Region Detection Geometry Prediction Convex Polytopes

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Solution Overview

Problem

Existing region detection techniques for autonomous vehicles, such as bounding boxes and per-pixel labeling, fail to accurately represent complex geometries and are computationally inefficient, leading to inaccurate predictions and high resource consumption.

Innovation Solution

The system uses a neural network to detect regions and predict their geometry as a collection of convex polytopes defined by hyperplanes, reducing computational resources and improving accuracy by avoiding heuristic-based per-pixel labeling and focusing on detected regions only.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If per-pixel labeling is used to represent region geometries, then geometry accuracy is improved, but computational complexity and resource consumption increase significantly

Engineering Contradiction:
Improvegeometry accuracyVSAvoidcomputational complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent segments the region geometry representation into a hierarchical structure: first identifying candidate regions at a coarse level, then refining geometry only for detected regions using convex polytopes. This avoids processing every pixel in the scene, reducing computational complexity while maintaining geometry accuracy for relevant regions.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Instead of performing full per-pixel labeling across the entire scene, the patent applies geometry prediction only to detected candidate regions. This partial action approach focuses computational resources on relevant areas, reducing overall complexity while preserving necessary geometry accuracy for navigation decisions.

Inventive Principle:
Principle #16Partial or excessive action

2Productivity

If bounding boxes are used to represent regions, then computational efficiency is improved, but geometry accuracy deteriorates due to inability to represent complex shapes

Engineering Contradiction:
Improvecomputational efficiencyVSAvoidgeometry accuracy
Core Design Contradiction:
ProductivityVSMeasurement precision

Solution Approach 1:

The patent changes the geometric representation parameters from simple axis-aligned bounding boxes to convex polytopes defined by multiple hyperplanes. This allows representation of complex, rotated, and irregular shapes while maintaining computational efficiency through parametric definitions rather than pixel-level descriptions.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent uses a composite representation combining multiple hyperplanes to form convex polytopes. This composite structure can approximate complex geometries by combining multiple simple planar surfaces, achieving better geometry accuracy than single bounding boxes while remaining computationally tractable.

Inventive Principle:
Principle #40Composite materials

3Ease of manufacture

If heuristics are used for per-pixel labeling, then implementation simplicity is improved, but reliability deteriorates due to invalid heuristics across different scenes

Engineering Contradiction:
Improveimplementation simplicityVSAvoidprediction reliability
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The patent replaces heuristic-based mechanical labeling rules with a learned neural network model. The network learns scene-independent geometric patterns from training data, providing reliable predictions across diverse scenes without requiring hand-crafted heuristics that may fail in novel situations.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The neural network model provides a universal solution that works across different scene types, object categories, and environmental conditions. Unlike scene-specific heuristics, the learned model generalizes to new situations, improving reliability while maintaining implementation simplicity through a single unified approach.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS12154347B2Region detection and geometry prediction
Publication Date: 2024.11.26 WAYMO LLC
  • US12154347B2 patent drawing
  • US12154347B2 patent drawing
  • US12154347B2 patent drawing

AI summary

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for detecting regions of an environment. One of the methods includes receiving a representation of a scene in an environment; processing the representation using a center prediction neural network to generate: (i) features of the scene in the environment, and (ii) a respective center score corresponding to each of a plurality of locations in the environment; selecting, based on the respective center scores, one or more of the plurality of locations; and for each selected location: processing an input comprising the features of the scene in the environment and data specifying the selected location using a geometry prediction neural network to generate a geometry prediction that represents a geometry of the region that is centered at the selected location.