54 results about "Single band" patented technology

The invention provides a large-scale insect and bird migratory flight monitoring system based on a weather radar net, and the system employs a data collection module to obtain S, C and X wave band weather radar monitoring data of the national weather radar net, and a quality control module carries out the quality control of the radar-based data in the monitoring data, and further provides the radar-based data to an echo recognition module to construct recognition features. A classification recognition result is obtained by adopting a recognition model corresponding to the wave band; the inversion quantification module inverts the insect and bird density, the insect and bird speed and the vertical distribution of the movement direction based on the classified and identified insect and bird echoes to obtain an inversion quantification result; and the classification identification result and the inversion quantification result of the single wave band form a local monitoring result. And the visualization module displays a single-band local monitoring result or a multi-band fusion monitoring result. According to the invention, multi-band data can be collected, monitoring results are fused, real-time and efficient monitoring of migration of insects and birds is realized, and the monitoring range is expanded.

The invention relates to the technical field of image data processing, in particular to a multiband hyperspectral image fusion method for predicting surface moisture of coal, which comprises the following steps: acquiring visible light and near-infrared images and calculating reflection difference frequency, constructing a grade layer and then executing region mapping and brightness superposition, extracting pixel features and sorting and dividing threshold regions, and identifying boundary change and generating a graph block, and finally reconstructing a moisture distribution graph surface according to a gray scale. According to the method, pixel-level distinguishing is carried out through reflection differences of visible light and near-infrared images, hierarchical layers are constructed based on multi-band reflection changes, layer stacking and classification are completed in combination with characteristics such as brightness, edge changes and space concentration ratio, moisture region boundaries are delimited, and moisture level maps are generated according to gray scale sorting. Fine grading and boundary positioning of the moisture content are realized, the prediction precision is improved, the problems of single-band processing limitation and fusion information loss are solved, and the identification capability of the moisture area in the complex coal surface environment is enhanced.

The embodiment of the invention provides a remote sensing image atmospheric correction method and system for an ocean near-shore scene, and relates to the technical field of ocean remote sensing image atmospheric correction. According to the method, after remote sensing data is obtained, solar flare correction is executed by extracting a target mask and using a secondary simulation model of a satellite signal in a solar spectrum. And then a multi-band darkness index is calculated, and an optimal aerosol optical thickness value is inverted through a radiation transmission model. And calculating the atmospheric correction coefficient of each wave band according to the optimal aerosol optical thickness value so as to generate correction result data. According to the method, on the basis of robust flare correction of the SWIR proxy, scene-adaptive flare proxy is constructed by utilizing water body reflection and path radiation physical characteristics of the SWIR under a deepwater condition, and flare deduction is realized. Inversion is carried out through multiband combined darkness indexes, and the spectral characteristics of the deep water body reflected in the visible spectrum are utilized, so that single-band random noise is smoothed, and the accuracy of an AOT estimation result is improved.

Single band and multiband wireless antennas are an important element of wireless systems. Competing tradeoffs of overall footprint, performance aspects such as impedance matching and cost require not only consideration but become significant when multiple antenna elements are employed within a single antenna such as to obtain circular polarization transmit and / or receive. Accordingly, it would be beneficial to provide designers of a wide range of electrical devices and systems with compact single or multiple frequency band antennas which, in addition to providing the controlled radiation pattern and circular polarization purity (where required) are impedance matched without substantially increasing the footprint of the antenna and / or the complexity of the microwave / RF circuit interfaced to them, whilst supporting multiple signals to / from multiple antenna elements in antennas employing them. Solutions present achieve this through provisioning one or more capacitive series reactances discretely or in combination with one or more shunt capacitive reactances.

