50 results about "Red edge" patented technology

The invention discloses a soil water and salt dynamic monitoring and quality evaluation method based on multispectral remote sensing, and relates to the field of geological monitoring, and the method comprises the steps: carrying out the scattering deviation correction and roughness correction of an observation spectrum through a satellite remote sensing image, an unmanned aerial vehicle multispectral image, a ground sample and meteorological driving data; the soil intrinsic reflectivity, the vegetation coverage component and the salt crusting component are obtained; a water-salt inversion model is established by combining thermal infrared and red edge wave band information, and multi-temporal soil volumetric moisture content and surface salinity index are inverted; by introducing meteorological conditions and vegetation dynamic characteristics, a water-salt coupling partial differential equation and a graph space-time constraint model are constructed, and continuous space-time distribution of soil water content and salinity is obtained; extracting salinity, moisture, vegetation response and soil health indexes, establishing a soil quality comprehensive evaluation model, and outputting high-risk plaques and a treatment priority sequence. The method realizes dynamic monitoring and quality grading evaluation of soil water and salt, and is suitable for saline-alkali soil treatment and ecological restoration.

The invention relates to the field of vegetation index monitoring, and discloses a method for monitoring solanum roselle based on a multi-spectral index change rate of an unmanned aerial vehicle, which comprises the following steps: acquiring multi-spectral image data of a target area under a continuous time sequence; extracting NDVI, GNDVI and red edge vegetation index change layers from the reconstructed time sequence multispectral image by adopting a self-adaptive spectrum calibration algorithm to obtain a vegetation index change rate initial map; the method aims at the spectrum confusion problem of the eggplant at different growth stages and peripheral plants in change rate expression. Carrying out deep fusion on the initial vegetation index change rate map and the growth fluctuation contour model, constructing a change rate anomaly response factor map layer, and outputting suspected distribution candidate regions of the solanum aureocauda var. Aureocauda var. Aureocauda; and combining the change rate evolution trend of the historical extension path with a neighborhood growth consistency index, and dynamically generating a high-confidence identification map of the solanum aureum. The method has the advantage of improving the change rate discrimination precision.

The invention relates to the technical field of image analysis, in particular to a vegetation fine classification and recognition method and system based on an unmanned aerial vehicle, and the method comprises the following steps: obtaining a multispectral image through the unmanned aerial vehicle, extracting red edge reflectivity, NDVI and gray-level co-occurrence contrast, generating a feature vector in a standardized manner, calculating neighborhood offset to obtain a dynamic weight, and combining the dynamic weight into a weighted vector; high discrete features are screened as effective channels, multi-scale clustering is carried out, center and region growth extension recognition is optimized, and a vegetation classification atlas is generated. According to the method, a neighborhood pixel feature offset dynamic weight mechanism is introduced, multi-spectral feature dimension contribution degree is adjusted in a self-matching mode, effective channels are screened based on full-image dispersion, redundant interference is eliminated, image pyramid multi-scale clustering and consistency constraint are fused, the complex vegetation boundary recognition capability is improved, dynamic weight and multi-scale optimization are coordinated, and the method is high in robustness and high in robustness. Sample dependence is reduced, and accurate distinguishing of spectrum similar vegetation is achieved.

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.

The invention relates to the field of remote sensing image processing, in particular to a farmland soil type classification-oriented remote sensing image data acquisition method, which comprises the following steps of: regularly acquiring remote sensing image data of a target area according to a preset period; obtaining a distance measure between any two pixel points in each remote sensing image, and segmenting each remote sensing image to obtain a ground feature region; analyzing the trend and the amplitude of each pixel point on the spectral curve, and determining the red edge expression degree of each pixel point; determining the vegetation growth performance degree of each pixel point; determining the farmland soil segmentation quality of each remote sensing image; and screening a to-be-classified image from all remote sensing images of the target area, screening a farmland soil area to construct a bare soil mask image, and performing farmland soil classification on a ground feature area in the to-be-classified image in combination with a neural network. According to the method, the farmland soil area in the remote sensing image is accurately divided, and the accuracy of farmland soil type classification is improved.

