101results about How to "Anti-aliasing" patented technology

The invention discloses a polyphase permanent magnet synchronous motor current waveform optimal control method, comprising the following steps of A, current reference value coordinate transformation; B, current multiple proportion resonance regulation; and C, coupling compensation. In the control method, based on polyphase permanent magnet synchronous motor vector control, a polyphase synchronous rotating coordinate system current reference value is transformed to a current reference value of each phase in a polyphase static coordinate system through polyphase coordinate transformation, the current reference value of each phase and a current feedback value of each phase of a motor are respectively subjected to improved multiple superposition proportion resonance regulation, and a resonance separation method is introduced, decoupling is realized by feed-forward compensation, and floating tracking and harmful subharmonic restraining for highly dynamic property fundamental waves and usable subharmonic are realized. The method can restrain the adverse impacts, such as motor loss, torque ripple and vibration noise, caused by a harmful harmonic current of the polyphase motor, can explore the positive effects of the usable harmonic current, gives full play to the advantages of the polyphase motor and improves the system performance.

The invention relates to an electromagnetic prospecting sending-receiving integration method and a device. The invention is suitable for the fields of geophysical prospecting, engineering geological prospecting, underground military target detection, nondestructive inspection and the like. The technical scheme of the invention is as follows: arranging an inner receiving coil 1 in a sending coil 3; arranging an outer receiving coil 2 outside the sending coil 3; ensuring that magnetic flux passing through the inner receiving coil 1 and the outer receiving coil 2 is equivalent and is in opposite sign under the action of primary field; mutually offsetting primary field induced voltage; and only outputting a secondary field signal. The device comprises a transmitter 4, a sending coil 3, an inner receiving coil 1, an outer receiving coil 2, a signal conditioning circuit 5 and a receiver 6, wherein the inner receiving coil 1 is connected with the outer receiving coil 2, and the coil 1 and the coil 2 are connected with the signal conditioning circuit 5. The invention has the advantages of eliminating primary field influence, reducing signal dynamic range, expanding the practicability of small-wireframe same-point device and realizing integration of the sending coil and the receiving coil.

The invention discloses an edge adaptive de-interlacing interpolation method which proposes improvements aiming at solving the problems of the prior ELA interpolation method. The interpolation method which adopts an edge adaptive technique and interpolates loss information between two lines by making use of the correlativity of the two lines is characterized in that: the direction with greatest correlativity is selected as an interpolation direction through respective detections on a plurality of directions, and a plurality of groups of data in each direction are further selected for associate judgment, thereby improving the accuracy of the judgment. The method which is a de-interlacing interpolation algorithm with low cost, easy hardware realization, good edge protection and edge saw tooth removal ability can adjust interpolation directions adaptively and bring about good interpolation results in any direction. The method is effective not only two-dimensional interpolation but also for three-dimensional interpolation.

The invention belongs to the technical field of digital signal processing such as seismic exploration data processing and electronic signal processing, and particularly relates to a method for performing two-dimensional filtering to a digital signal. The method comprises the following steps: collecting data gathers of the digital seismic signal; performing Hilbert transformation to the data gathers of the digital seismic signal to obtain cosine phase function gathers and instantaneous envelope gathers of the digital seismic signal; conducting the two-dimensional filtering on the cosine phase function gathers; performing corresponding multiplication to the cosine phase function gathers after two-dimensional filtering and the instantaneous envelope gathers; and outputting the data gathers of the digital seismic signal after the noise, the interfering signal as well as the aliasing phenomenon are eliminated, so as to achieve the purpose of fidelity processing of the digital seismic signal.

The invention presents a speech processing method and device. The method includes the following steps: collecting N current speech frames; carrying out sub-band decomposition on each current speech frame to acquire M sub-band signals of each current speech frame, wherein N and M are positive integers; extracting sub-band signals of the same band from the M sub-band signals of each current speech frame; for each band, carrying out beam-forming on the N sub-band signals under the band to get a first speech signal; and carrying out sub-band synthesis on the first speech signals under the bands toacquire an output signal of the current speech frames. According to the method, sub-band decomposition is carried out on each speech frame collected, beam-forming is carried out on the sub-band signals under the same band, and an output signal is obtained through sub-band synthesis. The aliasing in the output signal can be eliminated. Moreover, the signal-to-noise ratio of the output signal is improved, a speech signal with high quality can be output, and the accuracy of speech localization can be improved.

