33results about How to "Simplify the segmentation process" patented technology

The invention discloses a data safety protection method and device based on data partitioning. The method includes the steps that private data are extracted out of original data according to a preset private data extraction rule and partitioned into private data and non-private data; padding data are added to the private data, and encrypted data are obtained; a mapping table is generated according to the serial number of the private data, the padding data and the encrypted data; meanwhile, an index table is generated according to the serial number of the private data, nouns of the mapping table and original file names corresponding to the private data; an information safety card of the private data is generated according to the mapping table and the index table, and the information safety card of the private data is stored in a database according to preset private data storage strategies. According to the data safety protection method and device, the data are partitioned, the private data generate the mapping table and the index table, the information safety card of the private data is established, storage is conducted through different strategies, storage and reading efficiency is improved, and data portioning and encrypting difficulty is greatly simplified.

The invention discloses a method for generating an SCMA (Sparse Code Multiple Access) codebook. The method comprises the steps of: building a factor matrix according to a subcarrier number K and a user number J as well as a predetermined dimension number L of a unit matrix; selecting a QAM (Quadrature Amplitude Modulation) master constellation diagram according to the user number actually transmitted by each subcarrier, optimizing the QAM master constellation diagram by aiming at maximizing the minimum euclidean distance between constellation points, dividing the QAM master constellation diagram by the method of equally dividing the constellation points to obtain sub-constellation diagrams with preset number; and randomly replacing non-zero elements in the factor matrix with the differentsub-constellation diagrams to form a constellation matrix, and generating a codebook according to the constellation matrix and coordinates of the constellation points in the sub-constellation diagrams. The method of the invention can be used for generating the SCMA codebook, and enables the minimum euclidean distance between the constellation points in the constellation diagram corresponding to users to be maximized, thereby reducing error rate of a transmission system using the codebook under the condition of wireless transmission, and achieving high wireless communication application value.

The invention provides a method for dividing a breast three-dimensional image and a device thereof. The method for dividing a breast three-dimensional image comprises a step of inputting the breast three-dimensional image and converting the breast three-dimensional image into a two-dimensional image, a step of obtaining the object boundary line of two-dimensional image by a dynamic programming method, and a step of reconstructing the division result of a breast based on the object boundary line of two-dimensional image, wherein the boundary line is the position of the breast in the two-dimensional image after the outer surface of the breast is converted. According to the scheme, the gray, gradient and shape features of the breast three-dimensional image are combined, and the automatic three-dimensional division is accurately and effectively realized.

The embodiment of the invention discloses an image processing method and device, which are used to rapidly segment a foreground image and a background image in an image. The method in the embodiment of the present application includes: acquiring an original image, and judging whether the original image is a single-channel image; if not, converting the original image into a single-channel image to obtain a grayscale image of the original image; Perform high-frequency filtering on the grayscale value of each pixel in the grayscale image to obtain a first grayscale image; according to the grayscale image and the first grayscale image, the grayscale value of each pixel in the grayscale image value to perform Kalman filtering to obtain the template image of the grayscale image; calculate the distance range between the grayscale value of each pixel in the template image and the grayscale value difference of the corresponding pixel in the first grayscale image If the distance norm is greater than the preset threshold, the current pixel is defined as the foreground image, otherwise, the current pixel is defined as the background image.

In a method and apparatus for recording a magnetic resonance dataset of at least one foreign body in a target region of a patient, a magnetic resonance sequence having an ultra-short echo time, which is less than 500 μs is used for recording the magnetic resonance data.

The invention provides a large joint tissue segmentation method and a segmentation system, which solves the technical problem of low efficiency of joint tissue segmentation in the prior art. The method includes: forming an image segmentation criterion; forming the tissue category and position feature of a single pixel in the MRI image according to the image segmentation criterion to determine the tissue plane profile; combining the image segmentation with the tissue plane profile in each of the MRI images The fiducials form a three-dimensional outline of the tissue. The use of bone features simplifies the tissue segmentation process, the use of related image and information features to form automatic processing of object contours and the improvement of recognition accuracy, and the use of segmentation benchmarks to form image quantification rules, pixel connotation information, and modeling frameworks. Organizations can achieve automatic subject segmentation, accurate contour positioning, and automatic 3D modeling in MRI images, effectively improving the identification efficiency of professional human identification resources.

The invention relates to a contrast medium for ex vivo microangiography for digital imaging of the vascular system of a mouse or rat or other laboratory animals, and of individual animal and human organs, comprising an iodized, esterified oil, a polyurethane, and a hardener. The invention further relates to a method for producing the contrast medium; to a kit of parts, comprising the various containers having the components of the contrast medium according to the invention that are to be mixed; and to a preferred use of the contrast medium according to the invention for imaging by means of a micro-CT device.

The present invention relates to a data encapsulation method and system matching multiple transmission modes. The method includes: step 1, dividing business data into fixed-length fragment files; step 2, dividing the fragment files and auxiliary Data interleaving is added to the broadcast queue; step 3, the fragmented file is encapsulated into multiple UMCP blocks, and it is judged whether to add data verification to the UMCP block according to the link quality; step 4, according to the needs of network adaptation, one or more A UMCP block is encapsulated into a network protocol frame. The present invention simplifies the data segmentation process through fixed-length slice preprocessing, realizes multi-channel concurrency of business data, improves broadcast efficiency, and improves transmission reliability through mixed broadcast and verification functions of business data and auxiliary data , realize the selective reception of data through business requirements, improve business flexibility and reception efficiency, and can adapt to a variety of data link layer network protocols to realize cross-network collaborative services under different network conditions.