The invention discloses a rice nutrient accurate monitoring and fertilization decision-making system based on multi-source data fusion, particularly relates to the field of precision agriculture, and is used for solving the problems of nutrient monitoring deviation and inaccurate fertilization caused by spectrum saturation in a rice vigorous growing period. The method comprises the following steps of: acquiring red edges and near-infrared reflection from multiple angles, synchronously acquiring texture and structure images, fusing to generate an anti-saturation characteristic cube, outputting a peak period characteristic packet by phonological transition point space-time segmentation, eliminating saturation response to construct a separable nitrogen trace spectrum, and calculating the nitrogen trace spectrum. The method is realized by calculating an energy concentration ratio and a water layer confluence indicating quantity in a situation constraint graph, outputting a calibration coefficient to adjust a prescriptional graph, and finally combining a historical track and a microtopography check drop point to output an execution prescriptional graph, so that the peak period diagnosis precision is improved, excessive or insufficient fertilization is avoided, and efficient nutrient management is realized.

The invention discloses an intelligent monitoring, prevention and control system for tobacco brown spot, and relates to the technical field of agricultural disease monitoring and intelligent prevention and control. A lower canopy monitoring array, elevation thermal infrared and red edge near infrared imaging and spore sampling (fluorescent quantitative PCR / loop-mediated isothermal amplification) are used as inputs; fog drop deposition D, leaf surface water film W and spore concentration S are predicted through multi-modal alignment and a physical field generator; carrying out long sequence risk assessment by inputting a correlation state space model and superposing a liquid state self-correlation kernel, and carrying out long sequence risk assessment by using concentric wheel patterns and narrow yellow halo (rlt; 0.15) + near-infrared / short-wave infrared black mould layer triple discrimination and checking, and a prescription is formed by combining double-pulse triggering that leaf surface wetting is larger than or equal to 8 h or a spore index reaches a threshold. The prescription comprises night microclimate intervention, variable spraying and leaf thinning control; resistance rotation compliance is realized through prescription uplink pre-check and electronic control unit unlocking; based on row belt / Thiessen polygon scheduling, 36 h coverage is larger than or equal to 95%, the dosage and residues are reduced, and the hit rate and timeliness are improved.

The invention provides a method for monitoring the population density of rice planthoppers by an unmanned aerial vehicle for the field of agricultural pests. In order to solve the problems that rice planthoppers are seriously damaged and efficient monitoring methods are lacked, the method for monitoring the population density of the rice planthoppers by collecting rice multispectral images through an unmanned aerial vehicle is provided and is characterized in that the unmanned aerial vehicle is used for carrying a multispectral camera to collect rice canopy multispectral images, and the population density of the rice planthoppers is investigated; extracting green, red, red edge and near-infrared reflectivity and texture indexes of the rice canopy; utilizing a continuous projection algorithm to screen reflectivity and texture indexes sensitive to the rice planthopper population density, and utilizing the screened indexes to establish a rice planthopper population density monitoring BP neural network and a random forest model; performing unmanned aerial vehicle multispectral image acquisition on rice in a to-be-detected area, extracting spectral reflectivity and texture indexes, and inputting the spectral reflectivity and the texture indexes into the model to monitor the rice planthopper population density. According to the method, the unmanned aerial vehicle is used for collecting the multispectral image simply and quickly, the monitoring precision is high, and a new method is provided for monitoring large-area rice planthoppers.

