804 results about "Satellite image" patented technology

The invention discloses a battlefield target behavior prediction method capable of being guided by micro-physical representation and a thinking chain, and the method comprises the steps: obtaining satellite images, radar / communication detection and open source text multi-source time sequence data, completing the entity recognition, relation extraction and event detection, and constructing a dynamic space-time knowledge graph; the maneuverability, sensor detection, weapon range and terrain accessibility mechanism are micronized to serve as a physical consistency constraint embedded prediction model; generating an intention-action-result causal priori chain and parameterizing the causal priori chain into a computable structure; performing multi-branch long-time-sequence situation deduction, and outputting a future target behavior track and a scene probability; and evaluating and explaining by integrating the causal confidence coefficient, the physical consistency and the data goodness of fit, and giving a key event probability and situation evolution report. According to the method, unified modeling of semantic causal and physical constraints is realized, and the method has explainable, verifiable and robust prediction capabilities, and is suitable for target behavior prediction and command information system decision support in a complex environment.

The invention relates to the technical field of space governance, and discloses a multi-agent space collaborative governance method which comprises the following steps: processing multi-source heterogeneous data such as satellite images and sensor readings, establishing cross-type semantic association through a geographic space data embedding technology, generating a unified structured text after optimizing the satellite images through vLLM, and synchronizing the unified structured text to a central database; an agent role portrait is dynamically generated by the central server large language model based on a preset Prompt template, and generation does not depend on a fixed rule; then, selecting a target node in the edge-center architecture, disassembling a total task into sub-tasks, establishing semantic mapping, calculating a matching probability, and performing optimal distribution by a reward borrowing function; generating a governance scheme in a perception layer-decision layer-execution layer framework, and outputting a coded operation instruction; based on an execution feedback updating strategy, a multi-level mechanism is set, roles are automatically redistributed, and the governance continuity is guaranteed. According to the invention, the overall efficiency and reliability of space governance can be improved in the face of dynamic scenes or emergency situations.

The invention discloses a lightweight-based satellite landslide image intelligent detection method, device and equipment and a medium, and relates to the technical field of disaster detection, and the method comprises the steps: obtaining a whole-scene optical satellite image containing a landslide and a non-landslide region and landform auxiliary data; a dynamic segmentation strategy is adopted to carry out differential segmentation and standardized preprocessing on an image based on topographic data, and a standardized image is obtained. A target landslide image is screened through a double-layer machine learning model, the target image is input into an improved lightweight convolutional neural network for processing, an initial detection result is obtained, finally edge optimization and coordinate calibration are performed on the result, and an accurate landslide area detection result is output. The identification precision of the landslide image is effectively improved through dynamic segmentation and double-layer screening, the improved lightweight convolutional neural network realizes efficient detection in a low-resource environment, and the accuracy of a landslide detection result is further improved.

The invention provides a desertification monitoring grading and vegetation extraction method and system, and relates to the field of desertification remote sensing monitoring and ecological assessment, and the method comprises the steps: selecting a multi-temporal satellite image and an unmanned aerial vehicle image which cover a full research region according to a preset condition, and carrying out the data preprocessing of the multi-temporal satellite image and the unmanned aerial vehicle image; the method comprises the following steps: constructing a desertification difference index by fitting a feature space of a vegetation index and a surface albedo by using a multi-temporal satellite image, grading the desertification degree of a research area to obtain a grading result, and locking a key monitoring area in the research area according to the grading result; a vegetation sample image of a key monitoring area is obtained from an unmanned aerial vehicle image, HSL color space conversion and hue optimization processing are carried out on the vegetation sample image, and a normalized vegetation index based on HSL is constructed, so that vegetation information of the key monitoring area is finely extracted, a key desertification disaster area is effectively positioned, and the accuracy of the desertification disaster area is improved. And vegetation information in the region is finely extracted.