The disclosure provides a display apparatus, and an image data processing apparatus and method. The image data processing apparatus comprises an edge detection module used for receiving to-be-displayed image data arranged in a delta manner and performing edge detection on the to-be-displayed image data to obtain edge sub-pixel points; a brightness comparison module used for comparing the brightness of each obtained edge sub-pixel point with the preset brightness; a brightness attenuation module used for performing brightness attenuation on the edge sub-pixel points whose brightness exceeds the preset brightness to obtain to-be-transmitted image data; and a data transmission module used for transmitting the to-be-transmitted image data to a source driver. According to the display apparatus and the image data processing apparatus and method, edge sawteeth can be well eliminated, and the sharpness of image edge display can be maintained.

The invention relates to a polyphase induction motor appointed secondary current waveform control method, comprising the following steps of A, current feedback value processing; B, current complex regulation; and C, voltage reference value determination. In the method, based on polyphase induction motor vector control, a polyphase motor current is mapped to a synchronous rotating coordinate system of mutually orthogonal fundamental waves and each usable subharmonic through polyphase synchronous rotating coordinate transformation, proportion integration resonance regulation and proportion integration regulation are respectively executed, and a complete current controller is formed by superposition; integration and resonance separation are respectively introduced so as to further improve the static and dynamic performances. The method has the advantages that the method is realized by digital control, and is simple and practical; the method can restrain the adverse impacts, such as motor loss, torque ripple and vibration noise, caused by a harmful harmonic current of the polyphase induction motor, can explore the positive effects of the usable harmonic, and gives full play to the advantages of the polyphase motor. The method can be used in the high-power alternating current motor driving occasions, such as marine propulsion, mining machinery and track hauling.

The invention discloses a video super-resolution reconstruction method based on adaptive interpolation kernel learning, comprising obtaining the interpolation kernel dictionary of a high resolution image block and a corresponding dual matrix according to a video image training set, wherein the video image training set comprises high and low resolution image blocks; obtaining the interpolation kernel of an image block structure corresponding to each atom in the interpolation kernel dictionary of a high resolution image block according to the interpolation kernel dictionary of the high resolution image block; and constructing the interpolation kernel of image small blocks of an image to be processed, and utilizing the interpolation kernel of image small blocks of the image to be processed to amplify the interpolation of the image to be processed according to the dual matrix and the interpolation kernel of an image block structure corresponding to each atom. The method at least partially better maintains edge and texture information in a video image, and effectively reduces distortion interference of aliasing, sawtooth, ringing, etc.

The invention discloses a method and a device for improving part precision of a surface forming additive manufacturing system. The method comprises the following steps: step 1): carrying out slicing treatment on a digital geometric model of a part supporting structure according to a given layer thickness z, and generating a corresponding mask image according to obtained two-dimensional layer-surface information; step 2): carrying out scanning conversion; step 3): obtaining a grey mask image through a grey calculating method based on Gaussian distribution; and step 4): generating an image. Compared with a conventional way of carrying out surface forming processing by adopting a binary mask image, the method disclosed by the invention is the grey calculating method based on Gaussian distribution, and can be used for quickly and efficiently obtaining the grey mask image which meets requirements; the adopted grey mask image can remarkably improve shape and dimension precision of processed parts on the premise of not changing a resolution rate of project hardware; and meanwhile, saw-tooth effect in the XY direction is obviously eliminated, so that better XY surface quality is brought.

The invention provides a wireless data transmission terminal. A digital intermediate frequency structure of the wireless data transmission terminal is used for under-sampling processing of intermediate frequency signals, then a complex band-pass filter is used for completing aliasing cancellation and out-of-band rejection, and finally decimation filtering and frequency mixing are carried out. The invention further provides a digital intermediate frequency processing method. The wireless data transmission terminal and the digital intermediate frequency processing method are capable of achieving intermediate frequency signal sampling in the condition of low cost and low power consumption.

The invention discloses a waveform saw tooth resisting method and a waveform saw tooth resistance processing device. The treatment on the displayed waveform line of prior sampling points comprises: using a sampling unit to obtain three data groups of adjacent domains of the displayed waveform lines of the last sampling point, the prior sampling point and the next sampling points; according to the data of adjacent domains, using a calculation unit to determine the characteristic region and the marginal region of the displayed waveform line of the prior sampling point; using a display processing unit to display the characteristic region via foreground color and display the marginal region via graded color. The invention can effectively resolve the saw tooth condition of waveform, and only needs to obtain the data of the prior sampling point, the last sampling point and the next sampling point to processing the image of one sampling period, to process saw tooth resistance. The method has low computational amount and no delay, is especially suitable for processing real-time waveform, and processing the waveform of small size and insufficient data of adjacent domains.