The invention discloses a forest tree DBH (diameter at breast height) inversion method based on a multispectral remote sensing image, which relates to the technical field of remote sensing information inversion, and comprises the following steps of: performing radiometric calibration and geometric correction processing on original multispectral observation data, generating a standardized multispectral data set, and performing single tree identification and canopy segmentation processing to obtain a tree DBH (diameter at breast height); generating single-plant tree crown image data; combining the illumination direction features with the red-edge wave band and the near-infrared wave band, performing multi-scale feature analysis and fusion processing, and outputting canopy feature data; performing nonlinear processing and illumination correction on the canopy feature data to generate breast diameter prediction data; and carrying out space mapping and visual mapping processing on the diameter at breast height prediction data to generate a diameter at breast height distribution diagram result, carrying out precision evaluation and quality inspection processing, and outputting a forest tree diameter at breast height inversion result. The stability, the precision and the environmental adaptability of the breast diameter inversion are improved, and high-reliability technical support is provided for forest structure monitoring and resource evaluation.

The invention discloses a vegetation coverage index algorithm and system based on an unmanned aerial vehicle. The algorithm comprises the following steps: S1, data acquisition and multi-source data preprocessing; s2, dynamic environment correction and multi-source data fusion; s3, red edge enhanced vegetation index calculation and terrain correction; s4, vegetation coverage intelligent prediction and precision verification; and S5, result visualization and decision support: generating a vegetation coverage spatial distribution map and a statistical report, and supporting a resource management decision. By integrating the unmanned aerial vehicle, the multispectral imaging sensor, the dynamic environment correction model and the data fusion algorithm, efficient and high-precision technical support is provided for precision agriculture, ecological resource management and disaster monitoring.

The application discloses a rice nutrient precision monitoring and fertilization decision system based on multi-source data fusion, and particularly relates to the field of precision agriculture, and is used for solving the problems of nutrient monitoring deviation and inaccurate fertilization caused by spectral saturation during the rice vigorous growth period, and is achieved by the following steps: collecting red edge and near-infrared reflection from multiple angles, synchronously acquiring texture and structure images and fusing to generate an anti-saturation feature cube, outputting a vigorous growth period feature package by spatiotemporal segmentation at the phenological transition point, constructing a separable nitrogen trace spectrum by eliminating saturated response, outputting a prescription front graph by adjusting the balance coefficient under the calculation of energy concentration and water layer confluence indicators in a context constraint graph, and finally outputting an execution prescription graph by combining historical trajectories and micro-terrain to check the landing point, so that the vigorous growth period diagnosis precision is improved, over-fertilization or under-fertilization is avoided, and efficient nutrient management is realized.

The application discloses a kind of based on spectrum-process-terrain coordination's farmland low-lying quick extraction method of waterlogging, comprising the following steps: step one, satellite remote sensing image acquisition and pretreatment;Step two, waterlogging area grading mark;Step three, process quantity extraction;Step four, red edge area index calculation;Step five, terrain factor processing and feature combination;Step six, model training and optimal feature subset screening;The application is by constructing bare soil period soil moisture variation process quantity and growth period crop growth change process quantity, accurately depict the evolution track of waterlogging with growth stage, break through the limitation that single phase cannot reflect process difference;By constructing red edge area index, enhance the spectrum difference of waterlogging, distinguish bare soil period easily confused ground class, avoid growth period vegetation canopy shielding interference;Through terrain factor, reflect the influence of topography on water depth, holding water time length, improve the identification accuracy of waterlogging spatial heterogeneity;By using random forest algorithm, improve the accuracy of waterlogging grading.

The invention belongs to the field of composite material preparation, and relates to a preparation method of a flexible vegetation-imitating green leaf camouflage material, which comprises the following steps: doping chrome green Cr2O3 particles in a polydimethylsiloxane (PDMS) matrix to form a bottom film with the appearance color similar to that of green vegetation, and then coating a layer of film doped with Au or Ag and other metal nanoparticles on the bottom film to obtain the flexible vegetation-imitating green leaf camouflage material. Therefore, the wave modulation method based on surface plasmon enhanced absorption is realized, the material can imitate the reflectivity of green vegetation in a near-infrared band, PDMS is taken as a matrix and doped with chrome green particles, so that the color of the film is similar to that of a green plant macroscopically, Ag nanorods doped in the upper PDMS coating can enable the chrome green coating to imitate a red edge effect, and the reflectivity of the green vegetation can be simulated in a near-infrared band. Vegetation is simulated in a near-infrared band. The two layers of films are compounded, so that the camouflage material and the vegetation green leaves have the same color and spectrum, and the preparation method and the material have very wide application prospects.

