WO2022257970A1 - 点云的几何信息编码处理方法、解码处理方法及相关设备 - Google Patents
点云的几何信息编码处理方法、解码处理方法及相关设备 Download PDFInfo
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
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- G06T9/00—Image coding
- G06T9/004—Predictors, e.g. intraframe, interframe coding
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- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/157—Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
- H04N19/159—Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
Definitions
- the present application belongs to the technical field of point cloud processing, and in particular relates to a point cloud geometric information encoding processing method, decoding processing method and related equipment.
- the traditional exploration model proposes an inter-frame coding framework based on the intra-frame coding framework.
- the intra-frame and inter-frame coding use the same set of contexts. If the corresponding node between frames is not occupied, the intra-frame context is used. If the inter-frame corresponding node is occupied, intra-frame prediction is used, and this node is the context with the highest probability of being occupied. When the inter-frame corresponding nodes are noise points, the accuracy of inter-frame prediction will be poor.
- the embodiment of the present application provides a point cloud geometric information encoding processing method, decoding processing method and related equipment, which can solve the problem of poor inter-frame prediction accuracy during the inter-frame prediction process of the existing inter-frame coding framework.
- a method for encoding geometric information of point clouds including:
- the first node is a node corresponding to the second node in the tree structure corresponding to the second geometric information
- the second node is A child node to be encoded in the current node to be encoded in the tree structure corresponding to the first geometric information
- Entropy encoding is performed on the placeholder code of the second node by using the target context.
- a method for decoding and processing geometric information of point clouds including:
- the second geometric information is the reconstruction geometric information of the reference frame point cloud corresponding to the Nth frame point cloud currently to be decoded;
- the first node corresponds to the second node in the tree structure corresponding to the second geometric information node
- the second node is a child node to be decoded in the current node to be decoded in the tree structure corresponding to the first geometric information
- the first geometric information is the geometric information corresponding to the decoded node of the Nth frame point cloud
- a device for encoding and processing point cloud geometric information including:
- a first division module configured to perform synchronous tree division on the first geometric information and the second geometric information, and obtain a first placeholder code corresponding to the first geometric information and a second placeholder code corresponding to the second geometric information ;
- the first geometric information is obtained by preprocessing the geometric information of the Nth frame point cloud to be encoded currently, N is an integer greater than 1, and the second geometric information is the reference frame corresponding to the Nth frame point cloud The reconstructed geometric information of the point cloud;
- the first determination module is configured to determine the target context according to the occupancy of the first node and the neighbor nodes of the first node; the first node is a node corresponding to the second node in the tree structure corresponding to the second geometric information , the second node is a child node to be encoded in the current node to be encoded in the tree structure corresponding to the first geometric information;
- An encoding module configured to perform entropy encoding on the placeholder code of the second node by using the target context.
- a device for decoding and processing point cloud geometric information including:
- the second division module is used to divide the second geometric information into a tree structure to obtain a second placeholder code, and the second geometric information is the reconstructed geometric information of the reference frame point cloud corresponding to the Nth frame point cloud currently to be decoded ;
- the second determination module is configured to determine the occupancy of the first node and the neighbor nodes of the first node based on the second occupancy code, and determine the target context;
- the first node is a tree structure corresponding to the second geometric information
- the second node is a child node to be decoded in the current node to be decoded in the tree structure corresponding to the first geometric information
- the first geometric information is that the Nth frame point cloud has been decoded
- a decoding module configured to use the target context to perform entropy decoding on the geometric code stream corresponding to the second node to obtain a placeholder code corresponding to the second node;
- a reconstruction module configured to perform multi-tree reconstruction based on the placeholder code corresponding to the second node, and obtain geometric information of the second node.
- a terminal includes a processor, a memory, and a program or instruction stored in the memory and operable on the processor.
- the program or instruction is executed by the processor The steps of the method described in the first aspect are realized.
- a terminal including a processor and a communication interface, wherein,
- the processor is configured to:
- the first node is a node corresponding to the second node in the tree structure corresponding to the second geometric information
- the second node is A child node to be encoded in the current node to be encoded in the tree structure corresponding to the first geometric information
- the processor is operable to:
- Carry out tree structure division to the second geometric information, obtain the second placeholder code, described second geometric information is the reconstructed geometric information of the reference frame point cloud corresponding to the Nth frame point cloud to be decoded currently;
- the first node corresponds to the second node in the tree structure corresponding to the second geometric information node
- the second node is a child node to be decoded in the current node to be decoded in the tree structure corresponding to the first geometric information
- the first geometric information is the geometric information corresponding to the decoded node of the Nth frame point cloud
- a readable storage medium is provided, and programs or instructions are stored on the readable storage medium, and when the programs or instructions are executed by a processor, the steps of the method described in the first aspect are realized, or the steps of the method described in the first aspect are realized, or The steps of the method described in the second aspect.
- the embodiment of the present application provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions, so as to implement the first aspect The steps of the method, or the steps of the method for realizing the second aspect.
- a ninth aspect provides a computer program/program product, the computer program/program product is stored in a non-transitory storage medium, and the computer program/program product is executed by at least one processor to implement the first aspect The steps of the method, or the steps of implementing the method as described in the second aspect.
- a communication device configured to perform the steps of the method described in the first aspect, or to perform the steps of the method described in the second aspect.
- the first placeholder code corresponding to the first geometry information and the second placeholder code corresponding to the second geometry information are obtained by performing synchronous tree division on the first geometry information and the second geometry information;
- the first geometric information is obtained by preprocessing based on the geometric information of the point cloud of the Nth frame to be encoded, N is an integer greater than 1, and the second geometric information is the point cloud of the reference frame corresponding to the point cloud of the Nth frame.
- the reconstructed geometric information according to the occupancy of the first node and the neighbor nodes of the first node, determine the target context;
- the first node is the node corresponding to the second node in the tree structure corresponding to the second geometric information, so
- the second node is a sub-node to be encoded in the current node to be encoded in the tree structure corresponding to the first geometric information;
- the target context is used to perform entropy encoding on the placeholder code of the second node.
- the embodiment of the present application can improve Inter prediction accuracy.
- Figure 1 is a schematic diagram of the point cloud AVS encoder framework
- Figure 2 is a schematic diagram of the point cloud AVS decoder framework
- FIG. 3 is a schematic diagram of an interframe coding framework
- Fig. 4 is a flow chart of a method for encoding and processing geometric information of a point cloud provided by an embodiment of the present application
- Fig. 5 is a schematic diagram of the processing flow of octree encoding
- FIG. 6 is a schematic flow chart of entropy encoding using the first set of contexts
- Fig. 7 is a flow chart of a geometric information decoding processing method of a point cloud provided by an embodiment of the present application.
- FIG. 8 is a structural diagram of a point cloud geometric information encoding processing device provided by an embodiment of the present application.
- FIG. 9 is a structural diagram of a point cloud geometric information decoding processing device provided by an embodiment of the present application.
- FIG. 10 is a structural diagram of a communication device provided by an embodiment of the present application.
- FIG. 11 is a structural diagram of a terminal provided by an embodiment of the present application.
- first, second and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein and that "first" and “second” distinguish objects. It is usually one category, and the number of objects is not limited. For example, there may be one or more first objects.
- “and/or” in the specification and claims means at least one of the connected objects, and the character “/” generally means that the related objects before and after are an "or” relationship.
- the codec terminal corresponding to the codec method in the embodiment of the present application can be a terminal, and the terminal can also be called a terminal device or a user terminal (User Equipment, UE), and the terminal can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop Laptop Computer or Notebook Computer, Personal Digital Assistant (PDA), PDA, Netbook, Ultra-Mobile Personal Computer (UMPC), Mobile Internet Device (Mobile Internet Device) , MID), augmented reality (Augmented Reality, AR) / virtual reality (Virtual Reality, VR) equipment, robot, wearable device (Wearable Device) or vehicle equipment (Vehicle User Equipment, VUE), pedestrian terminal (Pedestrian User Equipment , PUE) and other terminal-side devices, wearable devices include: smart watches, bracelets, earphones, glasses, etc. It should be noted that, the embodiment of the present application does not limit the specific type of the terminal.
- the geometric information and attribute information of the point cloud are encoded separately.
