3D Point Cloud Encoding with Precomputed Global Coordinates

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Solution Overview

Problem

Existing three-dimensional data encoding and decoding methods require significant processing power due to the need for calculating global coordinates, which increases the computational load on decoding devices.

Innovation Solution

The proposed method encodes local and global coordinate information separately, allowing decoding devices to bypass the calculation of global coordinates, thereby reducing the processing load.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If global coordinates are calculated during decoding, then coordinate accuracy is maintained, but processing load on decoding device increases

Engineering Contradiction:

Improvecoordinate accuracyVSAvoidprocessing load

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-calculating and encoding global coordinates during the encoding phase. The decoding device receives both local coordinates and pre-computed global coordinates in the bitstream, eliminating the need to perform complex coordinate transformation calculations during decoding. This shifts the computational burden from the decoding device to the encoding device, reducing processing load while maintaining coordinate accuracy.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If local coordinates are used, then data transmission efficiency improves, but coordinate independence from sensor location is lost

Engineering Contradiction:

Improvedata transmission efficiencyVSAvoidcoordinate independence

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent merges two coordinate systems by encoding and transmitting both local coordinates and global coordinates in the bitstream. The local coordinates provide efficient data representation relative to the sensor, while the global coordinates provide independence from sensor location. By combining both coordinate systems, the patent achieves both data transmission efficiency and coordinate adaptability without requiring complex real-time transformations.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250373833A1Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device

Publication Date: 2025.12.04 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

A three-dimensional data encoding method of encoding three-dimensional points obtained by a sensor includes: encoding local coordinate information indicating sets of local coordinates that are coordinates of the three-dimensional points and are dependent on a location of the sensor; and generating an encoded bitstream including the local coordinate information encoded and global coordinate information indicating global coordinates that are coordinates of a reference point or at least one of the three-dimensional points and are independent from the location of the sensor.