The invention relates to the technical field of intelligent prediction of forest degradation, and discloses a forest degradation early warning platform fusing vegetation spectral features and reinforcement learning, and the platform comprises the steps: obtaining a satellite / unmanned plane image through a multi-source remote sensing data collection module; the spectral feature extraction module calculates a vegetation index, a red edge slope and a water stress index; the multi-feature fusion module integrates spectrum, texture and phenological features and outputs a degradation probability; the reinforcement learning prediction module constructs a state transition model and predicts a degradation gradient; the early warning decision module generates a dynamic early warning level based on the gradient value; the feedback optimization module updates network parameters through a loss function; therefore, the problems of difficult early recognition and early warning lag are solved, the recognition rate is improved by 40%, and the early warning response is shortened to 15 days.

The present application relates to the intelligent mining direction of remote sensing data, and particularly relates to a poplar single tree crown segmentation method, device and equipment based on aerial image. The method comprises the following steps: acquiring a first multi-spectral unmanned aerial vehicle aerial image, and preprocessing the first multi-spectral unmanned aerial vehicle aerial image; inputting the first multi-spectral unmanned aerial vehicle aerial image into a crown top identification model based on a D-LinkNet network to obtain a poplar crown top seed point graph; using a watershed segmentation algorithm based on label control, taking the poplar crown top seed point graph and a first band of the first multi-spectral unmanned aerial vehicle aerial image as inputs to perform calculation, and segmenting a poplar single tree crown based on the first multi-spectral unmanned aerial vehicle aerial image; wherein the first band is an infrared band or a red edge band.

The invention discloses a forest farm monitoring-oriented vegetation reflection spectrum measurement method and system, and the method comprises the steps: obtaining an original spectrum collection signal of a forest farm target region, carrying out the canopy penetration attenuation correction, and building a reference reflection spectrum set; performing crown projection area identification and atmospheric scattering interference identification on the reference reflection spectrum set to form a real earth surface reflection spectrum, and performing red edge feature positioning and waveband ratio analysis based on the real earth surface reflection spectrum to form a vegetation reflection spectrum index; performing multi-temporal spectrum difference detection on the vegetation reflection spectrum index, eliminating phenological interference, determining a change confidence interval, screening an abnormal spectrum based on the change confidence interval, performing forest stand health grade marking after spectrum evolution coefficient correction, and outputting a forest stand coverage change measurement result. The method can effectively eliminate the interference of canopy shadow and atmospheric scattering, distinguish normal phenological fluctuation from real health abnormality, and provide reliable spectral data support for monitoring the vegetation state of the forest farm.

The invention provides an urban tree species classification method, system and device, and belongs to the technical field of tree species classification, and the method comprises the steps: firstly, selecting candidate wavebands in a red-edge spectrum range, traversing all dual-waveband combinations, and defining a vegetation index through a preset formula; secondly, for each index, generating a vegetation mask by using a plurality of candidate thresholds, and calculating a confusion matrix evaluation index by comparing the vegetation mask with a real mask; and finally, based on the index, automatically screening out an index with optimal performance and a threshold pair. Wherein the index defined by the optimal dual-band combination is the final vegetation index, and according to the final vegetation index, classification and identification of urban tree species are carried out through a machine learning model. The method solves the problem that classification of the classic vegetation index on the urban tree species is not accurate.

