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150 results about "Filter window" patented technology
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Ocean salinity data correction method based on space-time gradient adaptive filtering
The invention relates to the field of ocean observation data processing, and discloses an ocean salinity data correction method based on space-time gradient adaptive filtering, which comprises the following steps of: calculating a motion compensation salinity gradient and a motion compensation temperature gradient; constructing a double-gradient driving filtering window, introducing a gradient sensitive weight distribution strategy, and carrying out adaptive dynamic filtering on the salinity data; generating an initial hyper-parameter combination of the GBDT model; inputting salinity data subjected to adaptive dynamic filtering into the model, optimizing an initial hyper-parameter combination of the model by using a grey wolf optimization algorithm, obtaining an optimal hyper-parameter combination through a dynamic search strategy, and obtaining a final salinity correction value at the same time; and carrying out index verification on the final salinity correction value, and when the salinity does not reach the standard, correcting a model hyper-parameter or a self-adaptive dynamic filtering parameter until the salinity reaches the standard. According to the method disclosed by the invention, the physical abrupt change signal of the spring layer region is reserved to the greatest extent while the noise is suppressed, and the accuracy of salinity profile correction is remarkably improved.
Owner:OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
Intra prediction method and apparatus based on interpolation filtering, video encoding method and apparatus, video decoding method and apparatus, and system
An intra frame prediction method and apparatus based on interpolation filtering, a video encoding method and apparatus, a video decoding method and apparatus, and a system. The intra prediction method based on interpolation filtering comprises: determining, based on a determined filtering window and a reconstructed value of a sample in a reconstruction area neighboring to a current block, a filtering coefficient used to perform interpolation filtering on the current block; and performing interpolation filtering based on a sample value of a reference sample neighboring to a current sample and the filtering coefficient, to determine a predicted value of the current sample.
Owner:GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD
Three-waveband medium-long wave infrared optical filter and preparation method thereof
The invention relates to a three-waveband medium-long wave infrared optical filter and a preparation method, the three-waveband medium-long wave infrared optical filter comprises a front film system, a substrate and a back film system, and the substrate is located between the front film system and the back film system; the front film system is formed by alternately overlapping germanium layers and zinc selenide film layers; and the back film system is formed by alternately overlapping germanium layers and zinc selenide film layers. According to the invention, the light energy of three wave bands of 3780-4000 nm, 4500-4900 nm and 7850-9500 nm is improved, the luminous flux of other wave bands is well inhibited, the technical problem of infrared filtering windows in some special infrared spectrum detection systems is solved, and a new scheme is provided for the application of the infrared spectrum detection systems.
Owner:SHANGHAI MIFENG LASER TECH CO LTD
Semi-solid-state circuit breaker with intelligent regulation and control function based on photovoltaic system
The invention relates to the technical field of circuit breakers, in particular to a semi-solid circuit breaker with an intelligent regulation and control function based on a photovoltaic system, which comprises a first acquisition module, a second acquisition module and a control module, the filtering window is used for acquiring to-be-filtered electrical data of the photovoltaic system and the to-be-filtered electrical data by using the semi-solid-state circuit breaker; the second acquisition module is used for acquiring filtering data of the to-be-filtered electrical data; and the regulation and control module is used for regulating and controlling the photovoltaic system according to the filtering data. And the filtering process of the electrical data of the photovoltaic system acquired by the semi-solid circuit breaker is optimized, so that the quality of the filtering data can be improved, and the effect of subsequently regulating and controlling the photovoltaic system based on the filtering data can be ensured.
