403 results about "Chain code" patented technology

A method of generating wallets for discrete blockchain networks comprising receiving a primary and a first secondary seeds, generating an enhanced hierarchical deterministic (HD) wallet, comprising deriving an enhanced parent public key and an enhanced parent private key from the primary seed, generating a first toughened HD wallet, comprising deriving a first toughened parent public and private key pair from the first secondary seed, deriving a first toughened primary child public/private key pair from a function including as inputs the first toughened parent public/private key pair, a first parent chain code, and the enhanced parent public key, and performing an identity registration and certification procedure for both the enhanced and the first toughened HD wallets. An identify of a user associated with each of the enhanced and the first toughened HD wallets is verifiable by an external blockchain network because of the identity registration and certification procedures.

The embodiment of the invention provides a block chain network service platform and a chain code installing method, a storage medium. The method comprises the following steps: storing a chain code mirror image compiled by an endorsement node by calling a container engine, wherein the endorsement node is located at a first service node of a container cluster, and the endorsement node is deployed through a block chain network service platform; when the chain node is installed, calling an application program interface service module of a management node of the container cluster, and requesting the management node to schedule the chain code container through the endorsement node, wherein the chain code container is located at a second service node of the container cluster; and scheduling the chain code mirror image to accomplish the installing of the chain node in response to an operation of requesting to search the chain node mirror image corresponding to the chain node container from a mirror image warehouse.

The invention provides a credible government administration data sharing network system based on a block chain. The system comprises service departments, an access layer and a block chain network, wherein the service departments perform information interaction with the block chain network via the access layer; the block chain network comprises a plurality of node servers, and the node servers arecorrespondingly connected with the service departments; the block chain network also comprises chain codes and a public account book based on the chain codes, wherein the public account book is used for dispersedly recording and storing the data of the service departments on the corresponding node servers, and each node server comprises the full amount of service data; the node servers are also separately connected with a management application platform used for interacting the data with the outside and a decryption server used for decrypting the data. The system provided by the invention hasthe advantages of high sate security, strong stability and high degree of opening.

The present invention includes a method for analyzing an image wherein elements defining a path within a two-dimensional image are received from a prescreener. A Sobel operator may be applied to the region around each of the elements of the chain to obtain a corresponding array of gradient directions. An angle correction may be applied to any of the gradient directions that goes beyond the highest value (in radian measure; the Pi −Pi transition), to obtain an array of gradient directions free of any artificial jumps in value. The gradient direction array (Sobel chaincode) can have its bandwidth taken to determine a single number of straightness so as to identify extremely straight edges, (manmade objects) from less straight edges (natural objects). A similar process can be used to analyze contours for straight sections, which are also parallel. These two and other filters applied to the gradient array can be part of a feature suite, for feature space analysis.

The invention discloses a method for detecting an unstructured road boundary on which an intelligent vehicle runs. The method comprises the following steps of: analyzing and processing frame data of a vehicle-mounted 64 line laser radar to obtain frame two-value raster data, expanding and corroding the frame two-value raster data to fill small space between data of barriers on the same side of a road and keeping the whole outline unchanged; solving the outline of each barrier target, storing in a chain code mode and solving the mass center of the outline; performing K means clustering on the barrier targets, wherein a sample is the solved mass center, the targets comprise barrier targets on the left side of the road and barrier targets on the right side of the road; and training by using a support vector machine (SVM), wherein the sample is the outline points of the classified barrier targets, thus obtaining a classifier, and finally solving a straight line section which describes theroad boundary according to the classifier, the maximum interval conditions and the raster data. In the method, data involved in calculation is reduced as much as possible; and the method is high in real-time property, and the solved road boundary accuracy rate is high.

The present application discloses an alliance blockchain system. A system asset chain code is added in the chain code deployed via an alliance blockchain system; a pass-through certificate circulationunit is added to maintain accounts having the pass-through certificate and achieve pass-through certificate asset management; through signature of the account, the state related to the pass-through certificate is written to a field in an account book related to the system asset chain code to achieve pass-through certificate circulation, thereby expanding the application requirement of the alliance blockchain system.

