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51results about How to "Reduce the number of collections" patented technology

Three-dimensional calibration target-based multi-fisheye camera calibration device and method

The invention discloses a three-dimensional calibration target-based multi-channel fisheye camera calibration device and method and belongs to the camera calibration technical field. The method includes the following steps that: a three-dimensional coordinate system is established; each fisheye camera in a panoramic image pick-up module is utilized to acquire the images of two calibration plates in a calibration target which are located at different positions; an isometric projection distortion model is selected; the intrinsic parameters of the corresponding lens and extrinsic parameters between a lens coordinate system and all plane calibration plate coordinate systems are calculated; the rotation and translation matrix of the two plane calibration plate coordinate systems and a three-dimensional calibration target coordinate system is calculated; and the obtained intrinsic parameters and extrinsic parameters of the lens are nonlinearly optimized, so that the optimal intrinsic parameters of the lens and the optimal extrinsic parameters of the lens relative to each calibration plate coordinate system can be obtained. According to the method, the folding type calibration target is adopted to achieve the calibration of the intrinsic parameters and extrinsic parameters of each lens, so that high-quality calibration images can be obtained; the intrinsic parameters and extrinsic parameters of each lens are optimized according to the known position relationship between a three-dimensional calibration target and the lens, and therefore, the accuracy of camera calibration can be greatly improved.
Owner:CHANGSHA PANODUX TECH CO LTD

Method and device for generating decision tree in data mining system

The invention discloses to a method and a method for generating a decision tree in a data mining system. The main technical scheme comprises steps as follows: A, a data set is traversed and set, so as to determine the unclassified data set corresponding to every candidate unit on the current layer of the decision tree; B, the attribute value of the data attribute corresponding to every candidate unit is determined according to the determined unclassified data attribute; C, the decision tree branch of every unit is generated according to the determined attributed value; and D, whether the data in the unclassified data set corresponding to the lower unit of every decision tree branch is identical in the attribute value with the pre-determined set data attribute or not is judged respectively, the units with a negative judgment are determined to be candidate units of the next layer of the current layer, the next layer serves as the current layer, and the step A is carried out again, and units with a positive judgment are determined as the last unit of the branch respectively. By adopting the technical scheme, the times for traversing the data set is reduced, as a result, the computational efficiency is improved, and the occupation of system resource is lessened.
Owner:CHINA MOBILE COMM GRP CO LTD

Damage detection model training method and device, vehicle damage detection method and device, equipment and medium

PendingCN111667011AReduce the number of samples collectedImprove recognition accuracy and reliabilityFinanceCharacter and pattern recognitionSample imageBlockchain
The invention relates to artificial intelligence, and provides a damage detection model training method and device, a vehicle damage detection method and device, equipment and a medium. The method comprises the steps: inputting an obtained damage sample image into a damage detection model containing a first parameter, extracting damage features, and generating an intermediate convolution feature map; inputting the intermediate convolution feature map into a mask prediction branch model containing a second parameter; outputting a training result through the damage detection model according to the damage features, and obtaining a mask result through the mask prediction branch model; obtaining a first loss value through the first loss model, and obtaining a second loss value through the second loss model; obtaining a total loss value; and when the total loss value does not reach the convergence condition, iteratively updating the first parameter and the second parameter until the total loss value reaches the convergence condition to obtain a trained damage detection model. According to the invention, the damage type and the damage area can be quickly identified. The invention also relates to a blockchain technology. The damaged sample image can be stored in the blockchain.
Owner:PING AN TECH (SHENZHEN) CO LTD

Food data analysis method based on cloud computing

The invention belongs to the field of food inspection technology, and discloses a food data analysis method based on cloud computing. The food data analysis method based on the cloud computing includes the steps of photographing information of a food production process by a camera unit; processing, by a processing unit, information transmitted by the camera unit; the processing unit identifying the information through a built-in image identification and determination module; transmitting the processing unit information to a monitoring unit through a wireless routing unit; the monitoring unit monitoring the information transmitted by the routing unit through a network cloud server; sending out a warning prompt on illegal information; and carrying on multi-aspect control through data sharing between the network cloud server and the monitoring unit by using a mobile terminal. According to the invention, the supervision is greatly enhanced, a more accurate understanding of the processing process of a factory is gained, the processing process is more transparent, opportunistic and irregular production methods are eliminated, and black-hearted manufacturers are also restrained from producing harmful foods; and at the same time, the examination work is better facilitated.
Owner:湖北泰拓物联科技有限公司

