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Google patents method to compress 3D mesh data using local surface planes

This filing describes a way to shrink the file size of 3D models by guessing the position of points based on their neighbors. It uses the flatness of the local surface to calculate more accurate predictions, which reduces the amount of data needed to store each point.

Why it mattersIt could make streaming or storing complex 3D environments, like those in virtual reality or games, more efficient by using less bandwidth.

In the filing’s own words

Methods and systems for compressing and decompressing vertex data in a mesh include identifying a target vertex to be compressed and a plurality of neighboring vertices. A first predicted position for the target vertex is determined based on the positions of the neighboring vertices, a normal vector for a plane defined by the neighboring vertices is determined, and a dominant coordinate among the three coordinates is identified based on the normal vector. Correction values for the other two coordinates are determined based on the first predicted position and actual coordinate values. A second predicted position for the dominant coordinate is calculated by plugging the actual values of the other two coordinates into the plane equation. A final correction value is determined, and the vertex is encoded using the three correction values. This prediction scheme leverages local planarity to improve accuracy and efficiency for irregularly sampled surfaces.

What exactly they claim (claim 1)

1. A method for compressing three-dimensional data comprising: identifying a first vertex as a vertex to be compressed, the first vertex having three coordinates with actual coordinate values; identifying a plurality of neighboring vertices; determining a first predicted position of the first vertex based on positions of the plurality of neighboring vertices, the first predicted position having predicted values for the three coordinates; determining a geometric constraint defined by the plurality of neighboring vertices; identifying a first coordinate of the three coordinates based on the geometric constraint; determining correction values for two coordinates of the three coordinates based on the predicted values of the first predicted position and the actual coordinate values of the first vertex, the two coordinates being different from the first coordinate; determining a correction value for the first coordinate of the three coordinates based on the actual coordinate values of the two coordinates and the geometric constraint; and compressing the first vertex using the correction values for the three coordinates.

Facts

Company
Google (GOOGLE LLC)
Official title
PREDICTION SCHEME FOR MESHES WITH IRREGULAR SURFACE SAMPLING
Publication number
US20260281433A1
Application number
19563577
Filed
Mar 11, 2026
Published
Sep 17, 2026
Inventors
2
Claims
20

Classified under

H04N 19/597 Electricity & electronicsH04N 19/91 Electricity & electronics
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.