loaded tothe subcarriers, the peak elimination signals and the target data are sent after OFDM modulation. According to the method, the peak elimination signals and the target data are borne on different subcarriers to be sent, it is guaranteed that the sent target signal is distortion-free, the stability of the signal transmission process is improved, the distortion-free target signals can be obtained only by removing the signals on the reserved subcarriers when the received signals are processed, and the implementation is easy. And on the other hand, according to the method, the initial phase is used as a peak elimination signal, another method for generating the peak elimination signal is provided, and the initial phase and other types of peak elimination signals can be superposed to obtain abetter peak elimination effect.