30 results about "Plant species identification" patented technology

The invention provides a plant species identification method based on a digital image. The method comprises the following steps: collecting a plant organ digital image as a test sample, and extracting a characteristic vector; inputting the characteristic vector into a first stage classifier, and obtaining first n species in a vote number ranking, wherein n is larger than 3 and smaller than 10; the first stage classifier is obtained through the following modes: carrying out classifier training based on a characteristic set of all training samples; inputting the characteristic vector into a second stage classifier, and obtaining an identification result; the second stage classifier is obtained through the following modes: extracting a characteristic set corresponding to the n species from the characteristic set of all training samples to carry out classifier training. According to the invention, through a grading SVM classifier, sensitivity of the classifier to sample kind quantity is effectively reduced, influence of sample species increase on identification accuracy is eliminated, a problem of low accuracy of large sample size identification by the SVM classifier is overcome, and plant identification accuracy is raised.

The invention discloses a larimichthys crocea genome-wide SNP and InDel molecular marker method based on double enzyme digestion. The method comprises the following steps: 1) joint sequence design; 2) genome DNA enzyme digestion; 3) joint sequence connection; 4) sample mixing and PCR amplification; 5) high-throughput sequencing; 6) SNP locus excavation and analysis through sequencing data. According to the method, the modern molecular biology and the advanced high-throughput sequencing technology are combined, the method of combination of EcoRII and NlaIII double enzyme digestion is used, the genome-wide DNA molecules are subjected to enzyme digestion, DNA segments with certain lengths are obtained for carrying out library establishment sequencing and SNP molecular marker excavation, and the uniformly distributed genome-wide SNP locus information is obtained; the workload and cost of genome-wide marker analysis are greatly reduced, and the method is also applicable to the genome-wide marker analysis of other species; the SNP marker excavated through the method is applicable to the study fields such as animal and plant species identification, species genetic genealogy analysis, germplasm resource genetic diversity analysis and genetic breeding.

The invention relates to a plant species identification method based on leaf and flower fusion for local discrimination of CCA, comprising the following steps: constructing two weighted adjacent graphs according to a double-view feature set comprising a leaf image and a flower image; Obtaining two dimensionality-reduced projection matrixes by enabling the adjacent samples in the class to be most correlated, enabling the adjacent samples between the classes to be most uncorrelated and enabling the correlation between leaves and flowers of the same species to be maximum; identifying plant species using a 1-NN classifier with a geodesic distance. According to the method, the idea of local discrimination embedding (LDE) is introduced into canonical correlation analysis (CCA); The method has the advantages that the identification is accurate, the performance is stable, the identification characteristics can be extracted from the two plant organs, the identification information and the datastructure can be well reserved, and the method is further popularized and applied on the basis.

The invention relates to the field of Chinese herbal medicine based original plant species identification technology, specifically to a method for identifying traditional She medicinal Shiliang herb tea based original species and related confusable species by the utilization of ITS2 fragments of ribosomal DNA and application thereof. A DNA barcode identification method of traditional She medicinal Shiliang herb tea based original species and related confusable species comprises the following steps: 1) DNA sample extraction; 2) PCR amplification of fragments containing ITS2 sequences; 3) splicing of PCR amplification products; 4) comparison of ITS2 sequences of multiple species; and 5) construction of phylogenetic tree based on the ITS2 sequences. The DNA extraction method of traditional She medicinal Shiliang herb tea based original species and related confusable species and the ITS2 preparation method can effectively solve the problems such as species identification of Shiliang herb tea and related species, development and utilization of germplasm resources, etc. The method of the invention has extensive applicability, is simple to operate, is easy to grasp and has high accuracy. By the method, rapid and accurate identification of the Shiliang herb tea based original species and related confusable species can be successfully realized.

The invention discloses a method for identifying walnut species by analyzing leaves based on gas chromatography-ion mobility spectrometry, and belongs to the technical field of plant species identification. The method comprises the following steps: obtaining a leaf sample of a walnut to be identified, performing liquid nitrogen treatment, and grinding the sample; analyzing volatile substances in the leaves by using gas chromatography-ion mobility spectrometry; and comparing the obtained volatile substance with a reference seed so as to obtain the walnut seed to be identified. According to the method, volatile substances such as terpenes, esters, aldehydes, alcohols and ketones in the walnut leaves are analyzed through gas chromatography-ion mobility spectrometry, a certain research basis is provided for development and utilization of walnut leaf resources, and technical basis and support are further provided for walnut seed identification.