The invention provides a sparse-coding license plate character recognition method based on shape and contour features. The method comprises a sparse dictionary learning process and a dictionary-utilizing character recognition process. The method mainly comprises the following steps: firstly, a training image set is formed by pre-processing standard license plate images; secondly, feature extraction is performed on the training image set, so that a training feature set is formed; thirdly, a sample region feature and a chain code histogram feature of the raining feature set are introduced into an objective function, sparse dictionary learning is performed on license plate character samples off line to obtain dictionaries corresponding to all characters, and a dictionary set is formed by all the dictionaries; fourthly, feature extraction is performed on test sample data; fifthly, test sample features are subjected to sparse representation in each dictionary, and license plate character recognition is performed through reconstruction errors. Since region features and boundary features of character images are considered at the same time, the sparse-coding license plate character recognition method is a fast and robust license plate character recognition method.

The invention discloses a local shape matching method based on outline random sampling. The local shape matching method based on outline random sampling comprises the steps that all sub-outline sequences of a target outline to be matched and random sub-outlines on a template outline are extracted through a geometric round radius method; the length and width ratios of the minimum rotation bounding rectangles and the outline area features of a target sub-outline and the random sub-outlines of the template are extracted, and primary matching is conducted; mean value distance chain code and mean value angle chain code features, based on angle classification, of the sub-outlines of the outline points obtained after primary matching are extracted; secondary matching is conducted between the chain code features obtained through the random sub-outlines of the template and the sub-outlines obtained after primary matching, so that a small number of optimal matched outlines are obtained; a coordinate conversation matrix of the random sub-outlines of the template and the matched sub-outlines are calculated, and the outline of the whole template is projected to the target outline through the conversation matrix; the coordinate conversation matrix of the sub-outlines is updated; and the optimal matched outline is recognized. By the adoption of the local shape matching method, a matched result can be rapidly and reliably provided, the image registration calculation efficiency is high, and the adaptability is high.

The invention discloses a key derivation method and device applicable to digital currency and belongs to the field of information security. The key derivation method applicable to digital currency comprises the steps of splicing indexes of father public keys and sub-key indexes according to a sequence; using father chain codes as Hash keys, and calculating Hash values of spliced data based on a preset algorithm; obtaining sub-chain codes based on the Hash values; performing ECC (Elliptic Curve Cryptography) addition modular operation on captured residual data; if the operation results are not preset values, regarding the operation results as sub-private keys; and performing ECC point multiplication operation on the sub-private keys to obtain sub-public keys. The key derivation method and device applicable to digital currency have the beneficial effects that backup of key seeds rather than all the keys is required as all the keys can be derived based on the key seeds, the backup volume is small, and loss caused by key damage also can be avoided.

The invention relates to a method for extracting dimensional shape characteristics of profiled fibers; the stepper motor in XYZ direction of an automatic loading table is controlled through a series port to realize the mobile control in horizontal and vertical directions to cause an optical microscope to work in an optimum focusing state. The extracting method comprises the following steps: giving 'cross-sectional samples of the profiled fibers' and 'microscopes for assembling three-dimensional automatic loading table' to judge through 'continuous indirect image acquisition' and 'automatic focusing'; if not, returning to the 'continuous indirect image acquisition'; if yes, going to 'partial image acquisition', then returning to the 'continuous indirect image acquisition' until the partialimage acquisition is ended; going to 'big image splicing'; obtaining 'clear fiber image panoramagram'; carrying out 'image segmentation', 'chain code representation', 'TAR calculation', 'TARN extraction', 'TARP extraction', and 'fiber geometrical shape determination' on the acquired images; and at last, carrying out 'fiber classification and statistics'.

The invention discloses a fast target positioning method and device. The method comprises the following steps: according to an input original image, obtaining a binary image; according to the binary image, carrying out target boundary tracking to obtain a target contour, and obtaining a bounding rectangle of the target contour; and according to target characteristics, carrying out target screeningand positioning. The binary image is obtained by carrying out multi-threshold segmentation, denoising and hole filling of the original image, wherein the denoising and hole filling processing is finished through expansion, corrosion, opening and closing operation of mathematical morphology; the boundary tracking is realized through 4-neighborhood or 8-neighborhood chain code tracking; the targetscreening is realized based on a plurality of constraint conditions, wherein the plurality of constraint conditions comprise an aspect ratio constraint, a maximum and minimum area constraint, a regiongray average value constraint and a heel landing constraint; and the positioning comprises acquisition of azimuth and distance. The fast target positioning method and device are applied to the infrared image field, is high in operation efficiency and accurate in analysis.