Owner:SHANDONG DEYUAN POWER TECHNOLOGY CORP LTD
Filtering device with automatic cleaning function
ActiveCN120189742ATransportation and packagingStationary filtering element filtersMechanical engineeringFilter window
Owner:SHANDONG YIBAITONG VALVE CO LTD
Underwater facility defect geometric feature measurement method, system, medium and equipment
The invention relates to the technical field of underwater facility measurement, and provides an underwater facility defect geometric feature measurement method and system, a medium and equipment, and the method comprises the steps: calculating the actual sound velocity based on the water temperature, water pressure and salinity, correcting a sonar point cloud, calculating the sound velocity change rate, and adjusting the size of a filtering window, performing smooth filtering on the corrected sonar point cloud; for the surface image, calculating an image dark channel, after smoothing the dark channel image through scattering filtering, calculating transmissivity, fusing a scattering coefficient, removing surface image scattered light, and correcting the scattering coefficient through turbidity; based on the salinity and the water temperature, the underwater refraction angle of the laser is calculated, and the three-dimensional scanning point cloud is corrected; registering and fusing the point clouds to generate a facility surface point cloud model; based on the surface image, texture information of the facility surface is extracted, after the texture information is mapped to the facility surface point cloud model, a defect area is segmented, and geometric feature parameter extraction is carried out. And the detection reliability in a complex water area environment is improved.
Owner:STATE GRID INTELLIGENCE TECHNOLOGY CO LTD +1
Method and device for estimating Doppler parameters of moving target of satellite-borne SAR (Synthetic Aperture Radar)
The invention discloses a method and a device for estimating Doppler parameters of a satellite-borne SAR (synthetic aperture radar) moving target. The method comprises the following steps: generating a radar echo signal based on a pre-constructed simulation scene of a synthetic aperture radar detection moving target; preprocessing the echo signal to obtain an initial WVD curve of the echo signal; constructing a binary Gaussian matching filtering window based on the coordinate of the maximum amplitude position in the initial WVD curve, and filtering the initial WVD curve by using the filtering window to obtain a filtered WVD curve; calculating points are selected on the filtered WVD curve, a linear equation is fitted based on the selected calculating points, and estimation of the slope and intercept parameters of the linear equation is completed; and inverting the Doppler parameter estimation value of the radar moving target based on the estimated slope and intercept. According to the invention, the Doppler parameter of the moving target can be accurately estimated.
Owner:北京普航科技有限公司 +1
Dual-band medium-long wave infrared optical filter based on germanium / zinc sulfide asymmetric film system and preparation method of dual-band medium-long wave infrared optical filter
The invention relates to a dual-waveband medium-long wave infrared optical filter based on a germanium / zinc sulfide asymmetric film system and a preparation method of the dual-waveband medium-long wave infrared optical filter. The dual-waveband medium-long wave infrared optical filter comprises a front film system, a substrate and a back film system, the front film system and the back film system are formed by alternately overlapping germanium layers and zinc sulfide film layers; the average transmittance of the infrared optical filter in the wave band of 3800 nm to 4800 nm and the wave band of 8000 nm to 10000 nm is not lower than 91%. According to the two-waveband medium-long wave infrared optical filter disclosed by the invention, 3800 to 4800 nm amp is realized; according to the infrared filtering window, the light energy of medium waves and long waves of 8000-10000 nm is improved, the luminous flux of other wavebands is well inhibited, the technical problem of the infrared filtering window in some special infrared spectrum detection systems is solved, and a new scheme is provided for infrared application.
Owner:SHANGHAI MIFENG LASER TECH CO LTD
Element stripping method, device and equipment based on multispectral data and medium
ActiveCN121074690AEnsemble learningCharacter and pattern recognitionImage manipulationFilter algorithm
The invention discloses an element stripping method and device based on multispectral data, equipment and a medium, and relates to the field of remote sensing image processing, and the method comprises the steps: collecting a multispectral image of a target region; a self-adaptive window filtering algorithm is adopted to pre-process the multispectral image to obtain a multispectral enhanced image, and the self-adaptive window filtering algorithm calculates a window adjustment coefficient based on noise density, gray variance and gradient magnitude; spectral features and texture features are extracted from the multispectral enhanced image; fusing the spectral features and the texture features, and constructing fusion features of each pixel in the multispectral enhanced image; determining a ground feature category of each pixel based on the fusion features to strip a plurality of vectorized layers containing different elements; according to the method, the three indexes of the noise density, the gray variance and the gradient magnitude can be fused, the window adjustment coefficient is obtained, dynamic self-adaptive change of the filtering window size is achieved, and higher-precision data support is provided for subsequent element extraction.