The invention discloses a self-adaptive 4D Gaussian splashing high-precision three-dimensional reconstruction system and method, and belongs to the technical field of computer graphic processing. The invention aims to realize high-precision automatic registration of multi-source heterogeneous data and improve the calculation efficiency. The method comprises the following steps: collecting multi-source heterogeneous data; constructing a multi-modal fusion registration method, which comprises the following steps: combining satellite image data and low-altitude oblique photography data to realize spatial distribution geometric coarse registration, fusing low-altitude laser radar point cloud data and ground acquisition vehicle laser radar point cloud data to realize luminosity fine registration, establishing semantic features to assist registration, and obtaining registered multi-source data; initializing a 4D Gaussian primitive and executing adaptive splashing reconstruction to obtain an optimized 4D Gaussian splashing model; designing a cloud edge cooperative computing architecture oriented to 4D Gaussian splash reconstruction, and performing distributed parallel processing on the obtained optimized 4D Gaussian splash model; and executing quality evaluation and adaptive optimization, and outputting a final adaptive 4D Gaussian splash model.

The invention relates to the technical field of value accounting, and discloses an ecological system total production value accounting method based on GIS spatial analysis, and the method comprises the steps: carrying out the accounting of regional basic data and satellite image data, and constructing a bidirectional dynamic semantic mapping library corresponding to land change investigation land parcel classification-ecological system type; internet of Things monitoring data and statistical report data are obtained, and a standardized data set is obtained through space-time fusion of spatial interpolation-boundary correction and a sliding window smoothing method; constructing an urban area-typical district double-level accounting index system, and synchronously calculating a real object quantity and a value quantity; a model correction factor is called based on a GIS, indexes are quantified to grid units, a result is obtained through neighborhood analysis, and after parameters are calibrated, a multi-year ecological value trend map is generated in combination with the GIS; and outputting a customized result according to scenes such as ecological compensation, and outputting a final result after the customized result is qualified through three-level quality control verification. According to the method, the requirements of practical affairs such as ecological compensation and EOD projects on accounting precision and practicability can be met.

The invention discloses a farmland precise fertilization control method based on multi-source data fusion and deep learning, and the method comprises the steps: obtaining the multi-dimensional heterogeneous data of a target farmland in real time, including the crop spectrum time series data of a satellite image, the ion concentration data collected by a soil sensor network, and the microenvironment time series monitored by a meteorological station; and constructing a Delaune triangulation network spatial index, and re-sampling satellite image data to be matched with a soil sensor network space. Calculating a time-varying mutual information entropy, extracting related microenvironment parameters as coupling factors, combining the coupling factors with soil basic parameters to form a three-dimensional feature matrix, and converting the three-dimensional feature matrix into a growth period feature vector fused with time-space correlation; the collaborative decision model is input, the main branch predicts the basic fertilization amount, the auxiliary branch detects the ion concentration space mutation area and corrects the fertilization amount, a fertilization control instruction is output, and the fertilization device is controlled to conduct precise fertilization. The problem that fertilization control cannot be accurately and efficiently performed on farmland in the prior art is effectively solved.

The invention relates to an urban live-action three-dimensional construction method based on a high-resolution satellite image. The method comprises the following steps: carrying out stereo image pair screening and stereo image pair preprocessing on a high-resolution multi-view satellite image; carrying out adjustment optimization based on a rational function model on the satellite stereo image pair; generating an epipolar ray image based on the optimized rational function model; performing dense matching on the epipolar line image by combining building edge straight line segment constraint and an MGM algorithm to generate a disparity map; generating a three-dimensional point cloud and a three-dimensional model formed by a plurality of stereo image pairs through forward intersection based on the disparity map and the optimization parameters; generating a digital elevation model, a digital surface model and a three-dimensional Mesh model based on the three-dimensional point cloud; and carrying out precision evaluation and integrity evaluation by adopting pixel proportions of plane precision, elevation precision and height difference. According to the method, the urban live-action three-dimensional model and the corresponding digital product can be constructed quickly, efficiently and accurately by using the high-resolution satellite image.