The invention provides a method used for automatically cutting X-typed overlapped and conglutinated chromosomes, comprising the steps as follows: step 1: binarization segmentation processing is carried out to a chromosome image so as to obtain a binarization template; step 2: the X-typed overlapped chromosome image is extracted from the template, the chromosome profile is obtained by a gradient operator and treated with Freeman chain coding so as to obtain a boundary chain code; step 3: the overlapped chromosome is processed by thinning algorithm so as to extract a single-pixel framework and determine the central point of an overlapping area; and step 4: the distance from the profile pixel point to the central point of the overlapping area after the Freeman chain code is calculated; four profile concave points which are not adjacent to each other are selected as cutting points so as to divide the profile into two profile sets; and the segmented chromosome profile sets are used for automatically completing the operation of segmenting the chromosome grey images, thus obtaining the automatic segmenting result of the X-typed overlapped and conglutinated chromosome. The method has quick and effective cutting operation and greatly reduces the working quantity and difficulty of manpower segmentation.

The invention discloses a hand gesture recognition method based on a switching Kalman filtering model. The hand gesture recognition method based on a switching Kalman filtering model comprises the steps that a hand gesture video database is established, and the hand gesture video database is pre-processed; image backgrounds of video frames are removed, and two hand regions and a face region are separated out based on a skin color model; morphological operation is conducted on the three areas, mass centers are calculated respectively, and the position vectors of the face and the two hands and the position vector between the two hands are obtained; an optical flow field is calculated, and the optical flow vectors of the mass centers of the two hands are obtained; a coding rule is defined, the two optical flow vectors and the three position vectors of each frame of image are coded, so that a hand gesture characteristic chain code library is obtained; an S-KFM graph model is established, wherein a characteristic chain code sequence serves as an observation signal of the S-KFM graph model, and a hand gesture posture meaning sequence serves as an output signal of the S-KFM graph model; optimal parameters are obtained by conducting learning with the characteristic chain code library as a training sample of the S-KFM; relevant steps are executed again for a hand gesture video to be recognized, so that a corresponding characteristic chain code is obtained, reasoning is conducted with the corresponding characteristic chain code serving as input of the S-KFM, and finally a hand gesture recognition result is obtained.

The invention discloses a method for identifying handwritten Chinese characters based on a combination classifier, which has the advantages that after hand-inputted Chinese characters collected undergo treatments of smoothed filter, noise removal, resampling and data linear normalization, the characters undergo the peeling-off points removal treatment, which removes points of stroke segments which deviate from hand-inputted Chinese characters, which exceed the set threshold value, thereby facilitating the extraction of turning points of strokes and the correct input of stroke segments; setting up basic stroke segment types and corresponding parameter characteristics is to define separating points for separation according to time intervals of sampling points of hand-inputted Chinese characters while sampling; when the directional deviation of a stroke segment is in the range of the set angle threshold, the stroke segment is automatically corrected; a separating connection relation is built, and as for stroke segments which are connected in fact, but separated due to writing habits, the stroke segments are treated as connected stroke segments after being identified, thereby better differentiating a plurality of similar Chinese characters; by calculating Freeman chain codes, hand-inputted Chinese characters can be conveniently identified by using the whole character identification classifier.

The invention discloses a rural resident point information extraction method based on a high-resolution remote-sensing image. The rural resident point information extraction method comprises the following steps: firstly, carrying out Canny edge detection on the high-resolution remote-sensing image, and obtaining a vector edge line through chain code tracking; then, carrying out Douglas-Peucker abbreviation on a vector edge to extract straight-line segments, and rejecting shorter straight-line segments and keeping longer straight-line segments according to length constraints; secondly, according to adjacency relation between the straight-line segments and included angle constraints, extracting straight angle points, calculating the density characteristics of the straight angle points within a certain space region range, and generating a straight angle point density characteristic image, wherein the characteristic image and the input high-resolution remote-sensing image have same spatial range and spatial resolution; and finally, carrying out binarization processing on the density characteristic image by utilizing Otsu, extracting rural resident point vector pattern spots through connected component analysis so as to extract rural resident point information. Precision and effects are improved, and robustness and universality are better.

The application discloses a method used for the financial data sharing, a device used for the financial data sharing and an electronic device. The method comprises the steps of generating the first block data according to the financial asset data; according to the first block data and the audit data, generating the second block data; according to the second block data and the payment data, generating the third block data; issuing the third block data to finish the financial data chain code deployment. The method used for the financial data sharing, the device used for the financial data sharing and the electronic device which are disclosed by the application can guarantee the authenticity of the underlying data of the asset securitization service providers.