Owner:JILIN JIANZHU UNIVERSITY
Automatic equipment data acquisition method and system
The invention relates to the technical field of data processing, in particular to an automatic equipment data acquisition method and system, and the method comprises the steps: obtaining the voltage data and temperature data of each piece of equipment; dividing the voltage data and the temperature data of each device into a plurality of time windows; acquiring a change trend coefficient of each device in each time window, and acquiring a temperature influence coefficient of each device in each time window; acquiring a voltage transient coefficient of each device in each time window; fractal dimensions of all the devices in all the time windows are obtained; acquiring an electromagnetic disturbance coefficient of each device in each time window; acquiring a data acquisition disturbance value of each device in each time window; and the disturbance coupling index of each device in each time window is obtained, and then the filtering window parameter of each device in each time window is obtained, so that adaptive filtering of the voltage data is realized. By analyzing the environmental interference degrees of different devices in different time periods, adaptive filtering is performed on the acquired data, so that the accuracy of data acquisition is improved.
Owner:SHENZHEN CE LANG INTELLIGENT TECH CO LTD
Industrial equipment operation data analysis method and system based on artificial intelligence, equipment and medium
The invention relates to the technical field of industrial data analysis, and discloses an artificial intelligence-based industrial equipment operation data analysis method and system, equipment and a medium, and the method comprises the steps: carrying out the dynamic noise reduction processing of the multi-source sensor data of the industrial equipment, and dynamically adjusting the size of a filtering window; performing cross-modal feature alignment on the multi-sensor data after noise reduction, and respectively extracting time-frequency domain features; constructing a lightweight state evaluation model based on the equipment maintenance knowledge base, performing equipment state evaluation on the fused features, and outputting a confidence index; performing multi-stage verification on the evaluation result, and dynamically correcting the confidence index according to the verification result; and triggering a control instruction in a grading manner according to the corrected confidence index, and completing closed-loop response from data analysis to equipment control. The method breaks through the technical bottleneck of a traditional method in a dynamic industrial scene on the premise of ensuring privacy security (data are not delivered out of a factory), and provides a standardized solution for predictive maintenance and intelligent control.
Owner:GUIZHOU POWER GRID CO LTD
Multi-frame reconstruction multispectral imaging system based on dynamic space-time joint coding
The invention discloses a multi-frame reconstruction multispectral imaging system based on dynamic space-time joint coding. The system comprises a filtering window module used for limiting the spectral range of imaging; the spatial code modulation module is used for providing spectral codes in a spatial dimension; the time coding modulation module is used for carrying out inter-frame modulation on the spectrum codes provided by the space coding modulation module; the optical imaging module is used for imaging the light field modulated by the time coding modulation module on the color acquisition module; the color acquisition module is used for carrying out further spectral coding on the light field to obtain a measurement image; a calculation reconstruction module; the method is used for recovering a high-dimensional multispectral image data cube by using a measurement image. The method has the advantages of being light in weight, low in cost, high in underqualitative relieving capacity, efficient and stable in reconstruction method, high in adaptability and practicability and the like.
Owner:NANJING UNIV
In-transit monitoring management method and system for logistics transportation
The invention relates to the technical field of data processing, in particular to an in-transit monitoring management method and system for logistics transportation, and the method comprises the steps: taking a mean value of adjacent data of any data in a vehicle speed data sequence as an ideal value of the data, calculating the noise intensity of the data, and correcting the noise intensity, the noise intensity represents the difference between the data and the ideal value, screening the corrected data with relatively low noise degree from the adjacent data of the preset filtering window of the data, adding the data into the filtering window to obtain the filtering window updated for the first time, and repeating the updating process on the basis of the updated filtering window, and calculating the optimization degree of the filtering window updated each time, performing mean filtering on the data by using the filtering window of which the optimization degree meets a preset screening condition, and monitoring the transportation process based on the filtered data. According to the invention, the accuracy of the filtered vehicle speed data is ensured, and accurate monitoring of the logistics transportation process can be realized.