The invention discloses a water quality inversion method based on multi-strategy improved sparrow search optimization machine learning. The method comprises the following steps: firstly, collecting the reflectivity of a water sample by using a spectrograph, and converting the collected reflectivity into an equivalent albedo of a corresponding wave band of a Sentinel-2 satellite through a spectral response function; collecting a water sample on site, and measuring the TSM concentration and Chla concentration; the obtained equivalent albedo is constructed into combined features in a single-band and multi-band mode, and the first four combined features of the correlation are selected as feature input; inputting the selected combined features into a plurality of machine learning models for contrastive analysis to invert the performance of TSM and Chla concentration, and determining an optimal machine learning model; then constructing a multi-strategy optimized sparrow search algorithm; and performing water quality inversion on the Sentinel-2 image by using the optimal machine learning model obtained by optimization of the obtained multi-strategy optimized sparrow search algorithm. According to the invention, the model inversion precision is improved.

The present application belongs to the technical field of image processing, and particularly relates to a multi-band image cascade fusion method. The present application adopts a brightness modulation method to normalize the gray scale or brightness component of one of the single-band images to be fused, and to multiply the brightness component of the other single-band image in the HSV color space format, so as to complete brightness fusion. Then, the brightness cascade fusion of the third image or more images is performed, so that the multi-band fusion image retains the brightness information of different band images, and reflects the significant features of different band images. Furthermore, the color information of the restored color visible light image or the colorization of the black-and-white visible light image / infrared thermal image makes the feature details of the fusion image more clear and easy to identify. The present application has low computational complexity and is suitable for real-time processing of embedded systems.

The invention discloses a full-wave-band dynamic sunlight player with a three-stage coaxial soft light structure, and relates to the technical field of healthy lighting and high-precision simulation light sources. The core three-stage coaxial soft light structure is composed of a high-atomization concave soft light cavity, a convex high-reflection soft light structure and a full-coating high-transmittance soft light shell which are coaxial, and glare-free and high-uniformity full-wave-band light emitting is achieved. The equipment is provided with a full-wave band narrow-band combined lamp group covering weak ultraviolet rays to near infrared rays, so that a continuous sunlight spectrum is formed; single-band single-line independent driving is adopted, a pure hardware simulation gradual change control unit is matched, and non-stroboscopic smooth gradual change and accurate regulation and control are achieved. The equipment is provided with a local time service module and a storage medium, and a networking module can be selected to be matched with a factory spectrum calibration method to guarantee output consistency. The system can truly restore the natural sunlight spectrum, adapts to the biological rhythm, is suitable for medical treatment, laboratories, space stations and other scenes, and has the advantages of being high in reliability, continuous in spectrum, strong in soft light effect, high in biological friendliness and the like.

The application provides a method for searching exposure time and a quantum efficiency measuring system, comprising: a data processing module configured to configure fixed parameters of an image acquisition module and wavelengths of a wavelength configuration device; the image acquisition module is controlled to determine a candidate exposure time set according to a search step and an initial value of exposure time; after the wavelengths of the wavelength configuration device are configured, single-band light configured by the wavelength configuration device is received through an optical fiber bundle; a target exposure time is selected from the candidate exposure time set multiple times; images are captured multiple times under the environment of the wavelength of the wavelength configuration device; if the images do not occur light cutoff and satisfy a preset image saturation constraint condition and an image linearity constraint condition, the target exposure time is taken as a set of exposure times corresponding to the current wavelength; and a set of exposure times corresponding to the wavelength of each wavelength configuration device is searched until a set of exposure times corresponding to the wavelength of each wavelength configuration device is searched. The method is used to accurately search for exposure time meeting the linearity requirement.

This invention relates to the field of optical imaging technology, specifically providing an optical radar co-aperture off-axis imaging system, comprising: an off-axis mirror assembly, a frequency-splitting device, a radar transceiver system, and an optical imaging system. The frequency-splitting device is disposed in the rear optical path of the secondary mirror and is used to reflect light waves and transmit microwaves. The frequency-splitting device includes a frequency-selective surface, which comprises an FSS pattern layer and a bias line layer. The FSS pattern layer includes periodically arranged FSS units. Nonlinear capacitors are electrically connected to the FSS units. The bias line layer applies a voltage to the nonlinear capacitors according to the received microwave band. By changing the voltage applied to the nonlinear capacitors, the resonant frequency of the FSS units is tuned, thereby changing the microwave passband frequency of the frequency-splitting device. This invention not only achieves a reflective wave-transmitting microwave design but also solves the problem that transmitting only a single band of microwaves in microwave-transmitting and light-reflecting methods is difficult to adapt to different task requirements.