The invention relates to an outline-based multi-source image aligning method under a rigid-body transformation, performing noise filter pretreatment on input multi-source images, respectively and then edge detection, linking their respective edges to obtain the closed or open outlines, matching the closed ones by partial variables and the open ones by chain codes, then converting the open outline pairs into the closed outline pairs, and finally finding the centers of mass and minimum moment of inertia axes of all the closed outlines, and according to this, obtaining the rotation and translation quantities between two images to be aligned and implementing the alignment. It can be applied to remote sensing, safety monitoring, airborne multi-source image fusion, image tracking, and other civil or military fields.

The invention relates to a method for detecting people crossing behaviors based on a video monitoring platform. The method includes inputting video frames, marking a wall position with a straight line which is a warning line, editing the video frame according to the marked wall position for each frame of an image, extracting motion foreground images, carrying out binary processing and morphological filtering on foreground images, extracting connected domain by employing a boundary chain code extraction method to obtain a series of rectangular areas which may have human bodies, sorting out the rectangular areas which satisfy the position conditions, tracking images, and recording the top positions of the rectangles tracked for each frame to obtain a motion track. The method does not rely on color information in images, especially suitable of detection during the night. (Enclosure wall crossing events usually occur during the night) The calculating efficiency is high, server configuration can be saved, and the use cost is lowered.

The invention provides a dynamic gesture recognition method and device. The method comprises the following steps of: acquiring image information by an image acquisition device, and segmenting dynamic gesture information from the image information; extracting dynamic gesture vector characteristics in the dynamic gesture information, and performing chain code discretization of the dynamic gesture vector characteristics in twelve directions; calculating probability distribution in the twelve directional angles by utilizing a support vector machine algorithm, and taking the probability distribution as an observation state transition probability matrix of a hidden Markov model having multiple gesture trajectories, so that the hidden Markov model having the multiple gesture trajectories is obtained; calculating a threshold value corresponding to each dynamic gesture characteristic trajectory in the hidden Markov model; calculating the output probabilities of gesture trajectories to be recognized in the hidden Markov model, and selecting the maximum output probability in the output probabilities; and, comparing the maximum output probability with the threshold value, and outputting a recognition result when the maximum output probability is greater than the threshold value. By means of the dynamic gesture recognition method and device provided by the invention, the dynamic gesture recognition rate can be increased.

A method and system are disclosed for automatically generating embroidery designs. A described method includes identifying vertices in a set of chain-code points defining an edge of a first object to be embroidered; filtering the vertices by: determining whether a height of a first triangle defined by a first one of the vertices and ones of the vertices that neighbor the first one of the vertices is at least a threshold; and when the height is less than the threshold, eliminating the first one of the vertices from the vertices; and generating embroidery data based on the filtered vertices.

The invention relates to a method for counting the number of complex overlapping cells in a microscopic image. The method comprises the following steps: pre-processing and further binarizing an original colored microscopic image; locating the concave points in the outline of all the cells by using a chain code difference method, connecting the concave points which are paired with each other, and segmenting the slightly overlapping cells; and finally, counting the number of cells by using a region area statistical method. Compared with the prior art, the invention has the following advantages that: the original colored microscopic image is pre-processed and further binarized according to the color features of the colored microscopic image; the outline of the cells are detected and further segmented by using the chain code difference method because the slightly overlapping cells are characterized in that the concave points of the cells are obvious; and finally, the numbers of the heavily overlapping cells and the single cells are calculated by using the region area statistical method, so the method has small error and high accuracy.

The disclosure relates to a verification method and device and a computer-readable storage medium, and relates to the technical field of information security. The method includes obtaining a block chain code in a file to be verified uploaded by a client and uploading data; obtaining a hash value corresponding to the block chain code from a block chain as a first hash value; performing hash calculation on the uploaded data to obtain a second hash value; and comparing whether the first hash value and the second hash value are consistent to verify whether the file to be verified is tampered. Thetechnical scheme of the disclosure can improve the reliability of information verification.

The invention provides a digital image active camouflage scheme based on fractal, comprising two main phases of adaptive camouflage and original image restoration. In the adaptive camouflage phase, fractal camouflage from an object to a background is realized by utilizing fractal mapping based on color similarity, and an original image is converted into another meaningful image to realize object adaptive camouflage. In the original image restoration phase, an authorized user first losslessly extracts target zone boundary chain codes and fractal parameter codes and approximately recovers an original color images through proper fractal iteration. The invention fully combines fractal self-similarity and image color characteristics, realizes full combination between the object and the background, has good camouflage effects, and can be used for guiding military object camouflage in the military field. The digital image active camouflage scheme has good security, and only an authorized user with a correct secret key can effectively recover an original image; in addition, the scheme is low in computing cost, and can be better applied to network environment visual media anonymous communication.