- coordinate transformation is performed on the geometric information so that all point clouds are contained in a bounding box, and then the coordinates are quantized.
- Quantization mainly plays the role of scaling. Since quantization will round the geometric coordinates, the geometric information of some points will be the same, which is called duplicate points. It is determined whether to remove duplicate points according to the parameters. Quantization and removal of duplicate points are two steps. Also known as the voxelization process.
- the bounding box is divided into 8 sub-cubes, and the non-empty sub-cubes continue to be divided until the unit cube with leaf nodes of 1x1x1 is obtained.
- the number of points in the point is encoded to generate a binary code stream.
- the current AVS geometry division sequence includes two types:
- Depth-first traversal order When dividing the geometry into an octree, the first node of the current layer will be divided continuously until the leaf node obtained by division is a 1x1x1 unit cube and stop dividing the current node. According to this sequence, the subsequent nodes of the current layer are divided until the division of the nodes on the current layer is completed.
- Attribute coding is mainly aimed at color and reflectance information. First, judge whether to perform color space conversion according to the parameters. If color space conversion is performed, the color information is converted from Red Green Blue (RGB) color space to brightness color (YUV) color space. Then, the geometrically reconstructed point cloud is recolored with the original point cloud so that the unencoded attribute information corresponds to the reconstructed geometric information.
- RGB Red Green Blue
- YUV brightness color
- the nearest neighbor of the point to be predicted is searched using the geometric spatial relationship, and the reconstructed attribute value of the found neighbor is used to predict the point to be predicted to obtain the predicted attribute value, and then the The real attribute value and the predicted attribute value are differentiated to obtain the prediction residual, and finally the prediction residual is quantized and encoded to generate a binary code stream.
- the AVS decoding process corresponds to the encoding process.
- the AVS decoder framework is shown in FIG. 2 .
- the EM model of AVS proposes an inter-frame coding framework based on the above-mentioned intra-frame coding framework, as shown in FIG. 3 .
- the specific coding process is as follows:
- I frame and P frame Two frame types are set: I frame and P frame.
- the first frame of each sequence is an I frame, and only intra-frame prediction is used. All subsequent frames are P frames, and forward inter-frame prediction is performed, and the previous frame is used as a reference frame.
- an interframe flag (interMode) is added to control whether to use the interframe prediction tool;
- the same sub-block division operation as that of the current block to be encoded is performed to obtain the occupancy code information of the predicted block and the current block respectively.
- the decoding process corresponds to the encoding process, which will not be repeated here.
- FIG. 4 is a flow chart of a point cloud geometric information encoding processing method provided by an embodiment of the present application. As shown in FIG. 4, it includes the following steps:
- Step 401 divide the first geometry information and the second geometry information into a synchronous tree, and obtain a first placeholder code corresponding to the first geometry information and a second placeholder code corresponding to the second geometry information;
- the first geometric information is obtained by preprocessing the geometric information of the point cloud of the Nth frame to be encoded currently, N is an integer greater than 1, and the second geometric information is the reconstruction of the point cloud of the reference frame corresponding to the point cloud of the Nth frame geometric information;
- the synchronous tree division of the first geometric information and the second geometric information can be understood as, when the tree structure division is performed on the second geometric information, the tree structure of the first geometric information is referred to for synchronous division, that is, the first geometric information is divided synchronously. Whether a certain node in the tree structure corresponding to the second geometric information is divided into child nodes needs to be synchronized with the corresponding node in the tree structure corresponding to the first geometric information.
- tree structure division may be understood as multi-tree structure division, for example, octree division, quadtree division, and binary tree division may be used.
- the above-mentioned reference frame point cloud is at least one frame of point cloud that has been encoded.
- the geometric information can be reconstructed to obtain the reconstructed geometric information and open up memory to save each frame.
- the reconstructed geometric information corresponding to a frame of encoded point cloud.
- the geometric information of the point cloud of the Nth frame can be preprocessed to obtain the first geometric information.
- the foregoing preprocessing refers to coordinate translation and quantization processing performed before the synchronization tree division.
- coordinate translation, quantization processing, and deduplication processing may be performed on the geometric information of the point cloud of the Nth frame to obtain the first geometric information corresponding to the point cloud of the Nth frame.
- Step 402 Determine the target context according to the occupancy of the first node and the neighbor nodes of the first node; the first node is a node corresponding to the second node in the tree structure corresponding to the second geometric information, and the second node The second node is a child node to be encoded in the current node to be encoded in the tree structure corresponding to the first geometric information;
- the occupancy status of the first node may include whether the first node is occupied, and the number of points of the second geometric information included in the space block corresponding to the first node.
- the spatial block corresponding to the first node contains at least one point of the second geometric information, it means that the first node is occupied; when the spatial block corresponding to the first node does not contain the point of the second geometric information, it means that the first Node is not occupied. Since the target context of the current node to be encoded is determined by the occupancy of the first node and the occupancy of the neighbors of the first node, compared to the prior art, the context is determined only by the occupancy of one node, which can improve the performance of inter-frame prediction. probability.
- Step 403 using the target context to perform entropy encoding on the placeholder code of the second node.
- the occupancy code of the current node to be encoded can be obtained, and then the target context corresponding to each child node is determined, so that the occupancy code of each child node of each node can be determined.
- the bitcode is entropy encoded.
- the first placeholder code corresponding to the first geometry information and the second placeholder code corresponding to the second geometry information are obtained by performing synchronous tree division on the first geometry information and the second geometry information;
- the first geometric information is obtained by preprocessing based on the geometric information of the point cloud of the Nth frame to be encoded, N is an integer greater than 1, and the second geometric information is the point cloud of the reference frame corresponding to the point cloud of the Nth frame.
- the reconstructed geometric information according to the occupancy of the first node and the neighbor nodes of the first node, determine the target context;
- the first node is the node corresponding to the second node in the tree structure corresponding to the second geometric information, so
- the second node is a sub-node to be encoded in the current node to be encoded in the tree structure corresponding to the first geometric information;
- the target context is used to perform entropy encoding on the placeholder code of the second node.
- the embodiment of the present application can improve Inter prediction accuracy.
- the step of determining the target context according to the occupancy of the first node and the neighbor nodes of the first node includes:
- the target context is determined based on the weighted sum.
- the corresponding value can be set to 1, and the unoccupied value can be set to 0, based on the weight corresponding to the product of the value corresponding to each node. Obtain the above weighted sum.
- the above target context may include a first set of contexts for inter-frame coding or a second set of contexts for intra-frame coding.
- the first set of contexts can be designed through the occupancy patterns of neighboring nodes of corresponding nodes between frames, and the second set of contexts can use intra-frame contexts.
- the foregoing weighted sum may be compared with a certain threshold to determine whether to use the first set of contexts or the second set of contexts. For example, when the weighted sum is greater than the threshold, the first set of contexts may be used for entropy encoding, and when the weighted sum is less than or equal to the threshold, the second set of contexts may be used for entropy encoding.
- the target context includes a first set of contexts for inter-frame coding
- using the target context to perform entropy coding on the placeholder code of the second node include:
- Entropy encoding is performed on the placeholder code of the second node by using the context corresponding to the index value in the first set of context.
- the above weighted sum may be used to determine a part of the bit sequence of the index value, for example, divide the weighted sum by 2 to obtain the index (CtxIdx). Whether the occupancy of the third node and the occupancy of the fourth node are the same determine another part of the bit sequence of the index value, for example, determine the corresponding identification value sameFlag based on whether they are the same, sameFlag equal to 1 means the same, sameFlag equal to 0 means different. Index to the corresponding context based on CtxIdx and sameFlag, and perform entropy encoding. Since the context of the current node to be encoded is determined by whether the previous node and the node corresponding to the geometric information are the same, the accuracy of inter-frame prediction is fully considered.
- sameFlag can be set as a default value. After the entropy coding of the child node of the current node to be coded is completed, it may be determined whether the occupancy of the child node is the same as that of the node corresponding to the second geometric information, so as to perform entropy coding on the next child node.
- the M neighbor nodes include at least one of the following: co-planar neighbor nodes, collinear neighbor nodes, and co-point neighbor nodes.
