Point cloud attribute coding method, decoding method, coding device and decoding device

A coding method and attribute technology, which is applied in the field of point cloud processing, can solve the problems of ineffective use of sub-node attribute correlation, poor compression performance of point cloud attributes, etc., and achieve the effect of improving compression performance and improving utilization

Pending Publication Date: 2022-03-15
PENG CHENG LAB
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Problems solved by technology

[0005] The present invention provides a point cloud attribute encoding method, a decoding method, an encoding device and a decoding device, aiming to solve the problem that the existing point cloud attribute encoding and decoding methods cannot effectively utilize the attribute correlation between sub-nodes, resulting in poor point cloud attribute compression performance. bad question

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  • Point cloud attribute coding method, decoding method, coding device and decoding device
  • Point cloud attribute coding method, decoding method, coding device and decoding device
  • Point cloud attribute coding method, decoding method, coding device and decoding device

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Embodiment Construction

[0070] The present invention provides a point cloud attribute encoding method, decoding method, encoding device and decoding device. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0071] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operati...

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Abstract

The invention discloses a point cloud attribute coding method, a decoding method, coding equipment and decoding equipment, and the method comprises the steps: obtaining a child node of a target node for an N-2 layer of an N-layer K-D tree structure, calculating a first attribute coefficient of the child node, and obtaining a first attribute coefficient and a second attribute coefficient of the target node; for a target node from an N-3 layer to a first layer of the N-layer K-D tree structure, obtaining two sub-nodes of the target node, and performing Haar wavelet transform on first attribute coefficients of the two sub-nodes to obtain a first attribute coefficient and a second attribute coefficient of the target node; and taking the first attribute coefficient of the root node and the second attribute coefficient of each target node in the K-D tree structure as an output coefficient of the point cloud attribute coding method. According to the point cloud attribute coding method and the point cloud attribute decoding method provided by the invention, the utilization of the attribute correlation between the sub-nodes can be improved, and the compression performance of the point cloud attribute is effectively improved.

Description

technical field [0001] The present invention relates to the technical field of point cloud processing, in particular to a point cloud attribute encoding method, decoding method, encoding device and decoding device. Background technique [0002] 3D point cloud is an important form of digitalization of the real world. With the rapid development of 3D scanning equipment (such as laser, radar, etc.), the accuracy and resolution of point clouds have become higher. High-precision point clouds are widely used in the construction of urban digital maps, and play a technical supporting role in many popular researches such as smart cities, unmanned driving, and cultural relics protection. The point cloud is obtained by sampling the surface of an object by a 3D scanning device. The number of points in a frame of point cloud is generally in the millions, and each point contains geometric information, color, reflectivity and other attribute information, and the amount of data is very lar...

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Application Information

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IPC IPC(8): G06T17/00G06T9/00G06T7/90G06F17/14
CPCG06T17/005G06T9/001G06T7/90G06F17/148G06T2207/10028G06F17/14G06T17/00G06T9/00G06T9/40
Inventor 陈悦汝王静李革高文
Owner PENG CHENG LAB
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