63 results about "Quadtree segmentation" patented technology

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.

The invention discloses an image compression method based on adaptive quadtree segmentation and standard deviation optimization, and provides an efficient compression scheme driven by dynamic statistics aiming at the problems of over-segmentation, low calculation efficiency and detail loss under a high compression rate in a traditional quadtree compression algorithm. Specifically, the compression ratio and the reconstruction quality are effectively balanced by calculating the RGB channel standard deviation of an image region in real time and combining region area weighted income analysis to adaptively control the recursive segmentation depth; an area weighted error constraint mechanism is introduced, segmentation of a large-size low-variance region is terminated preferentially, and the redundant data volume is remarkably reduced; a standard deviation-driven priority ranking strategy is adopted, fine processing is performed on high-complexity sub-regions, and rapid approximation is realized by combining mean color filling, so that the algorithm efficiency is optimized while the peak signal-to-noise ratio is ensured. Through the synergistic effect of the technologies, on the premise that high-frequency details of the image are reserved, calculation complexity and storage requirements are greatly reduced, the method is suitable for real-time image transmission, mobile terminal processing and low-bandwidth communication scenes, and a reliable solution is provided for high-precision and low-delay compression requirements.

This disclosure provides a video processing method and apparatus. An example method includes: determining whether a coded block includes samples outside an image boundary; and, in response to the coded block being determined to include samples outside an image boundary, performing quadtree segmentation of the coded block regardless of the value of a first parameter, wherein the first parameter indicates whether the quadtree is permitted for segmenting the coded block.

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.

The invention provides a video processing method and device. An example method includes determining whether a coded block includes samples outside an image boundary; and in response to the encoded block being determined to include a sample outside an image boundary, performing quadtree segmentation of the encoded block regardless of a value of a first parameter indicating whether the encoding block is allowed to be segmented using the quadtree.

Disclosed are a video decoding method and apparatus, and a video encoding method and apparatus. The video decoding method according to the present disclosure acquires division information relating to a division structure of a coding tree unit from a bitstream, divides the coding tree unit into at least one coding unit based on the division information, and performs decoding based on the at least one coding unit. The segmentation structure of the coding tree unit comprises a second coding unit obtained by segmenting a first coding unit in coding units segmented from the coding tree unit according to levels, the first coding unit is a coding unit obtained by performing quadtree segmentation on a coding unit of an upper layer depth or one of coding units obtained by performing multi-type segmentation on the coding unit of the upper layer depth, and if the first coding unit is one of the coding units obtained by performing multi-type segmentation on the coding unit of the upper layer depth; the second coding unit can comprise a coding unit obtained by performing quadtree segmentation on the first coding unit.

An image encoder performs a first partitioning including using a first partition mode, without writing first splitting information indicative of the first partition mode into a bitstream, to split a first block into a plurality of second blocks in response to that the first block is located adjacent to an edge of a picture and that the dimensions of the first block satisfy a first condition; and performs a second partitioning on the second block by writing second splitting information indicative of a second partition mode into the bitstream, and using the second partition mode to split the second block into a plurality of coding units (CUs), wherein the second partition mode prohibits the quad tree splitting of the second block in certain conditions.

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.

An image encoder performs a first partitioning including using a first partition mode, without writing first splitting information indicative of the first partition mode into a bitstream, to split a first block into a plurality of second blocks in response to that the first block is located adjacent to an edge of a picture and that the dimensions of the first block satisfy a first condition; and performs a second partitioning on the second block by writing second splitting information indicative of a second partition mode into the bitstream, and using the second partition mode to split the second block into a plurality of coding units (CUs), wherein the second partition mode prohibits the quad tree splitting of the second block in certain conditions.

The present disclosure relates generally to video coding and picture partitioning methods. In particular, the disclosure is concerned with relations between partition constraint elements, by setting partitioning rules for different picture partitioning methods. The disclosure provides devices and corresponding methods for generating or processing a bitstream including encoded pictures, particularly for setting and including partition constraint element into the bitstream. One of the devices is configured to determine a minimum luma size of a leaf block resulting from quadtree splitting (MinQtSizeY), determine a maximum luma size of a coding block where partitioning using a binary tree splitting is allowed (MaxBtSizeY) based on the MinQtSizeY, and include information for the determined MinQtSizeY into the bitstream.

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.

The invention provides a video processing method and device. An example method includes determining whether a coded block includes samples outside an image boundary; and in response to the encoded block being determined to include a sample outside an image boundary, performing quadtree segmentation of the encoded block regardless of a value of a first parameter indicating whether the encoding block is allowed to be segmented using the quadtree.

