44results about How to "Improve real-time processing" patented technology

The invention discloses a transformer station intelligent expert system based on editable formula scripts. The transformer station intelligent expert system comprises a real-time analysis display main module, an expert knowledge base offline configuration tool module, a knowledge database module, a processing unit in which an editable formula script preprocessing layer is combined with a rule mode matching layer, a discrete event dynamic comparison unit capable of configuring effective time domains, a rule condition delay effectiveness and delay return trigger mechanism unit and a configurable 'before happening' and 'after happening' correlation site information automatic collection unit. By the adoption of the scheme, information of a transformer station monitoring system, such as the electric quantity, signals, warning and events, can be processed in a unified and comprehensive mode, an expert knowledge base can be flexibly modified and extended, the expert system can accurately and timely assists transformer station operators on duty and maintenance staff in correctly judging and processing accidents and exceptions through intelligent warning and real-time online analysis, and therefore the new requirements oriented to digital and intelligent transformer stations are better met.

The invention belongs to the technical field of SAR (synthetic aperture radar) image power line detection and particularly relates to a local Hough transform and morphological optimization SAR image power line detection method. The method specifically includes: subjecting an SAR original image to edge detection by adopting an Edison operator to obtain a binary image including edge information; dividing multiple edge belts in the binary image including the edge information; subjecting each edge belt in the binary image with the edge belt divided to straight line detection by adopting a polar-coordinate transformation space based Hough transform method to obtain a Hough transform detection result; in each edge belt of the Hough transform detection result, selecting a line segment with the longest length, if the closest range between an optional rest line segment and the line segment with the longest length is smaller than a preset range threshold and an included angle between the corresponding line section and the line section with the longest length is smaller than a preset included angle threshold, deleting the corresponding line section, and if not, retaining the corresponding line section; finally obtaining an SAR image power line detection result.

The invention discloses a real-time low-light color image enhancement method. The method includes the steps: firstly, converting an RGB color image to a YCbCr color space; secondly, subjecting a Y-component of the YCbCr color space to histogram statistics and performing histogram equilibrium processing; thirdly, performing threshold determination on Cb and Cr color components respectively, and performing nonlinear transformation on the components out of a set threshold range; fourthly, subjecting the processed YCbCr color components to inverse transformation to an RGB color space, and finally acquiring the enhanced color image. The invention further provides a device of the real-time low-light color image enhancement method. All processing procedures are implemented in an FPGA (field programmable gate array). By the method and the device, the color video images low in light can be subjected to real-time enhancement, the dynamic range of the images is expanded, contrast ratio is increased, enhancement of high-speed high-resolution video monitoring images can be realized, and visual effect of the video images is improved.

The invention discloses an apparatus for short range 3D imaging apparatus based on a MIMO system and an imaging method thereof. The apparatus includes an N x N millimeter wave receiver area array and a synchronous transmitter. The N x N millimeter wave receiver area array is composed of N millimeter wave receivers. The synchronous transmitter is composed of M transmitting antennas, wherein the M transmitting antennas are distributed in the periphery of the N x N millimeter wave receiver area array and are mutually arranged in a same plane. The beneficial effects of the invention are: a novel type of millimeter wave human body detection method for short range 3D imaging is proposed based on the MIMO system and the imaging method has the characteristics of high resolution ratio and excellent instantaneity.

The invention belongs to the technical field of star extraction, and specifically relates to a star extraction method based on energy distribution. The star extraction method comprises following steps: images are scanned successively, and grey values of the imagines are compared with threshold value S; if the grey value of an image element is larger than S, then a nearby 3X3 image element area is searched; it is determined that in the 3X3 image element area whether the grey values of p image elements are larger than T; if it is determined that in the 3X3 image element area the grey values of p image elements are larger than T, then a star centroid is extracted from a nearby 5X5 area via centroid algorithm, otherwise scanning is carried out continuously. The star extraction method is capable of increasing accuracy of star centroid extraction; simultaneous performing of the two star map dividing stages and centroid algorithm can be realized; and real-time performance of star map processing is improved.

The present invention provides a method of fast image construction. The wavelength information is extracted in advance based on characteristics of a Fourier domain Optical Coherent Tomography (OCT) system, to obtain a vector of wavelengths which are in a uniform distribution in a wave number space, and thus to obtain a virtual position coefficient of this wavelength vector at a CCD, from which a weight matrix is calculated based on a transfer function for a discrete Fourier transform with zero-padding interpolation. In operation of the system, the interpolation is carried out based on the weight matrix and collected data, or is carried out based on the weight matrix which has been truncated by being subject to windowing and the collected data, to obtain interpolated data satisfying requirements. The method according to the present invention is simple and easy to implement, by which, it is possible to improve the precision and speed of the Fourier domain OCT data process, and thus to improve the capacity of real-time image reconstruction of the Fourier domain OCT system.

The invention provides a data frame transmitting method and a receiving method based on pipelining, relates to the processing field of data frames and solves problems that the serial processing method has longer time delay and worse practicability and influences communication efficiency during the processing of data frames. The technical scheme is as follows: when the data is transmitted, the to-be-transmitted data is extracted and divided into a frame header section and a data section, and then the frame header section and the data section are data-encrypted and encoded in segments in a pipelining manner; when the data is received, the frame header section and the data section are decoded and data-decrypted in segments in the pipelining manner. With the adoption of the pipelining processing manner, the rapid processing of the data frames is realized, the processing timeliness of the data frames is improved and the actual requirement is satisfied; compared with the traditional method, the time of processing the data frames with 6 information bits in the data transmission process is saved by 8.04 milliseconds.