Owner:MAIWEI TECH (GUANGZHOU) CO LTD
Insect echo self-adaptive filtering method based on micro-motion phase self-correlation matching
The invention discloses an insect body echo self-adaptive filtering method based on micro-motion phase self-correlation matching, belongs to the technical field of radars, and is used for solving the problems that an existing filtering mode of the main Doppler frequency of an insect target has certain limitation, full-scene adaptation is difficult to realize by a fixed window length, and the filtering efficiency is low. And low-frequency filtering causes that the insect target in low-frequency vibration flight cannot be effectively extracted and identified. The method comprises the following steps: carrying out instantaneous Doppler frequency model modeling processing on an original insect echo signal to obtain a target instantaneous Doppler frequency model; performing smoothing processing based on different sliding window lengths on the target echo phase to obtain a micro-motion phase after the main Doppler component is filtered; carrying out self-correlation function calculation under a related self-adaptive window length on the micro-motion phase after the main Doppler component is filtered out; determining an optimal filtering window length corresponding to the current insect phase signal; and performing slow-time signal echo compensation processing on the current insect phase signal to obtain a micro-motion signal of the current insect.
Owner:ADVANCED TECH RES INST OF BEIJING UNIV OF TECH +1
Positioning mapping method combined with attitude of unmanned ship
The invention relates to the technical field of navigation and positioning, in particular to an unmanned ship attitude-combined positioning mapping method, which comprises the following steps of: acquiring laser point cloud data and ship attitude information; constructing a dynamic height filtering window, and eliminating water surface reflection noise points; density clustering parameters are adjusted, and spatial isolated point clusters are eliminated; positioning and mapping are realized through tight coupling optimization; in the prior art, a fixed threshold filtering scheme is adopted, and inshore structure reservation and long-distance noise elimination are difficult to consider, so that wharfs, reefs and other characteristics in lake surface mapping are mistakenly deleted or a large number of water surface false points are remained; according to the scheme, a ship attitude adaptive dynamic height filtering window is innovatively provided, the filtering boundary is intelligently scaled in a wave disturbance environment through fusion of radar real-time height, point cloud statistics and a horizontal distance segmentation adjustment mechanism, specular reflection false points and wave false point clusters are accurately eliminated, and nearshore topographic features are completely reserved; and the structural integrity and the space authenticity of the water surface map are obviously improved.
Owner:JIANGSU UNIV OF SCI & TECH
A deep learning segmentation method for asphalt mixture CT images
A deep learning segmentation method for asphalt mixture CT images relates to the technical field of aggregate image segmentation. CT images of asphalt mixtures are collected and voids are removed. Image equalization is performed using a gamma beam hardening correction algorithm. A filter window is selected, and an adaptive bilateral filtering denoising algorithm based on local image information is used to denoise the image. The U-Net model is improved, with the Inception convolution module replacing the standard convolution operation and residual connections replacing skip-layer connections. A spatial attention mechanism is introduced, and a joint loss function is used. Image samples are selected, aggregates are labeled, and data augmentation is used to increase the sample size to form a training set for model training. After training, this set is used to segment other images. By equalizing and denoising CT images and using the improved U-Net model, the method can achieve accurate segmentation of aggregate-mortar boundary information, avoiding aggregate adhesion issues.
Owner:HARBIN INST OF TECH
Respirator device
One variation of a respirator device includes a shroud center portion, a filter assembly, and a gasket. The shroud central portion defines: a transparent central region configured to align with a user's nose and mouth; and a filter window laterally offset from the transparent central region. A filter assembly includes a filter media and a seal that: surrounds a perimeter of the filter media; the filter assembly is positioned within the filter window and defines a central groove configured to mate with an edge of the filter window to instantaneously retain the filter assembly within the filter window. The pad is disposed on the back side of the central portion of the lens and is configured to: seal against the face of the user; and positioning the lens center portion and the filter assembly offset from the user's face to form an airflow channel to direct airflow through the user's smooth cheek region.