The invention provides a satellite image and actually measured RSRP fused ground radio map generation system, and the system comprises a satellite image feature extraction module which is used for converting a high-resolution satellite image of a target region into high-dimensional image features reflecting the ground feature type distribution of the region; the base station physical characteristic input module is used for converting the physical parameters of the communication base station in the target area into characteristic vectors reflecting electromagnetic propagation characteristics; the multi-modal fusion module is used for fusing the high-dimensional image features and the feature vectors to generate joint feature representation; the radio map decoder is used for generating a radio signal power plane distribution diagram of the target area through a decoding network based on the joint feature representation; and the ground RSRP correction module is used for correcting the radio signal power plane distribution diagram output by the radio map decoder so as to output a final radio signal power distribution result. According to the invention, the space-ground collaborative data source fusion is realized to improve the mapping precision.

The invention provides a building LOD2 model diffusion generation method and system based on multi-modal feature constraints, and belongs to the field of remote sensing image processing. According to the method, a three-dimensional polygon noise generation module MM2P-Init and a multi-modal feature constraint module MM2D-Control are mainly utilized to construct a diffusion model MMP-DiffNet, a noise reduction generation process from three-dimensional polygon noise to a building roof structure is realized, the influence of extraction precision of low-dimensional features such as points and lines on a building LOD2 model topology reconstruction process is reduced, and the construction efficiency is improved. And the precision of building LOD2 model construction by the satellite image is improved.

The invention relates to the field of remote sensing image processing and geological disaster monitoring, in particular to a goaf three-dimensional subsidence basin reconstruction system based on multi-source remote sensing image fusion, which comprises a heterogeneous data preprocessing module, a differential geometry-based data fusion module, a three-dimensional subsidence basin reconstruction module, a subsidence dynamic monitoring module and a virtual reality interaction module, the system innovatively introduces a differential geometry theory to solve the problem of heterogeneous fusion of a high-resolution optical satellite image, an SAR satellite image and airborne remote sensing Lidar point cloud data, maps multi-source data to a unified feature space through manifold learning, calculates an adaptive fusion weight through curvature analysis, constructs a multi-scale feature correlation matrix based on a geodesic line distance, and achieves the fusion of the high-resolution optical satellite image, the SAR satellite image and the airborne remote sensing Lidar point cloud data. A high-precision fusion image is generated, three-dimensional reconstruction is carried out in combination with subsidence basin geological parameters and a physical constraint method, it is ensured that a reconstruction result conforms to an actual subsidence physical rule, dynamic monitoring and virtual reality interaction of the subsidence process are achieved, and parameter adjustment and model optimization are supported.

The invention provides a seawall terrain extraction method and system fusing a vehicle-mounted laser point cloud and an inclination model. The method comprises the following steps: forming a seawall range according to a seawall vector diagram and a satellite image; dividing a seawall range into a vehicle-mounted laser radar acquisition range and an unmanned aerial vehicle oblique photogrammetry range; acquiring a vehicle-mounted laser point cloud collected by a vehicle-mounted laser radar, and performing preprocessing and precision optimization on the vehicle-mounted laser point cloud; obtaining oblique photography image data collected by a five-splicing camera carried by the unmanned aerial vehicle, and generating an oblique photography model and an oblique three-dimensional model point cloud; extracting edge line elements and angular point feature points of a common overlapping area in the inclined three-dimensional model point cloud and the vehicle-mounted laser point cloud, and performing point cloud fusion based on the edge line elements and the angular point feature points; filtering the fused point cloud to screen seawall terrain point cloud data; according to seawall terrain point cloud data, resolution-adaptive digital elevation models are constructed for different areas of a seawall, and seawall structure features can be accurately represented.

The invention discloses a cross-view-angle geographic positioning method for multi-scale frequency perception attention fusion, and relates to a cross-view-angle geographic positioning method for an unmanned aerial vehicle scene. The objective of the invention is to improve the cross-view-angle geographic positioning accuracy of an existing unmanned aerial vehicle scene. The method comprises the following steps of: 1, acquiring cross-view-angle image pairs in different scenes and corresponding geographic position label data sets; 2, constructing a cross-view multi-scale frequency perception attention fusion network model; 3, obtaining a trained cross-view multi-scale frequency perception attention fusion network model; 4, inputting a to-be-detected unmanned aerial vehicle visual angle image without a label and a satellite visual angle image with a label into the trained model, and outputting a feature vector of the unmanned aerial vehicle visual angle image and a feature vector of the satellite visual angle image by the trained model; and 5, selecting the position corresponding to the satellite image with the highest similarity with the unmanned aerial vehicle image as the geographic position of the unmanned aerial vehicle. The method is applied to the field of cross-view geographic positioning.