The present invention relates to the field of vegetation index monitoring, and discloses a method for monitoring Solanum rostratum based on the change rate of drone multi-spectral indices, including obtaining multi-spectral image data of a target area in continuous time series; using an adaptive spectral calibration algorithm for the reconstructed time-series multi-spectral images to extract NDVI, GNDVI and red-edge vegetation index change layers, and obtaining an initial map of vegetation index change rates; aiming at the spectral confusion problem of Solanum rostratum at different growth stages and surrounding plants in terms of change rate performance; deeply fusing the initial map of vegetation index change rates with a growth fluctuation profile model to construct a change rate abnormal response factor layer and output candidate areas for suspected distribution of Solanum rostratum; combining the change rate evolution trend of the historical expansion path and the neighborhood growth consistency index, and dynamically generating a high-confidence identification map of Solanum rostratum. The present invention has the advantage of improving the discrimination accuracy of change rates.

The application discloses a kind of vegetation cover index algorithm and system based on unmanned plane, wherein algorithm includes the following steps: S1, data acquisition and multi-source data preprocessing;S2, dynamic environment correction and multi-source data fusion;S3, red edge enhanced vegetation index calculation and terrain correction;S4, vegetation coverage intelligent prediction and precision verification;S5, result visualization and decision support: generate vegetation coverage spatial distribution map and statistical report, support resource management decision.The application provides efficient, high-precision technical support for precision agriculture, ecological resource management and disaster monitoring by integrating unmanned plane, multispectral imaging sensor, dynamic environment correction model and data fusion algorithm.

The invention discloses a satellite inversion method for the canopy chlorophyll content based on a row-sowing rice geometrical optics-radiation transfer composite model, and the method comprises the steps: 1, simulating the spectral reflectance of rice canopies at an interval of 1 nm in different planting scenes based on agricultural priori knowledge through the row-sowing rice geometrical optics-radiation transfer composite model; 2, mapping the simulated canopy spectral reflectivity data set into a satellite image broadband canopy spectral reflectivity data set by using a spectral response function; step 3, constructing red edge chlorophyll index characteristics based on the simulated broadband reflection spectrum data set; and 4, establishing a hybrid inversion model between the red edge chlorophyll index and the paired canopy chlorophyll content CCC, and carrying out canopy chlorophyll content satellite inversion by using the hybrid inversion model to realize large-range rice chlorophyll content space-time dynamic monitoring. According to the method, the precision of the rice canopy chlorophyll content hybrid inversion model is remarkably improved in the early stage of rice growth.

The invention discloses a method for analyzing wheat phenological characteristics by using a hyperspectral image, and particularly relates to the technical field of remote sensing data processing, which comprises the following steps of: decomposing a pixel into a background component and a canopy component based on end member unmixing, and executing curvature projection correction in a moisture absorption band aiming at a wet soil end member in the background so as to obtain a corrected canopy reflection sequence; extracting red edge, near-infrared platform and short-wave infrared absorption characteristics through continuum normalization, and synchronously outputting chlorophyll-related characters, structure-related characters, water-content-related characters and derivatives thereof through a character inversion operator; based on a stage template library and sequence limited transfer graph search, transfer candidates are determined according to joint transition indication, red edge phase synergy indexes and water-containing structure unwrapping residual indexes are calculated, a confirmation set is formed through a phenological consistency judgment model and a phase consistency threshold value, a stage space distribution graph layer and a time sequence table are generated, and a stage space distribution graph layer is obtained. And inflection point positioning, robustness and mobility under cross-variety and cross-management are improved.

The present application belongs to the field of remote sensing monitoring and forestry resource management, and discloses an eucalyptus extraction method based on SWIR (short wave infrared) difference enhancement and eucalyptus canopy characteristic factor. The method first constructs a SWIR difference enhancement factor, uses the difference between the two bands of the short wave infrared reflectance of the Sentinel-2 multispectral satellite to extract the short wave infrared characteristics of eucalyptus, and at the same time constructs an eucalyptus canopy characteristic factor, which strengthens the spectral difference between eucalyptus and other vegetation by weighted fusion of red edge slope and near infrared enhancement characteristics. Then, the two types of factors are subjected to spatial regularization and Fisher-entropy thresholding to generate a preliminary mask, and the core eucalyptus area is extracted by intersection operation; then, morphological opening and closing operations and small area filtering are combined to eliminate noise and non-target interference, and a high-reliability extraction mask is obtained. The present application realizes efficient extraction of eucalyptus by relying on the advantages of the Sentinel-2 multispectral data, and is suitable for forestry resource monitoring and eucalyptus extraction verification.