High-speed evanescent field frequency shift super-resolution microscopic imaging system and imaging method

The invention discloses a high-speed evanescent field frequency shift super-resolution microscopic imaging system and imaging method, and the method comprises the steps: employing an on-chip light-emitting device to generate evanescent fields with three wavelengths transmitted in the same direction at the same time, and employing a color camera to collect a frequency shift image generated by the three-wavelength evanescent fields which illuminate in the same direction at the same time, wherein the three wavelengths correspond to frequency shift signals of three wave bands of red, green and blue, and the illumination of each wavelength has different frequency shift amounts. In the image reconstruction process, multi-wavelength information shot at the same time is separated out to be subjected to interpolation processing, and therefore sample information with different frequency shift amounts and different illumination directions is obtained. And finally, image reconstruction is carriedout, high-frequency and low-frequency spectrums of the sample in different directions are spliced by using a splicing algorithm in a spectrum space, and finally, a high-resolution image breaking through the optical diffraction limit of the traditional microscope is recovered. According to the invention, under the condition of sacrificing a certain image sampling rate, the image acquisition quantity of the evanescent field frequency shift super-resolution method can be effectively reduced, and the imaging speed is improved.
Owner:ZHEJIANG UNIV

A microblog information priority collection method based on multiple strategies

The invention relates to a microblog information priority collection method based on multiple strategies, which can timely and effectively obtain the information of a blogger by constructing a multi-strategy priority collection method under the condition of limited collection capability. The method comprises the steps of firstly, constructing a classification model to screen bloggers, removing junk bloggers, and dividing the remaining bloggers into three categories according to the number of microblogs and the number of fans; secondly, aiming at different types, constructing different acquisition strategies; clustering the blog sending time of the large V bloggers, and extracting the optimal collection time of the large V bloggers; and through the microblog statistics of the bloggers, training a regression model, predicting the activity values of the bloggers, and sorting the bloggers according to the activity values; and finally, designing a multi-strategy microblog priority acquisition method by integrating the three types of acquisition strategies, and maintaining the timeliness of the acquisition strategies by periodically updating the acquisition queue. Experiments show that the hotspot microblog information can be effectively obtained in time, and the collection number is greatly increased.
Owner:BEIJING UNIV OF TECH

Vehicle damage detection model training method and device, vehicle damage detection method and device, equipment and medium

The invention relates to the field of artificial intelligence classification models. The invention provides a vehicle damage detection model training method and device, a vehicle damage detection method and device, equipment and a medium. The method comprises the following steps: inputting a vehicle loss sample set containing vehicle loss sample images into a vehicle loss detection model for training, extracting loss texture features through the vehicle loss detection model based on InceptionV4 model architecture, and obtaining at least one prediction result; obtaining an identification resultthrough adoption of a GIOU method and a soft-NMS algorithm; determining a first loss value through a GIOU loss algorithm, and determining a second loss value through adoption of a multi-classification cross entropy method; determining a total loss value according to the first loss value and the second loss value; and when the total loss value does not reach the preset convergence condition, iteratively updating the initial parameters of the vehicle loss detection model until the total loss value reaches the preset convergence condition, and recording the converged vehicle loss detection modelas a trained vehicle loss detection model. According to the invention, the vehicle damage type and the vehicle damage area can be quickly identified.
Owner:PING AN TECH (SHENZHEN) CO LTD

High-sensitivity weak fluorescence signal detection system and method, storage medium and application