- the types of the M neighbor nodes can be set according to actual needs.
- the M neighbor nodes include co-planar neighbor nodes, collinear neighbor nodes and co-point neighbor nodes as examples for illustration.
- the corresponding weight can also be set according to the first node and the degree of correlation between the first node and the second node, for example, the weight value of the first node is greater than or equal to the weight value of the coplanar neighbor node, the The weight value of the coplanar neighbor nodes is greater than or equal to the weight value of the collinear neighbor nodes, and the weight value of the collinear neighbor nodes is greater than or equal to the weight value of the collinear neighbor nodes.
- the weight value of the first node is Wcur
- the weight value of the coplanar neighbor nodes of the first node is Wf
- the weight value of the collinear neighbor nodes of the first node is Wl
- the weight value of the co-point neighbor nodes of the first node is is Wp
- the occupied quantity of the first node is OCcur
- the occupied quantity of the coplanar neighbor nodes of the first node is OCf
- the occupied quantity of the collinear neighbor nodes of the first node is OCl
- the co-located neighbors of the first node The number of nodes occupied is OCp.
- the root node when encoding the first geometric information, may be first determined and stored in the first node queue. It should be understood that the root node corresponds to a bounding box, including all points in the first geometric information. Then divide the root node into a tree structure to obtain child nodes, and store the occupied child nodes in the first node queue based on the occupation of the child nodes. At this time, the occupied child node can be added to the first node queue, and the specific position of adding to the first node queue can be after the last node of the first node queue, or after the node currently undergoing structure tree division . When encoding, the nodes in the first node queue may be traversed sequentially as the current nodes to be encoded, and the encoding operation is performed.
- performing tree structure division on the first geometric information to obtain a first placeholder code corresponding to the first geometric information includes:
- the first node queue includes nodes that are occupied by corresponding space blocks in the tree structure constructed based on the first geometric information
- the first placeholder code includes the placeholder code of the current node to be coded.
- the current node to be coded can be understood as a root node, a child node or a leaf node. It should be understood that when dividing the structure tree of the current node to be encoded, it is necessary to perform synchronous tree division on the nodes corresponding to the current node to be encoded in the structure tree corresponding to the second geometric information. Specifically, it may first be judged whether the current node to be coded satisfies the outlier coding conditions, and if the outlier conditions are met, the outlier coding mode is entered, and if the outlier coding conditions are not met, the outlier coding mode is entered. After entering the placeholder code encoding mode, the current node to be encoded can be divided into a tree structure first to obtain the child nodes of the current node to be encoded, so as to further determine the placeholder code of the current node to be encoded.
- the method further includes:
- the current node to be encoded When the current node to be encoded satisfies the isolated point encoding condition, and the current node to be encoded is a non-isolated node, perform tree structure division on the current node to be encoded, and obtain the child nodes of the current node to be encoded .
- the current node to be encoded is an isolated node.
- the condition of whether it is an isolated node can be set according to actual needs. For example, in some embodiments, when the point cloud of the Nth frame includes less than a preset number of points located in the space block corresponding to the current node to be encoded, It can be considered that the current node to be coded is an isolated node.
- the geometric information of the multiple points may be partially or completely the same, or all may be different. When the geometric information is the same, the corresponding attribute information is different.
- perform tree structure division on the current node to be encoded first, and then determine whether the isolated point is satisfied.
- perform tree structure division on the first geometric information to obtain the The first placeholder code corresponding to the first geometric information includes:
- the first node queue includes nodes that are occupied by corresponding space blocks in the tree structure constructed based on the first geometric information
- the placeholder code of the current node to be coded based on the occupancy of the child nodes of the current coded node
- the first placeholder code includes the placeholder code of the current node to be coded.
- the tree structure since the tree structure is divided first, it can be determined whether the current node to be encoded satisfies the isolated point according to the occupancy of the child nodes of the node corresponding to the current node to be encoded in the tree structure corresponding to the second geometric information. encoding conditions.
- the method further includes:
- the current node to be encoded When the current node to be encoded satisfies the isolated point encoding condition, and the current node to be encoded is a non-isolated node, determine the occupancy of the current node to be encoded based on the occupancy of the child nodes of the current to be encoded node bitcode.
- the current node to be encoded after entering the isolated point encoding mode, it is first determined whether the current node to be encoded is not an isolated node. It should be understood that the condition of whether it is an isolated node can be set according to actual needs. For example, in some embodiments, when the point cloud of the Nth frame includes less than a preset number of points located in the space block corresponding to the current node to be encoded, It can be considered that the current node to be encoded is an isolated node. Wherein, when multiple points are located in the space block corresponding to the isolated node, the geometric information of the multiple points may be partially or completely the same, or all may be different. When the geometric information is the same, the corresponding attribute information is different.
- the isolated point encoding condition can also be used to determine whether to , to determine the target context. That is, after the tree structure is divided, the placeholder code can be determined, and then the outlier encoding condition is judged. If the outlier encoding condition is met, enter the outlier encoding mode; Placeholder encoding mode. After entering the occupancy code coding mode, the target context can be determined according to the occupancy of the first node and the neighbor nodes of the first node.
- performing tree structure division on the second geometric information to obtain a second placeholder code corresponding to the second geometric information includes:
- the second occupancy code includes the occupancy code of the fifth node Occupancy code
- the occupancy code of the fifth node since the occupancy code of the fifth node is stored, the occupancy of the fifth node's neighbor nodes on the same layer can be obtained, and the occupancy status of the same-layer node corresponding to the parent node of the fifth node can also be obtained. Occupancy of child nodes. Therefore, the accuracy of judging the coding condition of the isolated point can be further improved.
- the outlier encoding conditions include:
- the directly encoded identifier of the geometric header information corresponding to the Nth frame point cloud is a preset value
- the spatial block corresponding to the current node to be encoded has side lengths in L directions greater than the preset minimum side length
- the sum of the Morton code bits to be encoded at the target point is greater than the preset times of L
- the target The points include points in the first geometric information located in the spatial block corresponding to the current node to be encoded, and L is a natural number
- the target node is a node associated with the current node to be encoded among the encoded nodes.
- the above-mentioned preset times may be 2 times.
- the condition that the target node is occupied satisfies the preset condition as part of the outlier encoding condition, so that it can be determined whether the current node satisfies the outlier condition according to the sparseness of the nodes in the second geometric information.
- Encoding conditions For example, if the nodes corresponding to the reconstructed point cloud of the reference frame are relatively sparse, then the nodes of the current frame are also highly likely to be sparse, so the probability of this node being an isolated point is relatively high.
- the node of the current frame node entering the isolated point encoding mode is a real isolated point with a high probability, and enters the isolated point encoding by upgrading
- the target node includes at least one of the following:
- a child node of a fifth node where the fifth node is a node corresponding to the current node to be encoded in the tree structure corresponding to the second geometric information;
- a child node of the neighbor node of the fifth node A child node of the neighbor node of the fifth node.
- the neighbor nodes of the fifth node include at least one of the following:
- the fact that the target node is occupied and the preset condition is satisfied includes at least one of the following:
- the number of nodes occupied by the target node is less than a second threshold
- the number of points located in the spatial block corresponding to the target node in the second geometric information is less than a third threshold.
- octree coding will be taken as an example for description below. First open up a part of the memory to save the reconstructed point cloud obtained by the encoded frame as the reference frame of the current frame point cloud and record the reconstructed point cloud as pointcloudPred. As shown in Figure 5, the processing flow of octree encoding is as follows:
- the sub-node corresponding to the reference frame can be understood as a node corresponding to the sub-node currently performing entropy encoding among the nodes corresponding to the point cloud reconstruction of the reference frame.
- the first set of contexts can be designed based on the occupancy patterns of neighboring nodes of corresponding nodes between frames, and the second set of contexts can use intra-frame contexts.
- the context index number is obtained by mapping the placeholder code weight OccupancyWeight, which is set to CtxIdx.
- One of the methods is to divide the OccupancyWeight by 2 to obtain the index;
- the context of the current sub-node to be encoded is determined according to whether the occupancy of the previous sub-node and the corresponding sub-node of the reference frame are the same, fully considering the accuracy of inter-frame prediction, and more effective prediction can be performed.