Owner:克里斯多夫·埃斯特科夫斯基 +3
Filter window decision method and energy consumption data acquisition method, device and equipment
ActiveCN115510039BDigital data information retrievalSpecial data processing applicationsTemperature controlData acquisition
The present invention provides a method for deciding a filter window and a method, device and equipment for obtaining energy consumption data. The decision-making method includes: setting multiple groups of control parameters including setting temperature and startup number and multiple alternative filter windows with different window widths; using one group of control parameters to control multiple temperature control devices to run for a control cycle; within the control cycle, each time an observation cycle is reached, collecting energy consumption data of multiple temperature control devices; taking the end time of the control cycle as the end time of the alternative filter window, obtaining the energy consumption data collected in each alternative filter window and filtering it; determining a first comparison result expected by comparing energy consumption data corresponding to different groups of control parameters; comparing energy consumption data corresponding to different groups of control parameters when using each alternative filter window to obtain a second comparison result; comparing the two comparison results corresponding to each alternative filter window for consistency, and deciding to use the alternative filter window corresponding to the second comparison result with the highest consistency.
Owner:VERTIV TECH (XIAN) CO LTD
Image noise reduction method and device
The invention provides an image noise reduction method and device. The method comprises the following steps: acquiring pixels of an input image; traversing each pixel of the input image, and by taking the current pixel as a center, calculating a corresponding variance map and a corresponding mean value map through a filtering window constructed by the first radius and the second radius; calculating an image low-frequency coefficient based on the variance graph; and obtaining a low-frequency image according to the low-frequency coefficient and the mean value diagram, thereby realizing noise reduction of the flat region of the image. And filtering pixel points in different directions of the current position based on a filtering window constructed by a second radius, calculating a filtering difference value between the current pixel point and the pixel points in each direction, and optimizing a filtering result in each direction through the difference value, thereby realizing protection of detail features of the image. And based on the difference value, calculating the average value of the intercepted areas, judging the area where the current pixel point is located based on the average value, and fusing the low-frequency image and the noise reduction result in each direction so as to realize differential noise reduction processing on the flat area and the detail area and obtain a final noise reduction image.
Owner:HANGZHOU JITI MICROELECTRONICS CO LTD
Interferometric phase denoising method and apparatus
ActiveCN121169739Bkeep it realmaintain integrityImage enhancementBiological modelsPattern recognitionRadiology
The embodiment of the application provides an interferometric phase denoising method and device, relates to data processing technology, and the interferometric phase denoising method comprises the following steps: performing multi-scale frequency decomposition on an original interferometric phase map based on a preset frequency domain filtering window to obtain hierarchical phase signals containing different frequency components; calculating residual components of adjacent levels according to the difference between principal component signals of adjacent levels to obtain residual domain signals corresponding to each level respectively; performing denoising processing on the residual domain signals by using a pre-trained denoising model to obtain denoised residual domain signals corresponding to each level respectively; and performing phase reconstruction on the denoised residual domain signals corresponding to each level respectively to obtain a target interferometric phase map.The application can effectively maintain the authenticity and integrity of the phase structure while suppressing noise, effectively reduce the generation of artifacts and improve the convergence stability, and ensure the reliability of phase unwrapping and subsequent deformation inversion.
Owner:PEKING UNIV
Shooting method and device, electronic equipment and storage medium
The invention relates to a shooting method and device, electronic equipment and a storage medium. The shooting method comprises the following steps: in response to shooting of shooting equipment in a motion process, obtaining an image frame sequence collected by the shooting equipment; performing motion estimation on feature points of adjacent frames in the image frame sequence to obtain inter-frame motion vectors of the adjacent frames, and determining the length of a filtering window based on the inter-frame motion vectors; the inter-frame motion vector of the adjacent frames comprises an inter-frame horizontal motion vector and an inter-frame vertical motion vector, and the filtering window length comprises a horizontal direction filtering window length and a vertical direction filtering window length; based on the horizontal direction filtering window length and the vertical direction filtering window length, determining a target filtering window, and based on the target filtering window, performing smooth filtering on the displacement change vector of the shooting equipment between the adjacent frames; and carrying out image stabilization processing on the adjacent frame images based on the displacement change vector after smooth filtering, and outputting the image after image stabilization processing as a shot image.