The invention provides a multi-modal alignment and cross-scale structure attention-based remote sensing image building extraction method, which comprises the following steps of: performing radiation correction and geometric correction on an original hyperspectral satellite image, and performing voxelization, normalization and registration with a hyperspectral corrected image on LiDAR point cloud data to respectively obtain the hyperspectral corrected image and LiDAR corrected data; deep features of the two types of correction data are extracted through a special encoder, and after dimension unification and channel attention screening, fusion features are obtained through fusion of a weighting and gating mechanism; multi-scale features are extracted from the fusion features through multi-receptive field convolution branch, and cross-scale enhancement features are obtained by combining cross attention and geometric modeling; a prediction edge graph is generated based on cross-scale enhancement features, high-resolution guide features are combined to compensate tiny building information, and the extraction precision is improved through edge loss optimization; and carrying out denoising, edge repairing and adhesion separation on the optimized result to obtain a final building extraction result.

The invention discloses a remote sensing image low-frequency noise correction method and system, relates to the field of remote sensing image processing, realizes accurate removal of stripe noise under the condition of reducing satellite image detail loss, and relieves the problems of unstable correction effect, easiness in losing image details, difficulty in accurately depicting prior characteristics and the like of the existing remote sensing image low-frequency noise correction technology. The remote sensing image low-frequency noise correction process takes a column mean value or a row mean value as a basic processing unit; fine noise intensity calibration is carried out; low-frequency noise of the image is corrected in a mean value compensation mode, and detail loss of the corrected image is avoided. The method is suitable for multispectral and panchromatic remote sensing images of a remote sensing satellite, and is not influenced by ground feature types.

The invention relates to an earth surface deformation detection and classification method and system fusing CNN and SBAS-InSAR technologies, and the method comprises the steps: obtaining high-precision deformation data through a small baseline subset and an interference synthesis radar technology (SBAS-InSAR), constructing a CNN classification frame through combining PCA-enhanced optical satellite images, elevation, soil physical parameters, geological landform maps and other multi-source geographic information, and carrying out the detection and classification of the earth surface deformation through the CNN classification frame and the SBAS-InSAR technology. And identification of deformation types such as landslide, settlement and lifting is realized. The process comprises multi-source satellite data acquisition and preprocessing (including InSAR sight velocity decomposition and optical / topographic feature extraction), generation of a preliminary deformation label based on a classification algorithm of a gradient and a deformation velocity threshold, and recognition of a deformation type through a multilayer CNN model. According to the method, the deformation mode is automatically clustered and analyzed in a large-range area, the accuracy and detail performance of deformation type recognition are remarkably improved, the accuracy rate reaches 93%, the method is superior to a traditional method, a stable and extensible tool platform is provided for geological disaster monitoring, and positive risk management of landslide or land subsidence prone areas is assisted.

The invention provides a K8S-based satellite image recognition resource dynamic elastic scheduling system. The system comprises a task perception module, a resource evaluation module, an elastic scheduling module, a fault tolerance module and a learning optimization module. The task sensing module collects satellite image recognition task metadata and transfers the metadata to a priority label library; the resource evaluation module monitors node resources, quantifies the health degree and screens healthy nodes into a candidate pool; the elastic scheduling module executes Pod dynamic capacity expansion and contraction and other decisions according to tasks and resources; the fault-tolerant module identifies the fault Pod, reconstructs and distributes a new Pod according to an anti-affinity rule; the learning optimization module optimizes the system parameters according to the historical data. The invention also provides a dynamic elastic scheduling method. Therefore, the resource utilization rate and the system stability of the satellite image recognition task are remarkably improved.