- FIG. 7 is a flow chart of a point cloud geometric information decoding processing method provided by an embodiment of the present application. As shown in FIG. 7, it includes the following steps:
- Step 701 divide the second geometric information into a tree structure to obtain a second placeholder code, and the second geometric information is the reconstructed geometric information of the reference frame point cloud corresponding to the point cloud of the Nth frame to be decoded;
- Step 702 determine the occupancy of the first node and the neighbor nodes of the first node based on the second occupancy code, and determine the target context;
- the first node is the second node in the tree structure corresponding to the second geometric information.
- the node corresponding to the node, the second node is a child node to be decoded in the current node to be decoded in the tree structure corresponding to the first geometric information, and the first geometric information is the geometry corresponding to the decoded node of the Nth frame point cloud information;
- Step 703 using the target context to perform entropy decoding on the geometric code stream corresponding to the second node to obtain a placeholder code corresponding to the second node;
- Step 704 Perform multi-tree reconstruction based on the placeholder code corresponding to the second node to obtain geometric information of the second node.
- the first geometric information may be obtained through entropy decoding and multi-tree reconstruction based on the geometric code stream corresponding to the point cloud of the Nth frame.
- the step of determining the occupancy of the first node and the neighbor nodes of the first node based on the second occupancy code, and determining the target context includes:
- the target context is determined based on the weighted sum.
- the target context when the target context includes a first set of contexts for inter-frame decoding, use the target context to perform entropy decoding on the geometric code stream corresponding to the second node to obtain the second node
- the corresponding placeholder code steps include:
- Entropy decoding is performed on the placeholder code of the second node by using the context corresponding to the index value in the first set of context to obtain the placeholder code corresponding to the second node.
- the M neighbor nodes include at least one of the following: co-planar neighbor nodes, collinear neighbor nodes, and co-point neighbor nodes.
- the weight value of the first node is greater than or equal to the weight value of the coplanar neighbor node
- the weight value of the coplanar neighbor node is greater than or equal to the weight value of the collinear neighbor node, so The weight value of the collinear neighbor nodes is greater than or equal to the weight value of the collinear neighbor nodes.
- the target context includes a first set of contexts for inter-frame decoding or a second set of contexts for intra-frame decoding.
- dividing the first geometric information into a tree structure to obtain a first placeholder code corresponding to the first geometric information includes:
- the first node queue includes nodes that are occupied by corresponding space blocks in the tree structure constructed based on the first geometric information
- the second dummy code includes the dummy code of the first node.
- the method further includes:
- dividing the first geometric information into a tree structure to obtain a first placeholder code corresponding to the first geometric information includes:
- the first node queue includes nodes occupied by corresponding space blocks in the tree structure constructed based on the first geometric information
- the second dummy code includes the dummy code of the first node.
- the method further includes:
- the current node to be decoded satisfies the isolated point decoding condition and the current node to be decoded is a non-isolated node, determine the occupancy code of the first node based on the occupancy of the child nodes of the first node .
- the method also includes:
- a placeholder code of the first node is stored.
- the outlier decoding conditions include:
- the direct decoding identifier of the geometric header information corresponding to the Nth frame point cloud is a preset value
- the spatial block corresponding to the current node to be decoded has side lengths in L directions greater than the preset minimum side length
- the sum of the Morton code bits to be decoded at the target point is greater than the preset times of L
- the target The points include points in the first geometric information located in the spatial block corresponding to the current node to be decoded, and L is a natural number
- the target node is a node associated with the current node to be decoded among the decoded nodes.
- the target node includes at least one of the following:
- a child node of a fifth node where the fifth node is a node corresponding to the current node to be decoded in the tree structure corresponding to the second geometric information;
- a child node of the neighbor node of the fifth node A child node of the neighbor node of the fifth node.
- the neighbor nodes of the fifth node include at least one of the following:
- the fact that the target node is occupied and the preset condition is satisfied includes at least one of the following:
- the number of nodes occupied by the target node is less than a second threshold
- the number of points located in the spatial block corresponding to the target node in the second geometric information is less than a third threshold.
- this embodiment is an implementation of the decoding end corresponding to the embodiment shown in FIG. 4 , and the decoding process is the inverse process of the encoding process.
- the decoding process is the inverse process of the encoding process.
- specific implementation methods please refer to the relevant description of the embodiment shown in FIG. 4 , and To achieve the same beneficial effect, in order to avoid repeated descriptions, details are not repeated here.
- the execution subject may be the point cloud geometric information encoding processing device, or the point cloud geometric information encoding processing device for executing point The control module of the geometric information encoding processing method of the cloud.
- the point cloud geometric information encoding processing device provided in the embodiment of the present application is described by taking the point cloud geometric information encoding processing device executing the point cloud geometric information encoding processing method as an example.
- FIG. 8 is a structural diagram of a point cloud geometric information encoding processing device provided in an embodiment of the present application.
- the point cloud geometric information encoding processing device 800 includes:
- the first division module 801 is configured to divide the first geometry information and the second geometry information into a synchronous tree, and obtain a first placeholder code corresponding to the first geometry information and a second placeholder corresponding to the second geometry information Code; the first geometric information is obtained by preprocessing based on the geometric information of the Nth frame point cloud to be encoded currently, N is an integer greater than 1, and the second geometric information is the reference corresponding to the Nth frame point cloud The reconstructed geometric information of the frame point cloud;
- the first determination module 802 is configured to determine the target context according to the occupancy of the first node and the neighbor nodes of the first node; the first node is the node corresponding to the second node in the tree structure corresponding to the second geometric information node, the second node is a sub-node to be encoded in the current node to be encoded in the tree structure corresponding to the first geometric information;
- the coding module 803 is configured to use the target context to perform entropy coding on the placeholder code of the second node.
- the first determining module 802 includes:
- a first calculation unit configured to calculate a weighted sum of the number of nodes occupied by the first node and M neighbor nodes, where the M neighbor nodes are at least some neighbor nodes of the first node;
- a first determining unit configured to determine the target context based on the weighted sum.
- the coding module 803 is specifically configured to perform the following operations:
- Entropy encoding is performed on the placeholder code of the second node by using the context corresponding to the index value in the first set of context.
- the M neighbor nodes include at least one of the following: co-planar neighbor nodes, collinear neighbor nodes, and co-point neighbor nodes.
- the weight value of the first node is greater than or equal to the weight value of the coplanar neighbor node
- the weight value of the coplanar neighbor node is greater than or equal to the weight value of the collinear neighbor node, so The weight value of the collinear neighbor nodes is greater than or equal to the weight value of the collinear neighbor nodes.
- the target context includes a first set of contexts for inter-frame coding or a second set of contexts for intra-frame coding.
- the first division module 801 is specifically configured to perform the following operations:
- the first node queue includes nodes that are occupied by corresponding space blocks in the tree structure constructed based on the first geometric information
- the first placeholder code includes the placeholder code of the current node to be coded.
- the first dividing module 801 is further configured to: when the current node to be encoded satisfies the isolated point encoding condition, and the current node to be encoded is a non-isolated node, the current node to be encoded Perform tree structure division to obtain child nodes of the current node to be encoded.
- the first division module 801 is specifically configured to perform the following operations:
- the first node queue includes nodes that are occupied by corresponding space blocks in the tree structure constructed based on the first geometric information
- the placeholder code of the current node to be coded based on the occupancy of the child nodes of the current coded node
- the first placeholder code includes the placeholder code of the current node to be coded.
- the first division module 801 is specifically configured to perform the following operations: in the case that the current node to be encoded satisfies the isolated point encoding condition, and the current node to be encoded is a non-isolated node, based on the current to-be-encoded node The occupancy of the sub-nodes of the node determines the occupancy code of the current node to be coded.
- the first division module 801 is also configured to perform the following operations:
- the second occupancy code includes the occupancy code of the fifth node occupancy code
- the isolated point coding conditions include:
- the directly encoded identifier of the geometric header information corresponding to the Nth frame point cloud is a preset value
- the spatial block corresponding to the current node to be encoded has side lengths in L directions greater than the preset minimum side length
- the sum of the Morton code bits to be encoded at the target point is greater than the preset times of L
- the target The points include points in the first geometric information located in the spatial block corresponding to the current node to be encoded, and L is a natural number
- the target node is a node associated with the current node to be encoded among the encoded nodes.