The invention discloses a remote sensing image amplification method based on PDE and wavelet, comprising the following steps: (1) a remote sensing image is amplified for the first time with a bicubic interpolating method according to the required amplification factor; (2) wavelet decomposition is carried out on a result amplified with the bicubic interpolating method, and low-frequency components obtained after the wavelet decomposition are replaced by original images, and then wavelet synthesis is carried out to obtain a wavelet amplification result; (3) a self-snake model in a PDE method is adopted to carry out post-treatment on the images amplified by wavelet to obtain an amplification image with strengthened and smooth edges. Images amplified with the remote sensing image amplification method have obvious edges. The remote sensing image amplification method eliminates the edge faintness caused by common amplification methods and can make edges smooth. On the basis of the self-snake model method, sawtooth is eliminated, and the edges are smoothened.

In the DSP which processes an image pickup signal obtained via an optical lens (imaging optical system) and outputs the resulting image pickup signal as processes to an image display section, distortion aberration due to the optical lens is corrected according to a distance from a pixel position corresponding to an optical axis of the optical lens by changing the pixel position for each of a target image in radial directions when the pixel position corresponding to the optical axis is set as a center while suppressing an occurrence of jaggy in the resulting image. With this structure, an image pickup apparatus which corrects distortion aberration by changing pixel position only in radial directions from a pixel position corresponding to an optical axis of the imaging optical system while suppressing an occurrence of jaggy.

An interpolation method for image enlargement includes confirming interpolation line position, using picture element values of the first adjacent line and the second adjacent line of the interpolation line to confirm picture element value of interpolation line for making interpolation, carrying out smooth processing for the first adjacent line, the second adjacent line and interpolation line.

The invention discloses a digital wireless voice frequency transmission system and method based on a 2.4GHz frequency. Forward error connection (FEC) coding, interleaved coding and corresponding FEC decoding and de-interleaving processing are adopted for 2.4GHz digital radio frequency signals, frequency hopping control and frequency modulation synchronous tracking are adopted for 2.4GHz digital radio frequency signals simultaneously, so that wireless audio transmission error codes or staccato can be avoided effectively, and multi-path interference and discrete co-channel interference can be avoided simultaneously; the signal transmission safety can be effectively improved through encryption; and a digital wireless audio transmission microphone performs low-pass filtering before digitizing voice signals, so that high-frequency digital clutters can be eliminated. Through the digital wireless voice frequency transmission system and method, wireless audio transmission error codes, multi-path interference, electromagnetic interference, discrete co-channel interference and aliasing distortion can be avoided effectively, and the system and the method are high in fidelity and safety and wide in bandwidth.

The invention discloses a method for automatic correction of a digital ground elevation model for low-altitude aerial photogrammetry. The method comprises the steps of: a) generating a digital surface model point cloud by using a digital aerial image of an object captured by a low-altitude UAV; b) extracting target points with elevation abrupt change in the digital surface model point cloud; c) extracting an object edge contour line by using targets point extracted in the step b); and d) correcting the elevation value of the object edge contour line extracted in the step c). The invention utilizes the ground surface height model point cloud data to extract the edge contour line of a building and conduct regularization processing, so as to establish a digital elevation model; and digital differential rectification is carried out on this basis to generate an orthoimage. The method not only can effectively eliminate the jagged distortion at the edge of the abrupt change position of the building elevation in the orthoimage and beautify the orthoimage, but also ensures the plane accuracy of orthoimage and greatly promotes the application of low-altitude UAV aerial photogrammetry technology.