The application discloses a kind of soil water salt dynamic monitoring and quality evaluation method based on multispectral remote sensing, it is related to geological monitoring field, the method includes by satellite remote sensing image, unmanned aerial vehicle multispectral image, ground sample and meteorological driving data, scattering correction and roughness correction are carried out to observation spectrum, obtain soil intrinsic reflectivity, vegetation cover component and salt crust component;Water salt inversion model is established in combination with thermal infrared and red edge band information, and multi-time phase soil volume moisture content and surface salt index are inverted;By introducing meteorological conditions and vegetation dynamic characteristics, water salt coupling partial differential equation and graph time and space constraint model are constructed, and the continuous time and space distribution of soil moisture content and salt is obtained;Salinity, water, vegetation response and soil health index are extracted, and soil quality comprehensive evaluation model is established, and high-risk patch and management priority order are output.The method realizes the dynamic monitoring and quality classification evaluation of soil water salt, and is suitable for saline-alkali soil management and ecological restoration.

The application relates to the technical field of remote sensing identification, and particularly provides a rape planting area identification method, a program product, an electronic device and a storage medium. The method comprises the following steps: acquiring multispectral imaging data of a target area; determining a pod stage identification index based on a corresponding relationship between a reflectivity difference parameter and the pod stage identification index; and determining a rape planting area according to a first identification index threshold value and the pod stage identification index of a pod stage period. The reflectivity difference parameter comprises a difference between near-infrared reflectivity and second red edge reflectivity, a difference between the second red edge reflectivity and red light reflectivity, and a difference between green light reflectivity and blue light reflectivity. The method can identify the rape planting area in the target area based on optical image data of the pod stage period, reduces the dependence of rape planting area identification on flowering period image data, thereby alleviating the problem of reduced identification accuracy caused by missing flowering period image data, and improving the identification accuracy of the rape planting area.

This invention relates to a method for preparing a jungle camouflage coating with a large near-infrared simulated water peak. Alizarin green intercalated hydrotalcite (ZnAl-LDHs-AG), bismuth vanadate (BiVO4), and SAR resin synthesized by co-precipitation are mixed in a mass ratio of 3:3:1 to obtain a composite green pigment. This pigment is then mixed uniformly with PVA adhesive and glycerol in a mass ratio of 1:1:1. Finally, the above solution is uniformly coated onto spandex fabric and dried at 160℃ for 10 min to obtain the jungle camouflage coating. The jungle camouflage coating prepared by this invention exhibits four major spectral characteristics: a green peak, a red edge, a plateau, and a water absorption peak, with a spectral similarity of 98.37% to that of green plants. This invention utilizes the synergistic water-locking system constructed by the introduction of SAR and glycerol, forming a stable hydrogen bond network that effectively locks in moisture in the coating, significantly enhancing the characteristic near-infrared water absorption peaks at 1400 nm and 1900 nm. The camouflage coating prepared by this invention is safe and environmentally friendly, has excellent weather resistance, and possesses thermal shielding properties comparable to natural green plants.

The present application relates to the technical field of spectral detection, and discloses a crop canopy light field spectrum data correction method and a nutrient detection device. The method comprises the following steps: collecting crop canopy hyperspectral data, removing the background by using an optimized soil to adjust the vegetation index after radiation correction; constructing a light field heterogeneity parameter model combined with a red edge response factor, determining a red edge modulation coefficient through iterative optimization of a clustering evaluation index; calculating the Euclidean distance from a pixel to the clustering center of strong and weak light to generate a fusion weight coefficient; constructing a differentiated benchmark correction model, and performing linear weighted fusion twice on the spectral data and the nutrient content calculated by the double regression model by using the fusion weight. Through the construction of the light field heterogeneity representation parameter and the soft segmentation strategy based on the distance weight, the smooth transition of the strong and weak light regions is realized, the spectral distortion caused by uneven light is eliminated, and the accuracy and robustness of the crop nutrient detection under complex light field are improved.