The invention belongs to the technical field of biomedical imaging, and discloses a high-sensitivity weak fluorescence signal detection system and method, a storage medium and application. The high-sensitivity weak fluorescence signal detection system comprises a front fluorescence signal collection module for collecting a weak fluorescence signal, filtering a stray light signal and transmitting the fluorescence signal to a multi-channel space coding module in a blocked way, the multi-channel space coding module for performing block multi-channel space coding on the weak fluorescence signal transmitted by the front fluorescence signal collection module, an array weak signal detection module used for collecting a fluorescence signal coded by the block multi-channel space, converting the fluorescence signal into an electric signal and sending the electric signal to a control and calculation module, and the control and calculation module comprising a control unit and a calculation unit. According to the high-sensitivity weak fluorescence signal detection system, a multi-channel coding strategy is introduced; and in comparison with a space coding single pixel with fluorescence imaging technology, the number of collected fluorescence signals is reduced, and the collection time of weak fluorescence signals and the system imaging time are reduced.
Owner:XIDIAN UNIV

A high-speed evanescent field frequency shift super-resolution microscopic imaging system and imaging method

The invention discloses a high-speed evanescent field frequency-shifting super-resolution microscopic imaging system and imaging method. An on-chip light-emitting device is used to simultaneously generate evanescent fields of three wavelengths transmitted in the same direction, and a color camera is used to simultaneously illuminate the three wavelengths in the same direction. The frequency-shifted images generated by the wavelength evanescent field are collected, and the three wavelengths correspond to the frequency-shifted signals of red, green, and blue bands, and each wavelength illumination has different frequency-shifted amounts. In the process of image reconstruction, the multi-wavelength information captured at the same time is separated and interpolated separately, thereby obtaining sample information with different frequency shifts and different illumination directions. Finally, image reconstruction is carried out, and the high-frequency and low-frequency spectra of different directions of the sample are stitched together using a stitching algorithm in the spectral space, and finally a high-resolution image that breaks through the optical diffraction limit of a traditional microscope is restored. In the case of sacrificing a certain image sampling rate, the present invention can effectively reduce the number of images collected by the evanescent field frequency shift super-resolution method and improve the imaging speed.
Owner:ZHEJIANG UNIV

Waste oil recovery and flow direction supervision method

The invention discloses a waste oil recovery and flow direction supervision method. The waste oil recovery and flow direction supervision method comprises the following steps of S1, scanning a code and registering by a user, uploading equipment operation data, and archiving in a supervision background; S2, collecting waste oil; S3, measuring the content of the waste oil; S4, uploading metering data to the supervision background; S5, dispatching staff to recover the waste oil; S6, confirming the recovery cost; and S7, performing statistical management on the quantity and the amount of the recovered waste oil; According to the waste oil recovery and flow direction supervision method provided by the invention, paid recovery can be carried out on the waste oil after oil-water separation, the willingness of merchants to treat waste by themselves is improved, the recovered waste oil can be used for producing biodiesel, various pressures of municipal environmental sanitation are reduced, theenvironment is greatly protected, the problem of difficult recovery of kitchen waste in small and medium canteens and restaurants is solved, the waste collection times and disposal cost are greatly reduced, supervision background data can also provide remote supervision data for government functional departments, and whether the restaurants perform source processing on waste generated by the restaurants or not is judged.
Owner:成都洪蒙环保科技有限责任公司

Data query method and device in database, equipment and storage medium

The embodiment of the invention discloses a method, a device and equipment for querying data in a database and a storage medium. The method comprises the following steps of analyzing a received querystatement; determining the query quantity of the data tables in the to-be-queried table set of the query statement when the query statement has the were filtering condition; when the query quantity iswithin a preset quantity range, optimizing statements associated with a target data table in the query statements according to preset statement conversion conditions and statement conversion rules for the target data table selected from the to-be-queried table set to obtain optimized query statements, therefore, data query is carried out according to the optimized query statement, the problem that when multiple data tables are queried, when the number of the data tables exceeds the upper limit of the table number of the sets, the multiple sets need to be divided for query is solved, rapid query of data can be achieved without dividing the data tables into the multiple sets, and cost estimation does not need to be carried out multiple times. The method is advantaged in that processing complexity is reduced, resources are saved, and the query speed is increased.
Owner:SHANGHAI DAMENG DATABASE