- the target node includes at least one of the following:
- a child node of a fifth node where the fifth node is a node corresponding to the current node to be encoded in the tree structure corresponding to the second geometric information;
- a child node of the neighbor node of the fifth node A child node of the neighbor node of the fifth node.
- the neighbor nodes of the fifth node include at least one of the following:
- the fact that the target node is occupied and the preset condition is satisfied includes at least one of the following:
- the number of nodes occupied by the target node is less than a second threshold
- the number of points located in the space block corresponding to the target node in the second geometric information is less than a third threshold.
- the device for encoding and processing point cloud geometric information provided in the embodiment of the present application can realize each process in the method embodiment in FIG. 4 , and details are not repeated here to avoid repetition.
- the execution subject may be the device for decoding and processing geometric information of point cloud, or, the point cloud device for decoding and processing geometric information of point cloud is used to execute point A control module of a cloud geometric information decoding processing method.
- the point cloud geometric information decoding processing device provided by the embodiment of the present application is described by taking the point cloud geometric information decoding processing device as an example to execute the point cloud geometric information decoding processing method.
- FIG. 9 is a structural diagram of a point cloud geometric information decoding processing device provided by an embodiment of the present application. As shown in FIG. 9, the point cloud geometric information decoding processing device 900 includes:
- the second division module 901 is configured to divide the second geometric information into a tree structure to obtain a second placeholder code, and the second geometric information is the reconstructed geometry of the reference frame point cloud corresponding to the Nth frame point cloud currently to be decoded information;
- the second determining module 902 is configured to determine the occupancy of the first node and the neighbor nodes of the first node based on the second occupancy code, and determine the target context;
- the first node is a tree corresponding to the second geometric information
- the node corresponding to the second node in the structure, the second node is a child node to be decoded in the current node to be decoded in the tree structure corresponding to the first geometric information, and the first geometric information is the point cloud of the Nth frame Decode the geometric information corresponding to the node;
- the decoding module 903 is configured to use the target context to perform entropy decoding on the geometric code stream corresponding to the second node to obtain a placeholder code corresponding to the second node;
- the reconstruction module 904 is configured to perform multi-tree reconstruction based on the placeholder code corresponding to the second node, and obtain geometric information of the second node.
- the second determination module 902 includes:
- a second calculation unit configured to calculate a weighted sum of the number of nodes occupied by the first node and M neighbor nodes, where the M neighbor nodes are at least some neighbor nodes of the first node;
- a second determining unit configured to determine the target context based on the weighted sum.
- the decoding module 903 is specifically configured to perform the following operations:
- Entropy decoding is performed on the placeholder code of the second node by using the context corresponding to the index value in the first set of context to obtain the placeholder code corresponding to the second node.
- the M neighbor nodes include at least one of the following: co-planar neighbor nodes, collinear neighbor nodes, and co-point neighbor nodes.
- the weight value of the first node is greater than or equal to the weight value of the coplanar neighbor node
- the weight value of the coplanar neighbor node is greater than or equal to the weight value of the collinear neighbor node, so The weight value of the collinear neighbor nodes is greater than or equal to the weight value of the collinear neighbor nodes.
- the target context includes a first set of contexts for inter-frame decoding or a second set of contexts for intra-frame decoding.
- the second division module 901 is specifically configured to perform the following operations:
- the first node queue includes nodes occupied by corresponding space blocks in the tree structure constructed based on the first geometric information
- the second dummy code includes the dummy code of the first node.
- the second division module 901 is further configured to: in the case that the current node to be decoded satisfies the isolated point decoding condition, and the current node to be decoded is a non-isolated node, tree the current node to be decoded The structure division is to obtain the child nodes of the current node to be decoded.
- the second division module 901 is specifically configured to perform the following operations:
- the first node queue includes nodes occupied by corresponding space blocks in the tree structure constructed based on the first geometric information
- the second dummy code includes the dummy code of the first node.
- the second division module 901 is further configured to: when the current node to be decoded satisfies the isolated point decoding condition and the current node to be decoded is a non-isolated node, based on the child nodes of the first node The occupancy status of the first node determines the occupancy code of the first node.
- the second division module 901 is further configured to: store the occupancy code of the first node.
- the outlier decoding conditions include:
- the direct decoding identifier of the geometric header information corresponding to the Nth frame point cloud is a preset value
- the spatial block corresponding to the current node to be decoded has side lengths in L directions greater than the preset minimum side length
- the sum of the Morton code bits to be decoded at the target point is greater than the preset times of L
- the target The points include points in the first geometric information located in the spatial block corresponding to the current node to be decoded, and L is a natural number
- the target node is a node associated with the current node to be decoded among the decoded nodes.
- the target node includes at least one of the following:
- a child node of a fifth node where the fifth node is a node corresponding to the current node to be decoded in the tree structure corresponding to the second geometric information;
- a child node of the neighbor node of the fifth node A child node of the neighbor node of the fifth node.
- the neighbor nodes of the fifth node include at least one of the following:
- the fact that the target node is occupied and the preset condition is satisfied includes at least one of the following:
- the number of nodes occupied by the target node is less than a second threshold
- the number of points located in the spatial block corresponding to the target node in the second geometric information is less than a third threshold.
- the device for decoding and processing point cloud geometric information provided in the embodiment of the present application can realize each process in the method embodiment in FIG. 7 , and details are not repeated here to avoid repetition.
- the device for encoding and processing point cloud geometric information and the device for decoding and processing point cloud geometric information in the embodiment of the present application may be a device, a device with an operating system or an electronic device, or a component, an integrated circuit, or a chip in a terminal.
- the device may be a mobile terminal or a non-mobile terminal.
- a mobile terminal may include but not limited to the types of terminals listed above, and a non-mobile terminal may be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (Personal Computer, PC), a television (Television , TV), teller machines or self-service machines, etc., are not specifically limited in this embodiment of the present application.
- the point cloud geometric information encoding processing device and the point cloud geometric information decoding processing device provided in the embodiment of the present application can realize the various processes of the method embodiments in Fig. 4 to Fig. 7 and achieve the same technical effect. In order to avoid repetition, I won't go into details here.
- the embodiment of the present application also provides a communication device 1000, including a processor 1001, a memory 1002, and a program or instruction stored in the memory 1002 and operable on the processor 1001, for example, the program Or, when the instructions are executed by the processor 1001, the processes of the above-mentioned method for encoding and processing geometric information of point cloud or the method for decoding and processing of geometric information of point cloud can be achieved, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.
- the embodiment of the present application also provides a terminal, including a processor and a communication interface, and the processor is configured to perform the following operations: perform synchronous tree division on the first geometric information and the second geometric information, and obtain the information corresponding to the first geometric information
- the first placeholder code and the second placeholder code corresponding to the second geometric information the first geometric information is obtained by preprocessing the geometric information of the Nth frame point cloud to be encoded currently, and N is an integer greater than 1
- the second geometric information is the reconstruction geometric information of the reference frame point cloud corresponding to the Nth frame point cloud; according to the occupancy of the first node and the neighbor nodes of the first node, determine the target context;
- the first node is the node corresponding to the second node in the tree structure corresponding to the second geometric information, and the second node is a child node to be encoded in the current node to be encoded in the tree structure corresponding to the first geometric information; using the The target context performs entropy encoding on the placeholder code of the second node.
- the processor is configured to perform the following operations: divide the second geometric information into a tree structure to obtain a second placeholder code, the second geometric information is the reconstruction of the reference frame point cloud corresponding to the Nth frame point cloud currently to be decoded Geometric information; determine the occupancy of the first node and the neighbor nodes of the first node based on the second occupancy code, and determine the target context; the first node is the second node in the tree structure corresponding to the second geometric information The node corresponding to the node, the second node is a child node to be decoded in the current node to be decoded in the tree structure corresponding to the first geometric information, and the first geometric information is the geometry corresponding to the decoded node of the Nth frame point cloud information; using the target context to perform entropy decoding on the geometric code stream corresponding to the second node to obtain a placeholder code corresponding to the second node; perform multi-fork tree reconstruction based on the placeholder code corresponding to the second node to obtain Geometry information of the second node
- FIG. 11 is a schematic diagram of a hardware structure of a terminal implementing various embodiments of the present application.