A computer-implemented method and system includes accessing neurophysiological and neurovascular data recorded during sleep. A device worn on the subject's head during sleep can collect the neurovascular data by measuring transcranial impedance. The device can be in the form of a single band, multiple bands, or a head cap worn on the subject's head. Electrodes positioned along the inner surface of the wearable device contact the subject's head and measure the transcranial impedance. Transcranial impedance measurements are collected from multiple locations on the subject's head and across multiple frequencies to obtain a more complete assessment of glymphatic flow.

Systems and methods for reducing loading in antenna switch module multiplexing are disclosed. In one aspect, a radio frequency front end includes a plurality of filters configured to filter radio frequency signals, the filters including a first filter configured for single band wireless communication and two second filters configured for multiplexing wireless communication. The radio frequency front end further includes an antenna switch module including a first switch configured to connect an antenna to the first filter for the single band wireless communication, and two second switches configured to connect the antenna to the second filters for the multiplexing wireless communication, the second switches having a lower on-state resistance than the first switch.

Multi-band remotely configurable tuning probes for slide screw impedance tuners allow instantaneous larger frequency coverage beyond the capacity of existing tuning probes using the single horizontal and vertical axis mechanism of a prior art single probe, single band tuner. This is done by carving multiple slugs of different length and frequency coverage as segments of a disc-shaped revolving slab, which rotates inside the legs of a captive unit and locks at distinct angles. The captive unit is attached to the vertical control mechanism of the tuner and rotation is ensured using multiple traverse lateral studs on the disc unit and a set of vertical studs on the slabline close to the idle port of the tuner. An automated procedure ensures remote switching between tuning slugs. Calibration and tuning is as in prior art single probe tuners.

This invention relates to the field of electrocatalytic oxidation technology, and provides a fluorescence detection condition control system and method, comprising: a strategy library, which uses XGBoost to train strategy algorithm models for different water sample qualities and initial wavelength bands; an initialization module, which loads water quality types from the strategy library according to the detection environment and sets initial state water sample conditions; a pre-excitation module, which illuminates single-band LEDs one by one to obtain initial fluorescence response values; an adaptive detection module, which calls the strategy algorithm model and generates wavelength combinations and excitation intensity configurations based on the initial fluorescence response values; a temperature compensation module, which monitors key temperatures in real time using a temperature sensor and compensates for fluorescence errors caused by temperature drift; and an analysis report module, which outputs Cu... 2+ Concentration detection results. This invention combines a water quality preset strategy library and a temperature compensation mechanism to achieve Cu concentration detection in complex matrix environments. 2+ Fluorescence detection significantly improves the accuracy and environmental adaptability of detecting low-concentration heavy metals.

Triple band remotely configurable tuning probes for slide screw impedance tuners allow instantaneous larger frequency coverage beyond the capacity of existing tuning probes using the single horizontal and vertical axis mechanism of a prior art single probe, single band tuner. This is done by combining two types of tuning slug, a core slug and a saddle slug into a configurable tuning probe assembly mounted in the same mobile tuner carriage and controlled using the same single vertical axis mechanism with the help of two ridges on the core slug and a permanently mounted slug control fork. To avoid spurious resonance phenomena the tuning slugs are controlled, driven, and locked vertically sliding on each other, and guided appropriately allowing smooth, uninhibited vertical movement of the metallic bodies.

This invention discloses a testing device and method for testing crystal uniformity using photoelectric properties. The method includes: pre-setting multiple different target detection bands; scanning the target detection area of ​​the crystal under test using excitation light in each preset target detection band to obtain a fluorescence signal matrix; preprocessing the fluorescence signal matrix in each target detection band to obtain a fluorescence intensity distribution matrix; extracting single-band uniformity parameters from the fluorescence intensity distribution matrix; and fusing the single-band uniformity parameters from all target detection bands to obtain crystal uniformity parameters as the test result. This invention achieves quantitative output of both global and local uniformity results for crystal uniformity.