An Interactive Modeling Method for Real Trees Based on Sparse Images

The invention relates to a method for real tree interactive modeling based on sparse images. The method comprises the steps that an interactive branch extracting and reconstructing module starts from the sequence of n images forming an angle of 90 degrees with an input overlay tree, data of two-dimensional center positions and the diameters of branch nodes of all levels are interactively compiled and stored in the image 1, a branch hierarchical structure is established, the image 1 is searched for the corresponding position of a main branch on the image n with the middle images 2 to n-1 serving as references, the corresponding position of the main branch is marked, interactive compilation is conducted on the image n, and depth information corresponding to the branch node of each level in the image 1 is determined; according to the extracted information of the two-dimensional center positions, the depths and the thicknesses of the branch nodes and based on a branch space bounding box, perspective correction is conducted; a final three-dimensional model is generated by a leaf generating module according to the phyllotaxis rule in the phytology. According to the method, the reconstructed tree model is similar to a real tree form, the topological structure of the branches can be well maintained, and three-dimensional reconstruction of the tree on a common accuracy level is achieved.
Owner:NORTHWEST A & F UNIV

A Multi-Strategy Based Microblog Information Priority Collection Method

The invention relates to a multi-strategy-based microblog information priority collection method. In the case of limited collection capability, by constructing a multi-strategy priority collection method, blogger information can be obtained in a timely and effective manner. First of all, the bloggers are screened by building a classification model, spam bloggers are eliminated, and the remaining bloggers are divided into three categories according to the number of microblogs and the number of fans. Second, construct different collection strategies for different categories. By clustering the posting time of the big V bloggers, the best collection time of the big V bloggers is extracted; through the microblog statistics of the bloggers, the regression model is trained and the blogger’s activity value is predicted. According to the activity value, the Bloggers sorted. Finally, a multi-strategy microblog priority collection method is designed by synthesizing the three types of collection strategies, and the timeliness of the collection strategy is maintained by regularly updating the collection queue. Experiments show that the present invention can not only acquire hot microblog information in a timely and effective manner, but also greatly increase the number of acquisitions.
Owner:BEIJING UNIV OF TECH

Slope leveling method, device and equipment based on GNSS single-antenna satellite

The invention discloses a slope shaping method based on a GNSS single-antenna satellite. The method comprises the steps of: receiving plane coordinate information of a starting collection point and plane coordinate information of an end point collection point, receiving steepness information of a slope to be measured, wherein the extension direction of a straight line determined by the starting collection point and the end point collection point is the same as the projection of the extension direction of the slope to be measured on the horizontal plane; determining a reference equation; determining a vertical line equation; obtaining plane coordinate information of a facade reckoning point; and determining a slope equation according to the plane coordinate information of an initial acquisition point, the plane coordinate information of an end point acquisition point, the plane coordinate information of the facade reckoning point and the steepness information, and carrying out slope preparation. According to the invention, the process is simplified, and the requirement of measurement on a GNSS system is reduced. The invention further provides a slope shaping method, device and equipment based on the GNSS single-antenna satellite and a computer readable storage medium, wherein the slope shaping method, device and equipment have the advantages.
Owner:SHANGHAI ALLYNAV TECH CO LTD

A slope adjustment method, device and equipment based on GNSS single-antenna satellite

The invention discloses a slope shaping method based on a GNSS single-antenna satellite. The method comprises the steps of: receiving plane coordinate information of a starting collection point and plane coordinate information of an end point collection point, receiving steepness information of a slope to be measured, wherein the extension direction of a straight line determined by the starting collection point and the end point collection point is the same as the projection of the extension direction of the slope to be measured on the horizontal plane; determining a reference equation; determining a vertical line equation; obtaining plane coordinate information of a facade reckoning point; and determining a slope equation according to the plane coordinate information of an initial acquisition point, the plane coordinate information of an end point acquisition point, the plane coordinate information of the facade reckoning point and the steepness information, and carrying out slope preparation. According to the invention, the process is simplified, and the requirement of measurement on a GNSS system is reduced. The invention further provides a slope shaping method, device and equipment based on the GNSS single-antenna satellite and a computer readable storage medium, wherein the slope shaping method, device and equipment have the advantages.
Owner:SHANGHAI ALLYNAV TECH CO LTD
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