- the terminal 1100 includes, but is not limited to: a radio frequency unit 1101, a network module 1102, an audio output unit 1103, an input unit 1104, a sensor 1105, a display unit 1106, a user input unit 1107, an interface unit 1108, a memory 1109, and a processor 1110. At least some parts.
- the terminal 1100 may also include a power supply (such as a battery) for supplying power to various components, and the power supply may be logically connected to the processor 1110 through the power management system, so as to manage charging, discharging, and power consumption through the power management system. Management and other functions.
- a power supply such as a battery
- the terminal structure shown in FIG. 11 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine some components, or arrange different components, which will not be repeated here.
- the input unit 1104 may include a graphics processor (Graphics Processing Unit, GPU) and a microphone, and the graphics processor is used by an image capture device (such as a camera) in a video capture mode or an image capture mode.
- the obtained image data of still picture or video is processed.
- the display unit 1106 may include a display panel, and the display panel may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like.
- the user input unit 1107 includes a touch panel and other input devices. Touch panel 11071, also called touch screen.
- the touch panel can include two parts: a touch detection device and a touch controller.
- Other input devices may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, and joysticks, which will not be repeated here.
- the radio frequency unit 1101 receives the downlink data from the network side device, and processes it to the processor 1110; in addition, sends the uplink data to the network side device.
- the radio frequency unit 1101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
- the memory 1109 can be used to store software programs or instructions as well as various data.
- the memory 1109 may mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area may store an operating system, an application program or instructions required by at least one function (such as a sound playback function, an image playback function, etc.) and the like.
- the memory 1109 may include a high-speed random access memory, and may also include a non-transitory memory, wherein the non-transitory memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM) , PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
- ROM Read-Only Memory
- PROM programmable read-only memory
- PROM erasable programmable read-only memory
- Erasable PROM Erasable PROM
- EPROM electrically erasable programmable read-only memory
- EEPROM electrically erasable programmable read-only memory
- flash memory for example at least one disk storage device, flash memory device, or other non-transitory solid state storage device.
- the processor 1110 may include one or more processing units; optionally, the processor 1110 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, application programs or instructions, etc., Modem processors mainly handle wireless communications, such as baseband processors. It can be understood that the foregoing modem processor may not be integrated into the processor 1110 .
- processor 1110 is configured to perform the following operations:
- the first node is a node corresponding to the second node in the tree structure corresponding to the second geometric information
- the second node is A child node to be encoded in the current node to be encoded in the tree structure corresponding to the first geometric information
- Entropy encoding is performed on the placeholder code of the second node by using the target context.
- processor 1110 is configured to perform the following operations:
- the second geometric information is the reconstruction geometric information of the reference frame point cloud corresponding to the Nth frame point cloud currently to be decoded;
- the first node corresponds to the second node in the tree structure corresponding to the second geometric information node
- the second node is a child node to be decoded in the current node to be decoded in the tree structure corresponding to the first geometric information
- the first geometric information is the geometric information corresponding to the decoded node of the Nth frame point cloud
- processor 1110 can implement various processes implemented by the terminal in the method embodiments in FIGS. 4 and 7 . To avoid repetition, details are not repeated here.
- the embodiment of the present application also provides a readable storage medium, the readable storage medium may be nonvolatile or volatile, the readable storage medium stores programs or instructions, and the programs or instructions are stored in When the processor executes, it realizes each process of the above embodiment of the method for encoding and processing geometric information of point cloud or the method for decoding and processing of geometric information of point cloud, and can achieve the same technical effect. To avoid repetition, details are not repeated here.