Owner:BEIJING XIAOMI MOBILE SOFTWARE CO LTD
Modulation degree correction method, modulation degree correction device, modulation degree correction equipment, medium and illumination measurement system
The invention discloses a modulation degree correction method, device and equipment, a medium and an illumination measurement system, and the method comprises the steps: obtaining a phase-shift fringe image collected by a color imaging device, and enabling the phase-shift fringe image to be obtained through the projection of a measured object through a projection device; solving the phase shift fringe image to obtain an uncorrected modulation degree image; according to color filtering window distribution of a color imaging device, interpolated pixel points of the phase shift fringe image are screened out to serve as interpolation pixel points, and the interpolation pixel points cannot pass through a color filtering window; and calculating the modulation degree of the interpolation pixel point by using a modulation degree correction algorithm, and correcting the uncorrected modulation degree image according to the modulation degree of the interpolation pixel point to obtain a corrected modulation degree image. According to the invention, by correcting the modulation degree, errors caused by interpolation are effectively reduced, accurate modulation degree calculation is realized, and the precision of the illumination measurement system is further improved.
Owner:SHENZHEN UNIV
Nasal alar pulse wave signal processing method and device, medium and wearable device
This invention belongs to the field of nasal alar pulse wave signal processing technology, and provides a method, apparatus, medium, and wearable device for nasal alar pulse wave signal processing. The method includes: extracting the respiratory cycle based on the respiratory signal; determining the length of the mean sliding filter window to filter out the DC component of the original nasal alar pulse wave signal, obtaining a filtered nasal alar pulse wave signal; extracting the amplitude of the AC component of the filtered nasal alar pulse wave signal; adjusting the current of the light source element corresponding to the pulse wave signal sensing element to make the amplitude of the AC component of the filtered nasal alar pulse wave signal greater than or equal to a preset amplitude threshold; further filtering the nasal alar pulse wave signal using an adaptive weighted moving average filtering algorithm; and determining whether a nasal alar pulse wave signal meeting preset quality requirements is obtained based on a comparison between the noise figure of the further filtered nasal alar pulse wave signal and a preset noise figure threshold.
Owner:SHANDONG UNIV
Wafer transport box
The utility model discloses a wafer transportation box, which is characterized in that an upper cover and a bottom shell are respectively provided with a filter window which is integrally formed, and a filter membrane is arranged in an inner interlayer of each filter window, so that air flow in the wafer transportation box is realized, the humidity of the air is ensured to be consistent with that of external air, and the cleanliness in the wafer transportation box is ensured.
Owner:WUHU YIBAI VEHICLE PRECISION TECH CO LTD
Data processing system for preparation process of cosmetic medical dressing
The invention relates to the technical field of data denoising, in particular to a data processing system for a cosmetic medical dressing preparation process, which comprises a processor and a memory, the processor executes a computer program stored in the memory to implement the following steps: according to an outlier degree index value of the process monitoring data and a noise degree index value of each process monitoring data in the filtering window of the process monitoring data, performing weight distribution on the process monitoring data in the filtering window of the process monitoring data, obtaining a target weight value of each piece of process monitoring data in a filtering window of the process monitoring data; and according to the data in the filtering window of the process monitoring data and the target weight value of each process monitoring data in the filtering window, performing weighted mean filtering on the process monitoring data sequence to obtain filtering data. Noise can be completely filtered out as much as possible, and meanwhile distortion of non-noise data or key data can be avoided as much as possible.
Owner:CHANGCHUN WANCHENG BIO-ELECTRON CO LTD
An ultrasonic echo signal optimization method, device, medium and terminal device
ActiveCN119515719BImage enhancementImage analysisAdaptive filtering algorithmRectangular coordinates
The present invention discloses an ultrasonic echo signal optimization method, device, medium and terminal device. In this application, the preprocessed echo signal received by the ultrasonic probe is obtained, and this signal is presented in the form of envelope line data in the corresponding rectangular coordinate system. Then, with these envelope line data as the center, multiple neighborhood blocks are divided in the rectangular coordinate system, and the similarity weights between these neighborhood blocks are calculated to assign corresponding weight values to each neighborhood block. Finally, by combining the adaptive filtering algorithm, the minimized energy function, the distance from the envelope line data to the preset focus, and the weights of each neighborhood block, the size of the filtering window is adjusted to optimize the ultrasonic echo signal, so as to solve the problem that accurate ultrasonic echo signals cannot be obtained in the prior art.
