Inter-frame coding and decoding method for compressing three-dimensional sonar point cloud data

An encoding and decoding method and point cloud data technology are applied in the field of inter-frame encoding and decoding for compressing three-dimensional sonar point cloud data, and achieve the effect of important engineering use value and compression size.

Pending Publication Date: 2022-03-04
苏州联视泰电子信息技术有限公司
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Problems solved by technology

This method converts the 3D point cloud into a 2D image and realizes the compression of the 3D point cloud according to the image compression method. This method is not suitable for the compression of the submarine 3D sonar point cloud data.

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  • Inter-frame coding and decoding method for compressing three-dimensional sonar point cloud data
  • Inter-frame coding and decoding method for compressing three-dimensional sonar point cloud data

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0034] figure 1 is the system architecture of the three-dimensional sonar system provided by the embodiment. Such as figure 1 As shown, the three-dimensional sonar system includes a lower computer and an upper computer, wherein, the acoustic wave emitting array in the lower computer emits sound waves of a fixed frequency, and receives the sound wave signal of the returned frequency band through the sound wave receiving array, and the sound wave signal passes through the FPGA. After a series of signal processing, threshold filtering, and outlier removal, the 3D sonar po...

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Abstract

The invention discloses an inter-frame coding and decoding method for compressing three-dimensional point cloud data, which comprises the following steps of: performing geometric coding and attribute coding on a reference frame and a current frame by using an octree coding mode to obtain an occupation code and a neighborhood correlation entropy context of each node; calculating a voxel block position set where each centroid of the point cloud in the frame is located; according to the neighborhood correlation entropy context, searching a corresponding reference voxel block of the voxel block where the centroid is located in the current frame in a corresponding reference frame by using a motion search algorithm; taking a motion vector of a voxel block where the centroid of the point cloud is located from a reference frame to a current frame as a predicted motion vector of each voxel block, calculating a motion vector residual error and an attribute difference value of the predicted motion vector of each voxel block and an actual motion vector, and performing Huffman coding after coding; and during decoding, superposing the motion vector and the attribute difference value on the geometric position and the attribute of the reference frame to obtain the current frame. The method is high in compression efficiency, high in encoding and decoding speed and high in data restoration quality.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional point cloud encoding and decoding, and in particular relates to an inter-frame encoding and decoding method for compressing three-dimensional sonar point cloud data. Background technique [0002] The 3D sonar system emits fixed-frequency sound waves through the sound wave transmitting array, and receives the returned sound wave signal in the transmitting frequency band through the receiving array, and obtains the underwater 3D sonar point cloud data after a series of signal processing in the lower computer, and transmits The protocol transmits data to the upper computer for real-time display of images. [0003] Since the data volume of the 3D sonar point cloud data obtained by the 3D sonar system after acquisition and signal processing is very large, and engineering requirements require real-time display of images and storage of single frame data, which leads to data storage and data tra...

Claims

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Application Information

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IPC IPC(8): H04N19/597H04N19/159H04N19/96H04N19/94
CPCH04N19/597H04N19/159H04N19/96H04N19/94
Inventor 林怡格顾梦奇
Owner 苏州联视泰电子信息技术有限公司
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