Registration-based improved V-PCC inter-frame prediction method and system

A V-PCC and inter-frame prediction technology, which is applied in digital video signal modification, electrical components, image communication, etc., can solve problems such as disorder, achieve small residual error, reduce coding, and improve coding performance

Pending Publication Date: 2021-10-29
FUZHOU UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, compared with traditional 2D images, the order of point clouds exceeds at least an order of magnitude and is disordered.

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  • Registration-based improved V-PCC inter-frame prediction method and system
  • Registration-based improved V-PCC inter-frame prediction method and system
  • Registration-based improved V-PCC inter-frame prediction method and system

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0039] Please refer to figure 1 and 2 ,, the present invention provides a registration-based improved V-PCC inter-frame prediction method, including an encoding process and a decoding process:

[0040] The encoding process includes the following steps:

[0041] Step S1: Based on the rough segmentation of the binary tree based on motion consistency, the current frame point cloud is divided into 2 5 block, and calculate the distance from the centroid of the point cloud in the block to the origin, sort by the size of the distance, give the corresponding block its index information, and use the reference frame point cloud used to predict the current frame to predict the current frame according to the segmentation information of the current frame. The same division and the index information corresponding to the given block are divided into 2 corresponding...

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Abstract

The invention relates to an improved V-PCC inter-frame prediction method based on registration. The method comprises the following steps: S1, segmenting a point cloud of a current frame based on a binary tree coarse segmentation algorithm of motion consistency, calculating the distance from the center of mass of the point cloud in a block to an original point, carrying out the sequential sorting according to the size of the distance, and giving the index information to a corresponding block; s2, carrying out three-dimensional registration inter-frame prediction on the segmented blocks, calculating errors, and carrying out direct entropy coding on block indexes and motion information of the blocks with the errors smaller than a certain threshold value; and for the blocks of which the errors are greater than a threshold value, fusing and using inter-frame estimation of V-PCC, and finally forming a bit stream. According to the invention, the coding performance of the V-PCC is effectively improved.

Description

technical field [0001] The invention relates to a registration-based improved V-PCC inter-frame prediction method and system. Background technique [0002] From a mathematical point of view, a point cloud is a collection of points. The physical meaning is a digital sampling of the three-dimensional real world. Each point is composed of geometric information (x, y, z) attribute information (for example, R, G, B, reflection intensity Wait). Compared with traditional 2D images, 3D point clouds can more accurately express target objects or scenes. At present, it has been widely used in fields such as virtual reality and augmented reality, unmanned driving, medical treatment, and high-precision maps. However, point clouds are at least an order of magnitude larger and disordered than traditional 2D images. At present, for a typical dynamic point cloud sequence used for point cloud coding performance testing, each frame of point cloud usually contains nearly a million points, ea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/159H04N19/51H04N19/96
CPCH04N19/159H04N19/51H04N19/96
Inventor 郑明魁王适陈建王泽峰邱鑫
Owner FUZHOU UNIV
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