The invention relates to the field of traditional Chinese medicinal material original plant species identification technology, specifically to a method for identifying leaf, root and fruit of traditional she medicine Rubi Radix et Rhizoma original plant and congeneric similar confusable species thereof by the utilization of ITS2 fragments of ribosome DNA and application thereof. The method for identifying traditional she medicine Rubi Radix et Rhizoma original plant and congeneric similar confusable species thereof on the basis of ITS2 sequence gene fragment comprises the following steps: 1) extraction of multiple rubus plant leaf, root and fruit DNA samples; 2) PCR amplification of fragments containing ITS2 sequence; 3) assembling of PCR amplification fragments; 4) comparison of ITS2 sequences of multiple rubus species; and 5) construction of a phylogenetic tree on the basis of ITS2 sequence. The method of the invention has extensive applicability, is simple and convenient to operate,is easy to master, has high accuracy, and can successfully realize efficient and accurate identification of Rubi Radix et Rhizoma original plant and congeneric similar confusable species thereof.

A computer-implemented method, computer program product and computer system (100) for identifying weeds in a farmland using a dual task convolutional neural network (120) having a topology of: an intermediate module (121) that performs a classification task associated with a first loss function (LF1); and a semantic segmentation module (122) that performs a segmentation task associated with a different second loss function (LF2). The intermediate module and the segmentation module are trained together in consideration of the first and second loss functions (LF1, LF2). The system performs a method comprising receiving a test input (91) comprising an image of a weed plant showing a crop plant of a crop species in a farmland and showing one or more weed species in the crop plant; predicting the presence of one or more weed species (11, 12, 13) present in the respective tiles; outputting the corresponding intermediate feature map to a segmentation module as the output of a classification task; generating a mask for each weed species as a segmentation output of the second task by extracting multi-scale features and context information from the intermediate feature map and serially connecting the extracted information to perform semantic segmentation; and generating a final image (92) indicating, for each pixel, whether the pixel belongs to a particular weed species, and if so, which weed species the pixel belongs to.

The invention discloses a disease and pest early warning method and device, computer equipment and a storage medium, and the method comprises the steps of obtaining IoT sensing time sequence data, andobtaining IoT dimension features; acquiring a lawn picture, and preprocessing the lawn picture to obtain a target picture; carrying out plant species identification on the target picture by utilizingan image identification algorithm, determining plant features according to the identified plant species, and then identifying focus features from the target picture according to the plant features; acquiring plant growth state data, and aggregating the focus characteristics, the IoT dimension characteristics and the plant growth state data to obtain time sequence multi-dimensional aggregation characteristic data; performing first similarity calculation on the time sequence multi-dimensional aggregation feature data and the historical pest and disease damage feature data; and comparing the calculation result with a preset similarity threshold, and outputting an early warning result according to a comparison result. According to the invention, the multi-dimensional time series data is predicted, so that effective early warning of outbreak of lawn diseases and insect pests is realized.

The invention provides a plant identification method based on elliptical Fourier descriptors and weighted sparse representation. The plant identification method is mainly and technically characterized by comprising the steps that leaf images are preprocessed, wherein all the colored leaf images are converted into grayscale images, the leaf images are separated from the background through an Otsu segmentation algorithm and converted into binary images, and small holes of the leaf images are eliminated through an erosion algorithm; edge detection is conducted by adopting a Canny edge detector; centroids of boundaries are calculated; the Fourier descriptors are calculated; a complete dictionary is constructured, wherein Fourier descriptor vectors of all leaf image data sets are divided into training sets and test sets, and the complete dictionary is composed of the Fourier descriptor vectors of all the training sets; and optimization is conducted by a weighted sparse representation classifier. According to the plant identification method, by adopting the elliptical Fourier descriptors, good robustness is achieved on noise and other factors, and by applying the weighted sparse representation classifier (WSRC) to plant species identification and particularly to a low-dimension space, the identification rate is obviously increased.