- the embodiment of the present application also provides a computer program product, the computer program product is stored in a non-transitory storage medium, and the computer program product is executed by at least one processor to implement the above-mentioned geometric information encoding processing method of point cloud Or the various processes of the embodiment of the geometric information decoding processing method of the point cloud, and can achieve the same technical effect, in order to avoid repetition, no more details are given here.
- the processor is the processor in the electronic device described in the above embodiments.
- the readable storage medium includes computer readable storage medium, such as computer read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
- the embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to realize the above-mentioned geometric information encoding of the point cloud
- the chip includes a processor and a communication interface
- the communication interface is coupled to the processor
- the processor is used to run programs or instructions to realize the above-mentioned geometric information encoding of the point cloud
- chips mentioned in the embodiments of the present application may also be called system-on-chip, system-on-chip, system-on-a-chip, or system-on-a-chip.
- the embodiment of the present application further provides a program product, the program product is stored in a non-transitory storage medium, and the program product is executed by at least one processor to implement the above-mentioned geometric information encoding processing method of point cloud or point cloud
- the program product is executed by at least one processor to implement the above-mentioned geometric information encoding processing method of point cloud or point cloud
- the term “comprising”, “comprising” or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase “comprising a " does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.
- the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions are performed, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
- the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation.
- the technical solution of the present application can be embodied in the form of computer software products, which are stored in a storage medium (such as ROM/RAM, magnetic disk, etc.) , optical disc), including several instructions to enable a terminal (which may be a mobile phone, computer, server, air conditioner, or base station, etc.) to execute the methods described in various embodiments of the present application.
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Abstract
Description
Claims (43)
- 一种点云的几何信息编码处理方法,包括:对第一几何信息和第二几何信息进行同步树划分,获得所述第一几何信息对应的第一占位码和所述第二几何信息对应的第二占位码;所述第一几何信息基于当前待编码的第N帧点云的几何信息进行预处理得到,N为大于1的整数,所述第二几何信息为所述第N帧点云对应的参考帧点云的重建几何信息;根据第一节点和第一节点的邻居节点的占据情况,确定目标上下文;所述第一节点为所述第二几何信息对应的树结构中与第二节点对应的节点,所述第二节点为所述第一几何信息对应的树结构中当前待编码节点中待编码子节点;利用所述目标上下文对所述第二节点的占位码进行熵编码。
- 根据权利要求1所述的方法,其中,所述根据第一节点和第一节点的邻居节点的占据情况,确定目标上下文的步骤,包括:计算第一节点和M个邻居节点中被占据的节点数的加权和,所述M个邻居节点为所述第一节点的至少部分邻居节点;基于所述加权和确定所述目标上下文。
- 根据权利要求2所述的方法,其中,在所述目标上下文包括用于帧间编码的第一套上下文的情况下,利用所述目标上下文对所述第二节点的占位码进行熵编码的步骤,包括:基于所述加权和以及第三节点的占据情况和第四节点的占据情况是否相同确定索引值,所述第三节点为所述第一节点的前一个节点,所述第四节点为所述第二节点的前一个节点;利用所述第一套上下文中与所述索引值对应的上下文,对所述第二节点的占位码进行熵编码。
- 根据权利要求2所述的方法,其中,所述M个邻居节点包括以下至少一项:共面的邻居节点、共线的邻居节点和共点的邻居节点。
- 根据权利要求4所述的方法,其中,所述第一节点的权重值大于或等 于所述共面的邻居节点权重值,所述共面的邻居节点的权重值大于或等于所述共线的邻居节点的权重值,所述共线的邻居节点的权重值大于或等于共点的邻居节点的权重值。
- 根据权利要求1至5中任一项所述的方法,其中,所述目标上下文包括用于帧间编码的第一套上下文或用于帧内编码的第二套上下文。
- 根据权利要求1所述的方法,其中,对所述第一几何信息进行树结构划分,获得所述第一几何信息对应的第一占位码,包括:遍历第一节点队列中的节点,获得所述当前待编码节点,所述第一节点队列包括基于所述第一几何信息已构建的树结构中对应的空间块被占据的节点;确定所述当前待编码节点是否满足孤立点编码条件;在所述当前待编码节点不满足孤立点编码条件的情况下,对所述当前待编码节点进行树结构划分,获得所述当前待编码节点的子节点;基于所述当前待编码节点的子节点的占据情况确定所述当前待编码节点的占位码;其中,所述第一占位码包括所述当前待编码节点的占位码。
- 根据权利要求7所述的方法,其中,所述确定所述当前待编码节点是否满足孤立点编码条件的步骤之后,所述方法还包括:在所述当前待编码节点满足孤立点编码条件,且所述当前待编码节点为非孤立节点的情况下,对所述当前待编码节点进行树结构划分,获得所述当前待编码节点的子节点。
- 根据权利要求1所述的方法,其中,对所述第一几何信息进行树结构划分,获得所述第一几何信息对应的第一占位码,包括:遍历第一节点队列中的节点,获得所述当前待编码节点,所述第一节点队列包括基于所述第一几何信息已构建的树结构中对应的空间块被占据的节点;对所述当前待编码节点进行树结构划分,获得所述当前待编码节点的子节点;确定所述当前待编码节点是否满足孤立点编码条件;在所述当前待编码节点不满足孤立点编码条件的情况下,基于所述当前待编码节点的子节点的占据情况确定所述当前待编码节点的占位码;其中,所述第一占位码包括所述当前待编码节点的占位码。
- 根据权利要求9所述的方法,其中,所述确定所述当前待编码节点是否满足孤立点编码条件的步骤之后,所述方法还包括:在所述当前待编码节点满足孤立点编码条件,且所述当前待编码节点为非孤立节点的情况下,基于所述当前待编码节点的子节点的占据情况确定所述当前待编码节点的占位码。
- 根据权利要求7至10中任一项所述的方法,其中,对所述第二几何信息进行树结构划分,获得所述第二几何信息对应的第二占位码,包括:对所述第二几何信息对应的树结构中与当前待编码节点对应的第五节点进行结构树划分,获得所述第五节点的占据码;所述第二占据码包括所述第五节点的占据码存储所述第五节点的占据码。
- 根据权利要求7至10中任一项所述的方法,其中,所述孤立点编码条件包括:所述第N帧点云对应的几何头信息的直接编码标识符为预设值;在所述当前待编码节点对应的空间块存在L个方向的边长大于预设最小边长的情况下,目标点的待编码莫顿码位数之和大于L的预设倍,所述目标点包括所述第一几何信息中位于所述当前待编码节点对应的空间块内的点,L为自然数;目标节点被占据的情况满足预设条件;其中,所述目标节点为已编码节点中与所述当前待编码节点关联的节点。
- 根据权利要求12所述的方法,其中,所述目标节点包括以下至少一项:第五节点的子节点,所述第五节点为所述第二几何信息对应的树结构中与所述当前待编码节点对应的节点;第五节点的邻居节点;第五节点的邻居节点的子节点。
- 根据权利要求13所述的方法,其中,第五节点的邻居节点包括以下至少一项:所述第五节点的同层节点;所述第五节点的父节点对应的同层节点的子节点。
- 根据权利要求12所述的方法,其中,所述目标节点被占据的情况满足预设条件包括以下至少一项:所述目标节点被占据的节点数小于第二阈值;所述第二几何信息中位于所述目标节点对应的空间块内的点的数量小于第三阈值。
- 一种点云的几何信息解码处理方法,包括:对第二几何信息进行树结构划分,获得第二占位码,所述第二几何信息为当前待解码的第N帧点云对应的参考帧点云的重建几何信息;基于所述第二占位码确定第一节点和第一节点的邻居节点的占据情况,确定目标上下文;所述第一节点为所述第二几何信息对应的树结构中与第二节点对应的节点,所述第二节点为第一几何信息对应的树结构中当前待解码节点中待解码子节点,所述第一几何信息为所述第N帧点云已解码节点对应的几何信息;利用所述目标上下文对所述第二节点对应的几何码流进行熵解码,获得第二节点对应的占位码;基于所述第二节点对应的占位码进行多叉树重建,获得所述第二节点的几何信息。
- 根据权利要求16所述的方法,其中,所述基于所述第二占位码确定第一节点和第一节点的邻居节点的占据情况,确定目标上下文的步骤,包括:计算第一节点和M个邻居节点中被占据的节点数的加权和,所述M个邻居节点为所述第一节点的至少部分邻居节点;基于所述加权和确定所述目标上下文。