Owner:GUANGZHOU SONOHEALTH MEDICAL TECHNOLOGIES CO LTD
ADC50Hz or 60Hz noise filtering method based on software algorithm
PendingCN121356579APhysical parameters compensation/preventionAnalogue/digital conversion calibration/testingFrequency spectrumNoise reduction
The invention discloses an ADC50Hz or 60Hz noise filtering method based on a software algorithm, and the method comprises the steps: carrying out the initialization configuration, and collecting original data; preprocessing and acquiring detection data; an improved Goertzel algorithm is used to acquire frequency spectrum parameters; calculating a three-level extraction factor, and sampling the data output by the ADC to obtain sample data; after forward and reverse compensation is carried out on the sample data, pulse noise suppression of a two-dimensional window is carried out on pulse noise; calculating a transmission quality index, and adjusting the size of a filtering window according to the transmission quality index; and carrying out amplitude calibration on the filtering result by using an improved comb algorithm, and outputting a standard signal after noise reduction processing. On one hand, the noise reduction processing scheme does not need to additionally add a filter circuit, so that the circuit size and the hardware cost are reduced; and on the other hand, the parameters in the method can be adaptively adjusted according to the frequency spectrum parameters, so that the adaptability is improved.
Owner:SHENZHEN SPARK ELECTRIC CO LTD
A method for detecting the stamping quality of a bumper fixing bracket
The present invention relates to the field of image data processing technology, and more specifically, to a method for detecting the stamping quality of a bumper fixing bracket, comprising: obtaining a surface image of the bumper fixing bracket; determining the suspected noise level of each pixel point; determining the position sensitivity of each pixel point; determining the window requirement level of each pixel point; determining the adaptive window side length of each pixel point; and filtering the surface image using a guided filtering algorithm based on the adaptive window side length to achieve stamping quality detection of the bumper fixing bracket. The present invention improves the accuracy of the guided filtering algorithm by dynamically adjusting the filter window size of each target pixel point, avoids defects such as over-smoothing or insufficient noise suppression caused by a fixed window, ensures that the details of the burr defect are retained, and reduces the interference between noise and real defects while denoising, thereby improving the accuracy of subsequent quality inspections.
Owner:SHAANXI ZETAO AUTO PARTS CO LTD
An adaptive image denoising processing method for low-illumination scenes
The application discloses a kind of low-illumination scene-oriented adaptive image noise reduction processing method, it is related to digital image processing technical field.The steps include: step S100: low-illumination image is collected and preprocessed, preprocessing includes dark current correction, bad point repair and lens distortion correction;By using back-illuminated CMOS sensor to collect image and execute dark current correction, bad point repair, the preprocessing operation of lens distortion correction, in combination with average brightness and gray standard deviation division low-illumination grade, according to noise intensity and distribution characteristics identify noise type, again based on preset parameter mapping table adaptive matching filter window size, noise reduction intensity weight and detail retention threshold technical means, it is difficult to eliminate in the process of low-illumination image acquisition fixed noise and system error, traditional noise reduction algorithm parameter fixed cannot adapt to different low-illumination grade and noise type, the problem of over-reduction or noise reduction deficiency, image edge detail loss is serious in noise reduction process.
Owner:BEIJING DRISK TECHNOLOGY CO LTD
Method and apparatus for judging image motion and stillness
The present invention discloses a method and device for judging image motion and stillness. The method includes the following steps: filtering the current frame image and the reference frame image respectively using a first filtering window, and performing differencing on the filtered current frame image and reference frame image to obtain a first difference image; filtering the current frame image and the reference frame image respectively using a second filtering window, and performing differencing on the filtered current frame image and reference frame image to obtain a second difference image, where the second filtering window is larger than the first filtering window; calculating a fusion weight according to the second difference image to obtain a fusion weight, and fusing the first difference image and the second difference image according to the fusion weight to obtain a fused difference image; performing binarization processing on the fused difference image to judge the motion area and the stillness area. Thereby, the accuracy of judging the motion area and the stillness area in a scene with a high noise level is improved.
Owner:HEFEI JUNZHENG TECH CO LTD