The invention discloses an analyzing and testing method for an unearthed ancient lacquer film. Different analyzing methods are adopted for different coatings of the lacquer film; firstly, the overall structure (such as layering as well as the color, the thickness and the content condition of each layer) of the lacquer film is observed by the aid of a microscope, and then plant species identification is performed on a residual matrix and a fiber layer by the aid of the microscope; XRD (x-ray diffraction) analysis is performed on a lacquer ash layer, and main components and chemical structures of the main components can be detected; infrared spectroscopic analysis is performed on a raw lacquer layer, and the lacquer film is identified; the constitution structure of a pigment of a pigment layer is determined with an XRF (X-ray fluorescence) and XRD combined method. Besides, testing means are relatively flexible for analysis of additives in each layer, crystalline substances such as quartz and the like can be analyzed through XRD, non-crystalline substances can be analyzed with the Raman spectrum, a firm foundation is laid for further research on the lacquer film, a theoretical basis is provided for restoration of the ancient lacquer painting technology, and a valuable reference is provided for conservation and renovation work.

The invention discloses a plant type identification method, and the method comprises the steps: extracting a leaf edge contour of a plant leaf image, and carrying out the rotation transformation of the leaf edge contour, and obtaining a leaf contour image; wherein the contour inclination angles of all the blade contour images are the same; extracting contour features from the blade contour image; wherein the contour features comprise any one or a combination of any several of a convex defect feature, a contour shape symmetry feature and a contour shape vector feature; and training a plant leaf classification model by using the contour features so as to execute a plant type identification operation by using the trained plant leaf classification model, thereby improving the accuracy of plant type identification. The invention also discloses a plant species identification system, electronic equipment and a storage medium, which have the above beneficial effects.

An embodiment of the invention provides a method and equipment for identifying plant species based on ITS2, wherein the method comprises the steps of acquiring taxology information and an ITS2 sequence of a to-be-identified plant, decomposing for obtaining a file for processing, extracting the ITS2 sequence and species note in the file for processing, by means of a hidden Markov model, positioningthe ITS2 sequence with the indefinite position, eliminating the ITS2 sequence which comprises more than three one-molecule nitrogenous base, and obtaining preprocessing data; clustering the preprocessing data, performing error elimination on the clustered data, obtaining final data, using the ITS2 sequence and the species note in the final data for constructing a database, and aligning the ITS2 sequence in the database for finishing plant species identification. The method and the equipment for identifying the plant species based on ITS2 according to the embodiment of the invention can realize accurate identification of the plant species in a relatively strict and complete plant species identification flow through high-flux sequencing technology.

The invention provides a blade feature extraction method and device, and relates to the technical field of computer image processing. According to the method, a target leaf is decomposed into M contour point sub-images with identification codes, then all the sub-images are input into a feature extraction model, and color texture features and contour features of the target leaf are extracted basedon all the sub-images. According to the scheme, the feature extraction model based on deep learning is adopted, the blade features can be automatically extracted, manual operation is simplified, and therefore the efficiency of extracting the blade features is improved. In addition, the color texture features and the contour features are combined, so that the plant species identification accuracy can be improved by utilizing the extracted leaf features.

The invention discloses a plant species identification method, system and device and a storage medium, and can be applied to the technical field of species identification. The method comprises the following steps: acquiring one-dimensional leaf hyperspectral reflectivity data; converting the one-dimensional leaf hyperspectral reflectivity data into a two-dimensional grayscale image; and inputting the two-dimensional grayscale image into a convolutional neural network model, and predicting to obtain a plant species identification result corresponding to the one-dimensional leaf hyperspectral reflectivity data. According to the method, after all the acquired one-dimensional leaf hyperspectral reflectivity data are converted into the two-dimensional gray level image, all the hyperspectral data are fully utilized, useful information is prevented from being omitted, then the two-dimensional gray level image is input into the convolutional neural network model, and plant species identification is carried out by utilizing the convolutional neural network model, so that plant species identification efficiency is improved. Therefore, the accuracy of a plant species identification result is improved.

The invention belongs to the technical field of molecular biology, relates to the field of plant species identification, and discloses a chloroplast genome sequence capable of specifically identifying populus species and a specific PCR amplification primer of the chloroplast genome sequence, the specific primer comprises 9 hypervariable regions in the populus chloroplast genome, including ccsA-ndhD, ndhC-trnV, ndhF-ccsA, psbM-trnD, psbZ-trnfM, rpoB-petN, rps15-ycf1, ycf1 and trnK-psbK respectively, and the nucleotide sequences of the 9 hypervariable regions are shown in SEQ ID NO.1-9. The invention aims to provide the 9 hypervariable regions of the chloroplast genome suitable for identifying the populus species and the specific primer of the chloroplast genome, the 9 hypervariable region sequences are combined, the populus species can be rapidly and accurately identified, and an effective DNA bar code is provided for identifying the populus species.