A video processing method includes determining features about a current video block; determining an operational state with respect to an asymmetric quadtree (UQT) partition based on the determination of the feature, wherein the operational state indicates whether the UQT partition is enabled or disabled and / or how to partition the current video block into four partitions using the UQT partition; and converting between the current video block and the bitstream representation of the current video block based on the operating state of the UQT partition.

The invention provides a video processing method and device. An example method includes determining whether a coded block includes samples outside an image boundary; and in response to the encoded block being determined to include a sample outside an image boundary, performing quadtree segmentation of the encoded block regardless of a value of a first parameter indicating whether the encoding block is allowed to be segmented using the quadtree.

The invention belongs to the technical field of library management systems, and particularly relates to a large-model-driven intelligent library management system comprising a semantic analysis module used for inputting book resource data into a large language model for analysis and extracting key semantic knowledge; the clustering module is used for performing clustering division on the semantic vector by using a quadtree segmentation algorithm according to the semantic vector converted by the large language model; the RDF data generation module is used for generating triple RDF data, and creating URI (Uniform Resource Identifier) association links among books through a similarity matching method; the RDF editor module is used for providing a user interaction interface. Mapping the descriptive labels of the vector clusters segmented by the quadtree with the triple RDF data attributes; generating a URI (Uniform Resource Identifier) association link based on a BIBFRAME system according to vector cluster similarity matching of different books; and the knowledge relevance of the whole library collection books is improved.

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.

There is provided a method for reducing encoding complexity. The method comprises providing a video. The method comprises encoding the video, wherein encoding the video comprises splitting a coding tree unit into one or more coding units; wherein when splitting the coding tree unit into one or more coding units and when quad tree splitting is allowed for 5 the coding units: (i) if horizontal binary splitting, BTH, is applied to a first coding unit creating a first subblock and a second subblock, followed by vertical binary splitting, BTV, on the first subblock, disabling a BTV split type for the second subblock; and (ii) if vertical binary splitting, BTV, is applied to a first coding unit creating a first subblock and a second subblock, followed by horizontal binary splitting, BTH, on the first subblock, disabling a 0 BTH split type for the second subblock.

A video processing method and apparatus are provided. An example method includes determining whether a coding block includes samples outside of a picture boundary, and responsive to the coding block being determined to include samples outside of a picture boundary, performing quad tree partitioning of the coding block regardless of a value of a first parameter, wherein the first parameter indicates whether use of the quad tree to partition the coding block is allowed.

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.

A video processing method and apparatus are provided. An example method includes determining whether a coding block includes samples outside of a picture boundary, and responsive to the coding block being determined to include samples outside of a picture boundary, performing quad tree partitioning of the coding block regardless of a value of a first parameter, wherein the first parameter indicates whether use of the quad tree to partition the coding block is allowed.

The invention provides a medical care health sensor data security protection method and system, a medium and a server, and relates to the technical field of data security, and the method comprises the steps: firstly collecting historical data of a medical care health sensor and obtaining user information, then extracting user information features and coding, then constructing a first matrix by using a coding value of any feature, and finally constructing a second matrix by using a coding value of any feature; forming a second matrix by using a block splicing algorithm; segmenting the second matrix by adopting a quadtree segmentation algorithm, judging the data attribution of segmentation blocks, if the segmentation blocks belong to the same first matrix, taking the segmentation blocks as quadtree leaf nodes, otherwise, updating the segmentation blocks as the second matrix and continuing to segment; and finally, performing path coding on the leaf nodes, performing scrambling processing by taking a coding result as a label, and obtaining and storing a final processing result. According to the method, the data can be efficiently and safely processed.

To provide a video encoding / decoding method and device enabling a quantization parameter differential value to be allocated to various levels when a block is segmented into a quad tree structure.SOLUTION: There is provided a method and device that records a quantization parameter differential value based on a quadtree segmentation in a largest coding unit (LCU), and adaptively predicting a quantization parameter value based on context information of a neighboring coding unit (CU). The method and device are configured to: effectively present block information having the quantization parameter differential value based on segmentation information of the CU; and, when predicting the quantization parameter value, perform an adaptive prediction utilizing the context information on the neighboring CU such as block size, block segmentation, quantization parameter value, etc.SELECTED DRAWING: Figure 1b

Disclosed are methods and apparatuses for decoding an image. A method includes receiving a bitstream obtained by encoding the image; dividing a first coding block into a plurality of second coding blocks; generating a prediction block of a second coding block based on syntax information obtained from the bitstream; and reconstructing the second coding block based on the prediction block and a residual block of the second coding block, the residual block being obtained by performing a dequantization and an inverse-transform on quantized transform coefficients from the bitstream. The first coding block has a recursive division structure. The first coding block is divided based on at least one of a quad tree division, a binary tree division or a triple tree division.