The invention belongs to the technical field of computer vision, and provides a cross-view image positioning method and system based on a semantic perception graph convolutional network, and the method comprises the steps: obtaining the multi-scale global features of each image (including an unmanned plane image and a plurality of satellite images) through a network parameter shared dual-branch feature extraction network; according to the multi-scale global features and the basis vector matrix, a semantic attention graph of each image and an attention sub-graph of the last layer are obtained through a multi-layer cascaded cross attention mechanism; constructing a dynamic adjacency matrix through a semantic attention graph, and obtaining topological structure features of each image by adopting a two-layer graph convolutional neural network; and calculating the cosine similarity between the unmanned aerial vehicle image and each satellite image through the multi-scale global features and the topological structure features, and obtaining the coordinate of the satellite image with the maximum cosine similarity as the coordinate of the man-machine image. According to the invention, high-precision and high-robustness autonomous positioning technical support can be provided for an unmanned aerial vehicle system.

The invention relates to a historical image-text-based three-dimensional ancient city model construction method and device, electronic equipment and a storage medium. The method comprises the steps of obtaining historical image-text data of a target city, the historical image-text data comprises related historical literatures of the target city in a specified period, an electronic ancient map corresponding to an ancient map drawn in the specified period, an electronic old map corresponding to an old map surveyed and mapped in the latest period from the specified period, and a shot satellite image; based on the historical image-text data, generating a city plane restored map of the target city in a specified period; extracting semantic information of the target city in a specified period from at least one kind of data in the historical image-text data, wherein the semantic information comprises city information of the target city in the specified period and attribute information of constituent elements; and generating a three-dimensional ancient city model of the target city in a specified period based on the semantic information city plane restoration map. Therefore, a high-precision and high-integrity three-dimensional ancient city model of the target city in the specified period can be constructed.

The invention discloses an adjacent foundation pit deformation prediction method for a dense building group and a support deformation prediction method, and the method comprises the steps: obtaining SAR satellite images of a to-be-processed region in a period of time sequence, and generating an image stack after registration; screening points of which the amplitude deviation indexes are lower than a threshold value as PS points; calculating the relative displacement sequence of each PS point, inverting the displacement variation and accumulating to obtain the accumulated settlement; before construction, a digital surface model (DSM) is generated through aerial survey of an unmanned aerial vehicle, feature points with stable displacement are recognized by combining SAR images, and the feature points are anchored to an absolute coordinate system of the unmanned aerial vehicle for correction. Therefore, permanent scatterer (PS) identification and time sequence analysis are carried out by utilizing SAR images of a long time sequence, absolute geographic reference is provided by a high-precision digital surface model (DSM) generated by aerial survey of an unmanned aerial vehicle, and reference correction is carried out on a relative displacement field acquired by the InSAR.

The invention provides a water chlorophyll a concentration inversion method and system based on multi-modal data and a lightweight model, and relates to the technical field of water environment remote sensing evaluation. The method comprises the following steps: firstly, acquiring a Gaofeng No.5 satellite remote sensing image, a sentinel No.3 satellite image and ground actual measurement data, and completing image preprocessing and water body pixel extraction; constructing a hyperspectral index and an aquatic vegetation index, and fusing the hyperspectral index and the aquatic vegetation index with the water body temperature, the pH environmental factors and the spectral reflectivity to form a multi-dimensional feature sample set; a core feature subset is obtained through random forest and XGBoost coupling feature selection, and a lightweight student model is trained based on knowledge distillation; and constructing a to-be-predicted feature sample for the to-be-predicted time phase image and the environment factor, inputting the to-be-predicted feature sample into the lightweight student model to obtain a chlorophyll a concentration predicted value, and generating a spatial distribution map and a quality control map layer. According to the invention, high-precision, low-redundancy and efficient deployment chlorophyll a concentration inversion is realized.