- 根据权利要求17所述的方法,其中,在所述目标上下文包括用于帧间解码的第一套上下文的情况下,利用所述目标上下文对所述第二节点对应的几何码流进行熵解码,获得所述第二节点对应的占位码的步骤,包括:基于所述加权和以及第三节点的占据情况和第四节点的占据情况是否相同确定索引值,所述第三节点为所述第一节点的前一个节点,所述第四节点为所述第二节点的前一个节点;利用所述第一套上下文中与所述索引值对应的上下文,对所述第二节点的占位码进行熵解码,获得所述第二节点对应的占位码。
- 根据权利要求17所述的方法,其中,所述M个邻居节点包括以下至少一项:共面的邻居节点、共线的邻居节点和共点的邻居节点。
- 根据权利要求19所述的方法,其中,所述第一节点的权重值大于或等于所述共面的邻居节点权重值,所述共面的邻居节点的权重值大于或等于所述共线的邻居节点的权重值,所述共线的邻居节点的权重值大于或等于共点的邻居节点的权重值。
- 根据权利要求16至20中任一项所述的方法,其中,所述目标上下文包括用于帧间解码的第一套上下文或用于帧内解码的第二套上下文。
- 根据权利要求16所述的方法,其中,对所述第一几何信息进行树结构划分,获得所述第一几何信息对应的第一占位码,包括:遍历第一节点队列中的节点,获得所述当前待解码节点,所述第一节点队列包括基于所述第一几何信息已构建的树结构中对应的空间块被占据的节点;确定所述当前待解码节点是否满足孤立点解码条件;在所述当前待解码节点不满足孤立点解码条件的情况下,对所述第一节点进行树结构划分,获得所述第一节点的子节点;基于所述第一节点的子节点的占据情况确定所述第一节点的占位码;其中,所述第二占位码包括所述第一节点的占位码。
- 根据权利要求22所述的方法,其中,所述确定所述当前待解码节点是否满足孤立点解码条件的步骤之后,所述方法还包括:在所述当前待解码节点满足孤立点解码条件,且所述当前待解码节点为非孤立节点的情况下,对所述当前待解码节点进行树结构划分,获得所述当前待解码节点的子节点。
- 根据权利要求16所述的方法,其中,对所述第一几何信息进行树结 构划分,获得所述第一几何信息对应的第一占位码,包括:遍历第一节点队列中的节点,获得所述当前待解码节点,所述第一节点队列包括基于所述第一几何信息已构建的树结构中对应的空间块被占据的节点;对所述第一节点进行树结构划分,获得所述第一节点的子节点;确定所述当前待解码节点是否满足孤立点解码条件;在所述当前待解码节点不满足孤立点解码条件的情况下,基于所述第一节点的子节点的占据情况确定所述第一节点的占位码;其中,所述第二占位码包括所述第一节点的占位码。
- 根据权利要求24所述的方法,其中,所述确定所述当前待解码节点是否满足孤立点解码条件的步骤之后,所述方法还包括:在所述当前待解码节点满足孤立点解码条件,且所述当前待解码节点为非孤立节点的情况下,基于所述第一节点的子节点的占据情况确定所述第一节点的占位码。
- 根据权利要求22至25中任一项所述的方法,其中,所述方法还包括:存储所述第一节点的占位码。
- 根据权利要求22至25中任一项所述的方法,其中,所述孤立点解码条件包括:所述第N帧点云对应的几何头信息的直接解码标识符为预设值;在所述当前待解码节点对应的空间块存在L个方向的边长大于预设最小边长的情况下,目标点的待解码莫顿码位数之和大于L的预设倍,所述目标点包括所述第一几何信息中位于所述当前待解码节点对应的空间块内的点,L为自然数;目标节点被占据的情况满足预设条件;其中,所述目标节点为已解码节点中与所述当前待解码节点关联的节点。
- 根据权利要求27所述的方法,其中,所述目标节点包括以下至少一项:第五节点的子节点,所述第五节点为所述第二几何信息对应的树结构中与所述当前待解码节点对应的节点;第五节点的邻居节点;第五节点的邻居节点的子节点。
- 根据权利要求28所述的方法,其中,第五节点的邻居节点包括以下至少一项:所述第五节点的同层节点;所述第五节点的父节点对应的同层节点的子节点。
- 根据权利要求27所述的方法,其中,所述目标节点被占据的情况满足预设条件包括以下至少一项:所述目标节点被占据的节点数小于第二阈值;所述第二几何信息中位于所述目标节点对应的空间块内的点的数量小于第三阈值。
- 一种点云的几何信息编码处理装置,包括:第一划分模块,用于对第一几何信息和第二几何信息进行同步树划分,获得所述第一几何信息对应的第一占位码和所述第二几何信息对应的第二占位码;所述第一几何信息基于当前待编码的第N帧点云的几何信息进行预处理得到,N为大于1的整数,所述第二几何信息为所述第N帧点云对应的参考帧点云的重建几何信息;第一确定模块,用于根据第一节点和第一节点的邻居节点的占据情况,确定目标上下文;所述第一节点为所述第二几何信息对应的树结构中与第二节点对应的节点,所述第二节点为所述第一几何信息对应的树结构中当前待编码节点中待编码子节点;编码模块,用于利用所述目标上下文对所述第二节点的占位码进行熵编码。
- 根据权利要求31所述的装置,其中,所述第一确定模块包括:第一计算单元,用于计算第一节点和M个邻居节点中被占据的节点数的加权和,所述M个邻居节点为所述第一节点的至少部分邻居节点;第一确定单元,用于基于所述加权和确定所述目标上下文。
- 根据权利要求32所述的装置,其中,在所述目标上下文包括用于帧间编码的第一套上下文的情况下,所述编码模块具体用于执行以下操作:基于所述加权和以及第三节点的占据情况和第四节点的占据情况是否相同确定索引值,所述第三节点为所述第一节点的前一个节点,所述第四节点为所述第二节点的前一个节点;利用所述第一套上下文中与所述索引值对应的上下文,对所述第二节点的占位码进行熵编码。
- 根据权利要求32所述的装置,其中,所述M个邻居节点包括以下至少一项:共面的邻居节点、共线的邻居节点和共点的邻居节点。
- 一种点云的几何信息解码处理装置,包括:第二划分模块,用于对第二几何信息进行树结构划分,获得第二占位码,所述第二几何信息为当前待解码的第N帧点云对应的参考帧点云的重建几何信息;第二确定模块,用于基于所述第二占位码确定第一节点和第一节点的邻居节点的占据情况,确定目标上下文;所述第一节点为所述第二几何信息对应的树结构中与第二节点对应的节点,所述第二节点为第一几何信息对应的树结构中当前待解码节点中待解码子节点,所述第一几何信息为所述第N帧点云已解码节点对应的几何信息;解码模块,用于利用所述目标上下文对所述第二节点对应的几何码流进行熵解码,获得第二节点对应的占位码;重建模块,用于基于所述第二节点对应的占位码进行多叉树重建,获得所述第二节点的几何信息。
- 根据权利要求35所述的装置,其中,所述第二确定模块包括:第二计算单元,用于计算第一节点和M个邻居节点中被占据的节点数的加权和,所述M个邻居节点为所述第一节点的至少部分邻居节点;第二确定单元,用于基于所述加权和确定所述目标上下文。
- 根据权利要求36所述的装置,其中,在所述目标上下文包括用于帧间解码的第一套上下文的情况下,所述解码模块具体用于执行以下操作:基于所述加权和以及第三节点的占据情况和第四节点的占据情况是否相同确定索引值,所述第三节点为所述第一节点的前一个节点,所述第四节点为所述第二节点的前一个节点;利用所述第一套上下文中与所述索引值对应的上下文,对所述第二节点的占位码进行熵解码,获得所述第二节点对应的占位码。
- 根据权利要求36所述的装置,其中,所述M个邻居节点包括以下至少一项:共面的邻居节点、共线的邻居节点和共点的邻居节点。
- 一种终端,包括:存储器、处理器及存储在所述存储器上并可在所述处理器上运行的程序,所述程序被所述处理器执行时实现如权利要求1至15中任一项所述的点云的几何信息编码处理方法中的步骤,或者所述程序或指令被处理器执行时实现如权利要求16至30中任一项所述的点云的几何信息解码处理方法中的步骤。
- 一种可读存储介质,所述可读存储介质上存储程序或指令,所述程序被所述处理器执行时实现如权利要求1至15中任一项所述的点云的几何信息编码处理方法中的步骤,或者所述程序或指令被处理器执行时实现如权利要求16至30中任一项所述的点云的几何信息解码处理方法中的步骤。
- 一种芯片,包括处理器和通信接口,其中,所述通信接口和所述处理器耦合,所述处理器用于运行程序或指令,实现如权利要求1至15中任一项所述的点云的几何信息编码处理方法中的步骤,或者,实现如权利要求16至30中任一项所述的点云的几何信息解码处理方法中的步骤。
- 一种计算机程序产品,其中,所述计算机程序产品被存储在非瞬态的可读存储介质中,所述计算机程序产品被至少一个处理器执行以实现如权利要求1至15中任一项所述的点云的几何信息编码处理方法中的步骤,或者,所述计算机程序产品被至少一个处理器执行以实现如权利要求16至30中任一项所述的点云的几何信息解码处理方法中的步骤。
- 一种通信设备,被配置为执行如权利要求1至15中任一项所述的点云的几何信息编码处理方法中的步骤,或者,被配置为执行如权利要求16至30中任一项所述的点云的几何信息解码处理方法中的步骤。
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| WO2024145935A1 (zh) * | 2023-01-06 | 2024-07-11 | Oppo广东移动通信有限公司 | 点云编解码方法、装置、设备及存储介质 |
| CN120188479A (zh) * | 2023-01-06 | 2025-06-20 | Oppo广东移动通信有限公司 | 点云编解码方法、装置、设备及存储介质 |
| WO2024145934A1 (zh) * | 2023-01-06 | 2024-07-11 | Oppo广东移动通信有限公司 | 点云编解码方法、装置、设备及存储介质 |
| CN118338019B (zh) * | 2023-01-11 | 2025-09-02 | 维沃移动通信有限公司 | 点云编码方法、点云解码方法、装置及通信设备 |
| WO2024197680A1 (zh) * | 2023-03-29 | 2024-10-03 | Oppo广东移动通信有限公司 | 点云编解码方法、装置、设备及存储介质 |
| WO2024216476A1 (zh) * | 2023-04-17 | 2024-10-24 | Oppo广东移动通信有限公司 | 编解码方法、编码器、解码器、码流以及存储介质 |
| WO2024216493A1 (zh) * | 2023-04-18 | 2024-10-24 | Oppo广东移动通信有限公司 | 点云编解码方法、编码器、解码器、码流及存储介质 |
| CN116634179A (zh) * | 2023-05-26 | 2023-08-22 | 腾讯科技(深圳)有限公司 | 点云数据处理方法、装置、电子设备及存储介质 |
| WO2025077881A1 (en) * | 2023-10-13 | 2025-04-17 | Douyin Vision (Beijing) Co., Ltd. | Method, apparatus, and medium for point cloud coding |
| CN120343259A (zh) * | 2024-01-17 | 2025-07-18 | 维沃移动通信有限公司 | 编解码方法及相关设备 |
| CN120835158A (zh) * | 2024-04-17 | 2025-10-24 | 维沃移动通信有限公司 | Trisoup顶点优化方法、装置及设备 |
| CN118678084B (zh) * | 2024-07-16 | 2025-10-17 | 鹏城实验室 | 点云数据编解码方法、装置、计算机设备及可读存储介质 |
| CN119967190B (zh) * | 2025-01-27 | 2026-02-03 | 重庆邮电大学 | 一种基于lstm网络预测的动态点云快速编码方法 |
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| WO2024145912A1 (zh) * | 2023-01-06 | 2024-07-11 | Oppo广东移动通信有限公司 | 点云编解码方法、装置、设备及存储介质 |
| CN119815053A (zh) * | 2023-10-10 | 2025-04-11 | 维沃移动通信有限公司 | 点云属性编码方法、点云属性解码方法、装置及电子设备 |
| WO2025138030A1 (zh) * | 2023-12-28 | 2025-07-03 | Oppo广东移动通信有限公司 | 编解码方法、点云编码器、点云解码器以及存储介质 |
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