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Rapid point cloud alignment and classification with basis set learning

專利號
US11176693B1
公開日期
2021-11-16
申請人
Amazon Technologies, Inc.(US WA Seattle)
發(fā)明人
Javier Romero Gonzalez-Nicolas; Sergey Prokudin; Christoph Lassner
IPC分類
G06T7/50; G06T17/00; G06K9/62
技術領域
cloud,data,point,may,mesh,points,basis,or,e.g,generate
地域: WA WA Seattle

摘要

A system configured to process an input point cloud, which represents an object using unstructured data points, to generate a feature vector that has an ordered structure and a fixed length. The system may process the input point cloud using a basis point set to generate the feature vector. For example, for each basis point in the basis point set, the system may identify a closest data point in the point cloud data and store a distance value or other information associated with the closest data point in the feature vector. The system may process the feature vector using a trained model to generate output data, such as performing point cloud registration to generate mesh data, point cloud classification to generate classification data, and/or the like.

說明書

B=[b1, . . . , bk]T, bicustom characterd, ∥bj∥<=1??[3]

However, the disclosure is not limited thereto and the basis point set may be sampled from a rectangular grid, a ball grid, hexagonal close packing (HCP), and/or other shapes using any technique known to one of skill in the art without departing from the disclosure. Each basis point may be associated with a particular position represented using a three-dimensional coordinate system.

In some examples, the basis point set may be selected from the random uniform ball without further processing, which may be referred to as an unordered basis point set. However, the disclosure is not limited thereto and to improve a performance of a trained model, the system 100 may optionally process the unordered basis point set to introduce a notion of neighborhood or locality, which may be referred to as an ordered basis point set. For example, the system 100 may order the basis points using a k-D tree, such as arranging the points in a k-D tree and sorting them according to leaf indices. As local computations in neural networks over spatially correlated basis points in the feature set benefit from this ordering (e.g., using convolutions or locally connected layers), processing the point cloud data using the ordered basis point set improves a performance of the system 100.

權利要求

1
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