The invention belongs to the technical field of remote sensing, and discloses a wolfberry planting distribution high-precision remote sensing monitoring method based on multi-temporal fusion and spectral feature optimization. According to the method, a multi-temporal and multi-spectral satellite image is used as a data source, and preprocessing and multi-temporal image fusion are firstly carried out; the method comprises the following core steps: establishing a time sequence characteristic curve according to a unique phenological period (such as bare soil characteristics in a dormancy period and high vegetation coverage in a rapid growth period) of wolfberry; in a spectral domain, screening out a characteristic spectrum dimension combination with the highest discrimination degree between the wolfberry and other crops through a characteristic wave band optimization algorithm (such as vegetation index difference degree and red edge characteristics); and in combination with an object-oriented classification or deep learning classification model, constructing a space-time coupling classifier, and performing high-precision extraction and distribution mapping on the Chinese wolfberry planting region. The method can effectively solve the problem of confusion classification of Chinese wolfberry and similar ground features (such as other shrubs and orchards), and realizes rapid and accurate monitoring of Chinese wolfberry planting area and spatial distribution.

Satellite images have inherent geo-positional errors of orders a few meters. Corrections are achieved by adjusting a sensor model which maps ground coordinates of control features into image coordinates and establishing a correspondence between the ground and image features, in this case a road network. The ground coordinates are obtained from mobile pose points. To adjust the sensor model we rely on the fact that the roads are typically much more uniform than surrounding features, and therefore have smaller entropy. The sensor model is adjusted so that the image pixels, obtained from projecting ground coordinates of the mobile pose points onto the image, minimize the entropy of the pixels that represent the road network.

The invention discloses a geological deformation monitoring method and device based on remote sensing data, equipment and a medium. The method comprises the following steps: acquiring real-time multi-source remote sensing data corresponding to a target area of a transformer substation; carrying out fusion analysis based on the real-time multi-source remote sensing data, and extracting texture features corresponding to the external damage hidden danger target; based on the dynamic change model and the texture features, obtaining an external damage hidden danger probability distribution diagram and a man-made interference area corresponding to the external damage hidden danger target; acquiring surface deformation monitoring data of the target area based on the man-made interference area; optimizing the space reference of the SAR satellite image based on the Beidou positioning data to obtain a three-dimensional deformation field; constructing a live-action three-dimensional base map corresponding to the transformer substation, and generating an interactive visual report based on the live-action three-dimensional base map; according to the invention, wide-area intelligent identification of external damage hidden dangers of the transformer substation and high-precision three-dimensional monitoring of geological deformation are realized, and the real-time performance and reliability of collaborative analysis of multi-source data are improved.

A lake cyanobacterial bloom pixel level prediction method based on multi-source data fusion belongs to the technical field of algae prediction, and comprises the following steps: collecting lake pixel level multi-source basic data in a satellite image and carrying out preprocessing, calculating an algae index to generate a binary distribution product, carrying out space-time matching according to a zoning factor suitability parameter table, and carrying out prediction according to the zoning factor suitability parameter table. Inverting a blue-green algae proliferation rate and adjusting a factor weight; calculating a pixel comprehensive suitability degree; identifying a hysteresis effect factor through correlation analysis and causal test; screening a high impact factor through feature sorting, constructing a diffusion rule, extracting an initial water bloom pixel and determining a diffusion starting point; and constructing a neighborhood iterative diffusion model by using the space-time dynamic pixel-level suitability matrix, and iteratively simulating and outputting a pixel-level water bloom prediction map. According to the method, through multi-source pixel-level data standardization processing and partition threshold modeling, the coupling diffusion model is optimized in combination with the multi-source data, accurate water bloom prediction is achieved, and the space-time precision and practicability of pixel-level prediction are improved.

The invention relates to the technical field of satellite image processing, and discloses an improved CycleGAN SAR satellite image simulation generation method and system, and the method comprises the steps: obtaining a real optical satellite image data set and a real SAR image data set, placing the real optical satellite image data set and the real SAR image data set in a source domain and a target domain respectively, carrying out the preprocessing of the two domain images, and dividing the two domain images into a training set, a verification set and a test set; constructing an improved CycleGAN model of a forward and reverse mapping relation between the optical image and the synthetic aperture radar image, and integrating the improved adversarial loss and cyclic consistency loss to generate a total loss function of the model; performing unsupervised adversarial training on the model based on the improved loss function, and alternately updating parameters of a generator and a discriminator until the model converges; and inputting an optical image to be converted into the trained improved cyclic generative adversarial network CycleGAN model, outputting a simulated SAR image and performing post-processing enhancement, thereby solving the contradiction between the limitation of SAR satellite image acquisition and abundant optical image resources, and providing support for the application depending on the SAR image.