The invention discloses a short-range microwave holographic imaging experiment system and method. An experiment platform is set up through a reconstruction target, a scanning device, a scanning control device, an image processing device and a vector network analyzer to study the short-range microwave holographic imaging technology. The scanning device can complete scanning of the reconstruction target just through two horn antennae, so that the cost is greatly lowered, and experiment errors are reduced. The vector network analyzer is adopted for achieving the cross-correlation phase solution of signals to obtain S parameter data of the target, so that the real-time performance is good, the efficiency is high, and the deign cost and the complexity are greatly lowered. The image processing device processes holographic data of the target according to the convolution kernel grid method, so that the aliasing effect caused by grid deviation is effectively eliminated, and the definition and the imaging quality of a target reconstructed image are improved. By means of the short-range microwave holographic imaging experiment system and method, problems probably existing in the practical application of the short-range microwave holographic imaging technology can be better found out and solved, and therefore the development of the short-range microwave holographic imaging technology in the practical application can be promoted.

The invention discloses a distance and velocity two-dimensional high-resolution processing method of sparse frequency hopping signals. The method comprises the following the steps that: frequency hopping codes are randomly extracted from a frequency set so as to form the transmission waveforms of the sparse frequency hopping signals; initial velocity compensation is performed on echo sampling baseband signals; velocity dimension alignment is performed; cross term compensation is performed; distance-dimension iteration interpolation sidelobe suppression high-resolution processing is performed; velocity-dimension inverse Fourier transform processing is performed; and Doppler iterative interpolation high-resolution processing is performed. With the method of the invention adopted, a distance sidelobe suppression problem due to random frequency hopping or spectrum discontinuity in radar signal distance and velocity two-dimensional processing can be solved, and velocity resolution can be improved.

The invention discloses a wavelet packet decomposition based gas turbine engine combustion signal analysis method. The wavelet packet decomposition based gas turbine engine combustion signal analysis method comprises the steps of using a sensor to acquire combustion signals in a multi-channel mode, filtering and amplifying the acquired combustion signals, then transmitting the signals to a CPU processor through an FPGA module, establishing a wavelet packet decomposition algorithm in the CPU processor to analyze the combustion signals in a frequency band dividing mode, then respectively transmitting analysis results to a human-computer interface and a control system. The wavelet packet decomposition based gas turbine engine combustion signal analysis method can accurately acquire a combustion pressure pulse signal of a combustion gas turbine and can send a corresponding instruction according to the acquired signal so as to ensure normal, stable and safe operation of a unit.

The invention discloses an image deblurring method and device, computer equipment and a storage medium. The method comprises the following steps: constructing a residual network ResNeXt, and carryingout the feature extraction of an original image to obtain five initial feature graphs; carrying out convolution operation with the convolution kernel size of 1 * 1 on the initial feature graphs to obtain five intermediate feature graphs; carrying out detail recovery iterative processing on the intermediate feature graphs, and performing convolution operation to obtain five detail feature graphs; performing nearest neighbor up-sampling on the five detail feature graphs, and converting the five detail feature graphs into detail feature graphs with the same size; merging the detail feature maps of the same size to obtain a feature-fused feature graph; and performing convolution operation on the feature-fused feature graph, then carrying out double nearest neighbor up-sampling to obtain a feature map with the same size as the original picture, and performing convolution operation on the obtained feature graph to obtain a deblurred image. Image features under different scales are fused, andthe image detail recovery effect is ensured while the algorithm efficiency is ensured.

The invention discloses a dryer temperature control system based on a bridge type filter circuit. The dryer temperature control system is mainly composed of a single-chip microcomputer, a display, a temperature value prestoring module, an A / D conversion module, a heater CZ, a power supply and a temperature sensor connected with the A / D conversion module, wherein the display, the temperature value prestoring module, the A / D conversion module, the heater CZ and the power supply are all connected with the single-chip microcomputer. The dryer temperature control system is characterized in that the bridge type filter circuit is connected between the A / D conversion module and the single-chip microcomputer in series, a three-line drive filter circuit is connected between the single-chip microcomputer and the heater CZ, and the three-line drive filter circuit is composed of a drive chip U, a bootstrapping amplification circuit connected with the drive chip U, and an active power filter circuit with the input end connected with the output end of the bootstrapping amplification circuit and the output end connected with the heater CZ. The dryer temperature control system is stable in performance, high in practicability and capable of ensuring stability of the drying temperature of a hot wind type dryer.