The application discloses an aerial filter array multi-spectral image strip preprocessing method and belongs to the technical field of aerial image processing. The aerial filter array multi-spectral image strip preprocessing algorithm is proposed to solve the problem that the strip cutting is not accurate due to the low strip overlap rate and spectral aliasing interference of the filter array multi-spectral image. The strip image gray extreme points are calculated through the multi-spectral image row pixel gray mean value. The intersection position of the minimum value of the middle region gray of the strip image and the gray curve is taken as the strip cutoff point. The strip spectral aliasing range is obtained by subtracting the strip cutoff point from the gray extreme point. The effective region coordinates of each strip are calculated according to the maximum spectral aliasing width and the gray extreme point, and the single-band strip image is obtained. Theoretical analysis and experimental results show that the method can accurately extract the effective region of each strip and can maximize the retention of the overlapping region pixels.

The invention discloses a soil salinity inversion method and device based on a hybrid generative adversarial network, and the method comprises the steps: constructing a dual-band and a triple-band of each soil sample, and calculating a second spectral index of each dual-band and a third spectral index of each triple-band; screening dual wavebands according to the first Pearson's correlation coefficient and a preset threshold value, and screening three wavebands according to the second Pearson's correlation coefficient and the preset threshold value; and training the feature hybrid generative adversarial network by using the single wave band, the first coordinate and the first spectral index, and generating a plurality of first synthetic spectral samples and second coordinates according to the screened double wave bands, the second spectral index, the first coordinate, the screened three wave bands and the third spectral index. According to the method, the quality, diversity and number of the second synthetic spectrum samples are improved, the problem that the generalization ability of the soil salinity prediction performance optimal model is weak is solved, and the soil salinity prediction precision of the soil salinity prediction performance optimal model is improved.

The invention discloses a device and a method for testing crystal uniformity by using photoelectric characteristics. Comprising the following steps: presetting a plurality of different target detection wavebands, and scanning a target detection area of a to-be-detected crystal by using exciting light under each preset target detection waveband to obtain a fluorescence signal matrix; preprocessing the fluorescence signal matrix under each target detection waveband to obtain a fluorescence intensity distribution matrix, and extracting single-waveband uniformity parameters from the fluorescence intensity distribution matrix; and carrying out fusion processing on the single-band uniformity parameters under all the target detection bands to obtain a crystal uniformity parameter as a test result. According to the method disclosed by the invention, quantitative result output of global and local uniformity of the crystal uniformity is realized.

The application discloses a multispectral point cloud generation method based on multispectral image reconstruction, a storage medium and equipment, and belongs to the technical field of multispectral image three-dimensional reconstruction. In order to solve the problems of insufficient utilization of spectral information, low reconstruction accuracy and low efficiency in the prior art, the application first performs radiation correction and band alignment on a multispectral image, and superimposes a plurality of single-band images to synthesize a band-aligned multispectral image; a combination of image enhancement and a SIFT feature operator is adopted to obtain wave-band-by-wave-band features and fuse multispectral features; then, NDVI masks based on the multispectral image are used to match the fused multispectral features, a matching relationship of the multispectral image in an image set is established based on the feature matching pairs, a motion structure recovery method is used to calculate image relative pose information, a multi-view geometric matching technology is used to calculate image depth values, multispectral values are projected, and multispectral point clouds are generated.