The invention relates to a GIS technology-based geographic information acquisition method, device and equipment and a medium, and the method comprises the steps: obtaining a satellite image, an unmanned aerial vehicle LiDAR point cloud and ground sensor data through multi-source geographic data acquisition, and generating a multi-source geographic data set and an environment parameter matrix; performing dynamic credibility evaluation on the environment parameter matrix to generate a credibility vector; carrying out self-adaptive weight distribution on the credibility vector in combination with an inherent error coefficient of the equipment to generate a dynamic weight vector; performing space-time fusion on the multi-source geographic data set and the dynamic weight vector, and generating a fused geographic information matrix through coordinate registration and weighted fusion; and finally, carrying out closed-loop distortion calibration based on the verification reference point, correcting a system error by using a credibility vector, and generating an optimized geographic information database. According to the method, measurement deviation caused by environmental factors can be effectively overcome, intelligent fusion and quality control of multi-source heterogeneous geographic data are achieved, and the application requirement of high-precision geographic space analysis is met.

The invention discloses a soil organic matter inversion method based on satellite image multi-pixel combination. The method comprises the following steps: acquiring satellite remote sensing data in a research area; preprocessing to obtain a data set; classifying the whole research area to obtain a plurality of subclasses; analyzing the obtained spectral features of each subclass, and performing end member extraction on each class based on an end member extraction algorithm to obtain geographic coordinates corresponding to the end members; arranging training sampling points and adding a plurality of verification points based on geographic coordinates obtained by end member extraction; actually measuring the soil organic matter content of the sampling point; performing data enhancement based on a multi-pixel mixing method to generate an expanded data set; establishing nonlinear mapping of the spectral characteristics and the organic matters; and performing spatial interpolation on the model predicted value, and drawing to obtain a soil organic matter distribution diagram. According to the method, inversion of the soil organic matter content is achieved through satellite remote sensing image features, the sampling frequency is greatly reduced, the laboratory detection cost is saved, pollution caused by chemical method detection is reduced, and meanwhile the transportability of the method is guaranteed.

The application provides a tea garden identification method and device based on satellite images, which comprises the following steps: determining a evergreen vegetation area of a to-be-identified area based on Sentinel-2 image data and Landsat image data of the to-be-identified area; and identifying a tea garden area from the evergreen vegetation area through a decision tree model; wherein the decision tree model is constructed based on the following features and the classification threshold values corresponding to the features: a tea leaf phenology feature index, a terrain feature, and a spectral index determined by a separability index, wherein the SI is used to reflect the spectral reflectance separability of the tea garden and other evergreen vegetation; wherein the tea leaf phenology feature index is determined by an enhanced vegetation index in month N and a land surface water index in month M; the SI between the enhanced vegetation index in month N and the land surface water index in month M is the largest compared with the SI between the EVI in any other month and the LSWI in any other month, and N and M are integers greater than 0 and less than 13.

The invention discloses a short-term photovoltaic power prediction device and method based on multi-mode collaborative attention. The method comprises the steps of obtaining historical photovoltaic power, numerical weather forecast and satellite image data and performing preprocessing; constructing a short-term photovoltaic power prediction model comprising an image feature extraction module, a time sequence data feature extraction module, a multi-modal fusion module and a time sequence prediction module, and training the model by using the preprocessed data; the method comprises the following steps: extracting image features from satellite image data through an image feature extraction module; a time sequence data feature extraction module captures time sequence features from the historical power generation power and the numerical weather forecast data; the image features and the time sequence features are fused through a multi-modal fusion module, and finally a final power prediction value is output through a time sequence prediction module; and the loss between the power prediction value and the real value is minimized. According to the method, key complementary information influencing photovoltaic output can be effectively captured, so that the precision and robustness of short-term power prediction are remarkably improved.