The invention relates to a hardware receiver and method for achieving GNSS-R phase difference extraction. The hardware receiver comprises a code phase difference fast rough measurement module, a code phase difference accurate measurement module, a carrier phase difference estimation module, and a full-phase transformation and carrier phase difference correction module. The method is based on a FPGA and a DSP, achieves reflected signal effective coherent integration by using a FIFO to perform data time delay, uses a code phase difference rough measured value as an initial computation code phase different accurate measured value of a Gauss-Newton iteration algorithm, guides carrier phase difference solution by using a code phase difference accurate measured value, computes the initial phase values of a direct signal and a reflected signal by using full-phase FFT, and corrects a carrier phase difference final result by means of the comparison of the initial phase values. A hardware device may accurately process acquired direct navigation signals and reflected navigation signals in real time and may correct a carrier phase difference measurement error caused by a reflection plane.

The invention discloses an infrared imaging apparatus and a nonuniformity processing method thereof and belongs to the infrared imaging technology field. The apparatus comprises an infrared detector signal processing module (M1), an infrared detector switching module1 (M2), an infrared detector switching module2 (M3), an infrared imaging apparatus shell fixing structure module (M4) and an infrared imaging apparatus optical lens fixing structure module (M5). The nonuniformity processing method based on the infrared imaging apparatus comprises hardware circuit correction, and single point and two-point calibration adaption correction processing methods. In the invention, a single-chip FPGA is used to realize infrared focal plane array independence imaging and fusion display of two paths of different wave bands or a same wave band; a modular design architecture is used; according to different detection distances, an infrared optical lens is replaced; advantages that a system integration level is high, the architecture is simple and flexible, processing real-time performance is high, the size is small, system reliability is high and so on are possessed; a software and hardware cooperation nonuniformity correction capability is possessed; and a correction effect is good and an adaptive correction capability is possessed.

The invention discloses an image mapping conversion method based on a multiple lenses and multiple sensors and a device. The device comprises a lens group, a sensor module and an image processing module; the image processing module comprises a data interface, projection conversion modules and a global control module; the lens group comprises at least one lens; the sensor module is used for converting an optical signal reflected by an object to an electric signal; the data interface is used for transmitting the data of at least one lens to the projection conversion module or converting the data of all lenses to an unified clock domain; the projection conversion module is used for processing the data of at least one lens and the sensor; the global control module is used for performing global control processing on the projection conversion modules. The image mapping conversion disclosed by the invention comprises an image conversion and an image mapping, simplifies the complexity of the conversion and mapping, reduces the operation quantity, improves the timeliness and reduces the power loss. Besides, the invention simultaneously process mapping and conversion of multiple lenses and supports the data reuse processing of multiple imaging units.

The invention specifically relates to a data service system based on the Internet of Things, belonging to the field of data services. According to the invention, a data acquisition module is connected with a wireless network and a data processing module; a wireless network is connected with the data processing module via a remote data transmitting and receiving module; the wireless network and the data processing module are both connected with an emergency control module; the data processing module is further connected with a client and a server; the client is connected with the server; the server is connected with a memory management module; and the memory management module is connected with a memory device. The data service system employs the wireless network data transmission schemes of GPRS and GSM, so integrity of data transmission of the system is improved; a multi-thread scheduling strategy is employed to realize improvement of the real-time processing performance of data and reduction in waiting time for data; and a second-level hierarchical directory storage structure is employed for storage of classified data, so data storage is convenient, simple and fast.

The invention discloses a metadata cluster parallel distribution processing method and a metadata cluster parallel distribution processing system. The method comprises the following steps: receiving network packets in network connection with metadata clusters in parallel, and distributing the received network packets to priority processing queues corresponding to the metadata clusters according to the preset priority, wherein each priority processing queue includes processing sub queues different in priority; and up-sending the network packets according to the priority of the processing sub queues in the priority processing queues, and up-sending the network packets of the processing sub queues with the same priority in different priority processing queues in parallel. By adopting the method and the system of the invention, the real-time performance of metadata cluster control packet processing is improved, and stable operation of metadata clusters at high load is realized.

The invention discloses a method for demodulating a quadrature phase shift keying modulation signal, which mainly solves the problems of long time required by carrier synchronization, poor receiving sensitivity and dynamic range, small phase margin and more occupied resources in the existing method. According to the implementation scheme, after being subjected to AD analog-to-digital conversion, multiplying a frequency band signal by a pair of initial orthogonal signals generated by a numerical control oscillator at the same time, and then carrying out low-pass filtering on the result to obtain two paths of intermediate signals I and Q; performing direct connection, inversion, summation and differencing operation on the two paths of intermediate signals in sequence to obtain four pairs of result orthogonal signals; and judging the quadrant and the blind phase point of the phase difference phi between the receiving end and the transmitting end according to the values of the four pairs of result orthogonal signals, and selecting the sign bit output of the four pairs of result orthogonal signals by using the result to obtain a demodulated baseband signal. According to the invention, the time delay of signal demodulation is reduced, the receiving sensitivity and the dynamic range are improved, the phase margin is improved, hardware resources are reduced, and the method can be used for electronic navigation and communication data transmission systems.