The invention relates to an acousto-optic tunable filter (Acoustical-optical tunable filter-AOTF), which is an electrically controlled tunable spectrum light splitting device, and is characterized in that the acousto-optic tunable filter (Acoustical-optical tunable filter-AOTF) is an electrically controlled tunable spectrum light splitting device. In a complex task, single-band information is often insufficient to support a decision, so that the invention provides a design method of a single transducer-dual-band acousto-optic tunable filter, a numerical calculation model is established through a dual-band wave vector geometry principle, and a dual-band tuning relationship under different cutting types is obtained. And furthermore, the design of the dual-band AOTF device with high diffraction efficiency and low power consumption is realized through the size optimization design of the transducer. Compared with an existing AOTF device design method, the single-transducer-dual-waveband AOTF device design method can utilize a single simple single-transducer AOTF device to obtain dual-waveband spectral data at the same time, the spectral range is expanded, the spectral detection efficiency is improved, and the detection capacity for a dynamic target is improved. Meanwhile, the dual-band detection can reduce the frequency of electrical power loading of the transducer, the thermal load of the device is reduced, and the working stability of the device is improved.

Tri-state triple band remotely configurable tuning probes for slide screw impedance tuners allow instantaneous larger frequency coverage beyond the capacity of existing tuning probes using the single horizontal and vertical axis mechanism of a prior art single probe, single band tuner. This is done by combining two tuning slugs, a master slug and a slave slug into a configurable tuning probe assembly mounted in the same mobile tuner carriage and controlled using a single vertical axis mechanism. To avoid spurious resonance phenomena the tuning slugs are controlled, driven, and locked vertically sliding on each other, and guided appropriately allowing smooth, uninhibited vertical movement of the metallic bodies.

Various solutions for supported band reporting in mobile communications are described. The user equipment (UE) may receive a capability enquiry message indicating a supported band filter information from a network node. Also, the UE may include at least one of a plurality of supported bands into a supported band list of single band based on the supported band filter information. Further, the UE may include the supported band list into a capability information message, and transmit the capability information message to the network node. As the supported bands are filtered based on the network indication, the size of the capability information message can be reduced.

The invention belongs to the technical field of hyperspectral remote sensing, and relates to a method for rapidly extracting chlorite minerals by using 02D data of resource I. The method comprises the following steps: step 1, carrying out atmospheric correction and ortho-rectification on the 02D data of the resource I; 2, calculating a single-band mean value image of a first spectral absorption valley of the chlorite altered mineral; 3, calculating a single-band mean value image of a second spectral absorption valley of the chlorite altered mineral; 4, calculating a single-band mean value image of a first spectral reflection peak of the chlorite altered mineral; 5, calculating a single-band mean value image of a second spectral reflection peak of the chlorite altered mineral; 6, calculating chlorite altered mineral single-band images for multiple times by adjusting floating parameters, and storing the chlorite altered mineral single-band images with relatively good extraction effects; and 7, determining a chlorite mineral distribution range by using a density segmentation method, and outputting vector elements. According to the method, the chlorite mineral extraction speed and the chlorite mineral extraction accuracy are improved.

The application discloses a hyperspectral-to-multispectral image conversion method and system based on a self-derived model, and belongs to the technical field of remote sensing image processing, and solves the problem of strong dependence on external high-resolution information in the prior art. A single low spatial resolution hyperspectral image data cube is acquired, and a plurality of band groups and a single-band low-resolution observation image are obtained; based on the band groups and the single-band low-resolution observation image, a cross-band joint degradation model and a variational energy functional are constructed; a variational method is used to convert a minimization problem of the variational energy functional into Euler-Lagrange equations; the Euler-Lagrange equations are solved to obtain preliminary high-resolution reconstruction images; and characteristic components of the plurality of preliminary high-resolution reconstruction images are extracted and synthetically reconstructed to obtain a high-resolution multispectral image. The application realizes effective enhancement of spatial details of a hyperspectral image without depending on external high-resolution images as prior information or input.

Wireless communications may include improved flexibility for spectrum utilization. Spectrum utilization may be improved by deriving a flexible or soft band from a combination of multiple bands. The combination may be with bands with the same or different kinds of duplex mode. The flexible or soft band may be utilized in single band operation or by a single cell despite being a combination of bands.