The invention discloses a method for eliminating edge saw teeth of an image, comprising the following steps: firstly, pixel values of a foreground image and a background image of an image to be processed are analyzed; Then the edge to be processed of the foreground image is determined, pixel values of the edge to be processed are acquired, mixed pixel values according to the pixel values of the edge to be processed and the pixel values of the background image are acquired, and the transparency of the mixed pixel to opaque is changed; Then an original pixel value of a corresponding position isreplaced in the image edge with the mixed pixel value to generate a processed foreground image; Finally, the processed foreground image and the background image are synthesized to generate a new image. The invention also discloses a device for eliminating edge sawtooth of an image. The method and the device of the invention can display images with rich colors under the conditions of poor display performance and poor processor performance, achieve the optimization effect of eliminating the edge saw teeth of icons, and can greatly reduce the cost required by the display interface.

The invention relates to a real time wide view ultrasonic imaging device and method. The method comprises the steps of acquiring an image, registering the image, fusing the image and carrying out edge optimization. The device comprises a wide view image acquisition module, a wide view image registration module, a wide view image fusion module and a wide view image edge optimization module. The method and the device which are provided by the invention have the advantages that ultrasonic image information of a continuous sequence is directly acquired from the image acquisition module for carrying out image registration and image fusion, the ultrasonic image information does not need to be acquired from a static video, then real time map making is realized by combining an efficient algorithm in the invention, and great help is provided for operation and diagnosis of a user.

The invention relates to the technical field of semiconductor manufacturing, in particular to a manufacturing method of a three-dimensional memory and a three-dimensional memory. The manufacturing method of the three-dimensional memory comprises the following steps: providing a substrate having a stack layer on the substrate, the stack layer comprising an interlayer insulating layer and a sacrificial layer alternately stacked in a direction perpendicular to the substrate; Etching the stack layer to form a channel hole penetrating the stack layer. The sidewall surface of the channel hole is planarized to reduce the distance between the adjacent interlayer insulating layer and the same side end face of the sacrificial layer and to reduce the roughness of the sidewall of the channel hole. Theinvention reduces the roughness of the side wall surface of the channel hole, and remarkably improves the storage and erasing performance of the three-dimensional memory.

The invention relates to a processing method of digital images, in particular to an image de-interleaving method based on block partitioning. The method comprises the following main steps of: a. partitioning input images into a plurality of image blocks in equal size; b. calculating a basic motion area and a non-basic motion area according to the difference of an image block corresponding to the front image and the back image; c. further calculating an expansion motion area at the non-basic motion area; d. carrying out de-interleaving treatment on the non-basic motion area and the expansion motion area. According to the image de-interleaving method based on block partitioning, the area in block, which needs de-interleaving treatment can be searched effectively; and details of a static image area are remained; sawteeth at edges of a motion target are eliminated effectively; and subjective feeling of an image sequence is improved greatly.

A reproduction device which updates a character string in synchronization with a moving image displays a tone character using a free index in a color look-up table. A previous analysis part which previously analyzes character string display instruction information in a text subtitle stream is provided, thereby the index which is not used in the color look-up table can be grasped previously. Therefore, the tone character using the free index in the color look-up table is displayed.

The invention relates to a depth image filtering method and device, computer equipment and a storage medium. The depth image filtering method comprises the steps: obtaining information of a first depth image and information of a first image of a current image; obtaining a second pixel value set from the first pixel value set according to a difference value between a pixel value at a target position in the first image and a pixel value in a preset neighborhood range of the target position; obtaining a second depth value set from the first depth value set according to the second pixel value set,the second corresponding relationship, the third corresponding relationship and the first corresponding relationship; and filtering the first depth image according to the second depth value set to obtain a second depth image. Therefore, the sawtooth phenomenon existing in the filtered image can be eliminated to a great extent, and the edge accuracy is improved, and the main body edge of the depthimage is better attached to the main body edge of the color image or the gray level image.

The invention discloses an image processing method and device. The image processing method is realized based on an FPGA, and comprises the steps: obtaining a plurality of sub-input images, and storingthe sub-input images in a first memory; according to the resolution of the input image, obtaining a sub-input image from the first memory, and carrying out blocking processing on the sub-input imagesto obtain sub-input image blocks; according to the magnification times and the rotation angles of the output images, performing rotation magnification and interpolation processing on the sub-input image blocks to obtain sub-output image blocks, and storing the sub-output image blocks in a second memory and a third memory; and according to the resolution of the output image, obtaining a sub-outputimage block from the second memory or the third memory to obtain an output image. According to the image processing method provided by the invention, the input image is blocked and is not limited tooperation on the whole input image, so that the image processing method is easier to realize in the FPGA, and rapid rotation amplification of the image can be realized, and the effect after rotation amplification is very good.