The application discloses a vegetation reflectance spectrum measurement method and system for forest monitoring, acquires original spectrum collection signals of a target area of a forest and carries out canopy penetration attenuation correction to establish a benchmark reflectance spectrum set, identifies a forest canopy projection area and atmospheric scattering interference of the benchmark reflectance spectrum set to form a ground true reflectance spectrum, carries out red edge feature positioning and band ratio analysis based on the ground true reflectance spectrum to form a vegetation reflectance spectrum index, carries out multi-time spectrum difference detection on the vegetation reflectance spectrum index and removes phenology interference to determine a change confidence interval, screens abnormal spectra based on the change confidence interval and carries out forest health grade labeling after correction by a spectrum evolution coefficient to output forest coverage change measurement results. The application can effectively eliminate the interference of forest canopy shadow and atmospheric scattering, distinguish normal phenology fluctuation from real health abnormality, and provide reliable spectrum data support for forest vegetation state monitoring.

This invention discloses a method and system for estimating and inverting forest stand volume using remote sensing images, relating to the fields of remote sensing image processing and forest resource surveys. The method includes: acquiring three-dimensional point clouds using UAV lidar and generating a canopy height model through progressive morphological filtering; extracting three-dimensional structural parameters; extracting texture features from near-infrared and red-edge bands of multispectral satellite imagery based on the gray-level co-occurrence matrix; fusing the three-dimensional structural parameters and texture features and adaptively filtering them through a closed-loop feature importance feedback mechanism; and constructing a stochastic forest regression model with measured ground volume as the dependent variable to perform pixel-by-pixel volume inversion and generate a spatial distribution map. This invention overcomes spectral saturation limitations and improves the estimation accuracy of high-volume forest stands.

The invention relates to the technical field of vegetation remote sensing recognition and ecological monitoring, and particularly discloses a remote sensing recognition method for tamarix chinensis of the Yellow River delta based on an improved vegetation index. According to the method, remote sensing data acquisition and preprocessing are carried out by adopting a multispectral remote sensing image, targeted improvement is carried out on a traditional vegetation index structure according to spectral characteristics of tamarix chinensis in a red-edge wave band, tamarix chinensis / non-tamarix chinensis samples are constructed and a characteristic data set is generated, and automatic distinguishing of tamarix chinensis and non-tamarix chinensis areas is realized by combining a dichotomy model. And completing tamarix chinensis space distribution identification and result output. According to the method, the normalized difference item of the red-edge wave bands RE1 and RE2 is constructed in a combined mode according to the spectral characteristics of the tamarix chinensis, and the improved vegetation index is formed through the combined multiplication of the normalized difference item and the NDVI, so that the distinguishability and classification accuracy of the tamarix chinensis and the reed are enhanced, and the key technical problems that targets are not prominent, and classification is inaccurate are solved.

The present application relates to satellite remote sensing image technical field, disclose a kind of seaweed distribution map drawing method and device, including obtaining the time series remote sensing image of to be identified area, based on water body index of each satellite remote sensing image therein, select sea-land separation boundary, construct time series marine area remote sensing image;Using multiscale segmentation method obtains multiple homogeneous patches in each marine area remote sensing image, and is classified;The region of all homogeneous patches belonging to marine water green plant type therein is obtained, as greenery area remote sensing image;Based on the red light band reflection value and the first vegetation red edge band reflection value of each greenery area remote sensing image, calculate submergence seagrass spectral index, to mark suspected seagrass pixel;The amplitude dispersion index of each suspected seagrass pixel point is calculated, and target seagrass pixel point is selected;Extract target seagrass pixel point of all greenery area remote sensing image in time series greenery area remote sensing image, and draw seaweed distribution map.