This wavelength conversion apparatus is capable of handling ultra-wideband optical signals, reduces the need for replacement of an optical device when the transmission band of an optical signal to be handled is extended, and also improves the wavelength resolution of the optical device. The wavelength conversion apparatus converts the wavelength of an optical signal by a combination of a wavelength selective switch 21-C and a wavelength converter 23-C that are each configured as a single band-capable optical device, and a wavelength band converter 22 that collectively converts wavelength bands. The wavelength conversion apparatus can handle the input of all of an input optical signal of a single wavelength within a specific wavelength band or an arbitrary wavelength band, a single-band WDM optical signal, and a WDM optical signal spanning a plurality of bands. A control mechanism is used to select an optical device to be used according to the situation and adjust the control parameter of each optical device. The wavelength resolution of the switch is improved by adopting the single band-capable optical devices. Wide-band wavelength conversion is facilitated in combination with the wavelength band converter.

This invention discloses a method and apparatus for soil salinity inversion based on a hybrid generative adversarial network (GAN). The method includes: constructing dual-band and tri-band features for each soil sample, and calculating a second spectral index for each dual-band and a third spectral index for each tri-band; selecting dual-band features based on a first Pearson correlation coefficient and a preset threshold, and selecting tri-band features based on a second Pearson correlation coefficient and a preset threshold; training the hybrid GAN using single-band features, a first coordinate, and a first spectral index; and generating multiple first synthetic spectral samples and second coordinates based on the selected dual-band features, second spectral index, first coordinate, selected tri-band features, and third spectral index. This invention improves the quality, diversity, and quantity of the second synthetic spectral samples, solves the problem of weak generalization ability of the best-performing soil salinity prediction model, and improves the accuracy of soil salinity prediction by the best-performing model.

The application provides a double-channel light path spectrometer system based on a colorimetric temperature measurement principle, and relates to the field of infrared radiation temperature measurement of aero-engine turbine disc. The double-channel light path spectrometer system comprises a double-band collimating lens group, a dichroic mirror group, a two-way single-band focusing lens group and a light beam collector. The double-band collimating lens group, the dichroic mirror group and the focusing lens group are combined to complete collimation, beam splitting and focusing of incident light. The center wavelengths of two light paths after beam splitting are 2.1 microns and 2.3 microns respectively. Each detection band is selected with a suitable infrared detector to increase the measurable optical channel. Each band lens is fixed in a lens barrel mounting mode to reduce external environmental interference, keep the lens surface clean and the optical performance, and improve the stability and accuracy of the light path. The light beam collector for stray light absorption is added to reduce unnecessary reflected light interference on the system.

The application discloses a multi-band selection method of an infrared detection system based on a color ratio, and belongs to the fields of infrared detection and identification technology and infrared optical system design. Since an infrared detection and identification system of a single band obtains a small amount of information, a target cannot be detected by an infrared detection system or detection accuracy is reduced, multi-band detection and identification is a development trend, but a multi-band selection theory of the infrared detection system is not mature at present. In view of the above problem, the application provides a multi-band selection method of an infrared detection system based on a color ratio. Under the premise of fully considering the influence of detector noise on detection and identification, a target identification model based on a color ratio is provided, and a multi-band selection model of an infrared detector is derived on the basis. The method is suitable for multi-band design of a spectral spectrometer or a filter wheel spectrometer system.

The invention discloses a multispectral camera based on a single CMOS array sensor and an imaging method, and relates to the technical field of image processing. The multispectral camera comprises a single CMOS array sensor and a PCB control board. The single CMOS array sensor is provided with a plurality of pixels, adjacent pixels are taken as a group, coating and filtering are carried out according to wave bands, and detection signals of the wave bands are obtained; a control program is embedded in the PCB control board, and the PCB control board firstly preprocesses a detection signal to generate a meta-image; splitting the element image according to the pixel group to generate a multi-band image; interpolating the single-band image by adopting a cubic convolution method to obtain a full-resolution single-band image; and finally, a Gram-Schmidt algorithm is adopted to carry out fusion sharpening on the wave band with the low resolution based on the wave band with the high resolution, a multi-band image with the improved resolution is obtained, and therefore high-resolution multispectral output is achieved.