Position Estimation Using Vanishing Point Rotation Correction

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Solution Overview

Problem

GPS navigation systems face significant position errors of 10 meters to 100 meters due to limitations in signal accuracy, necessitating additional correction methods for precise localization, especially in dynamic environments like vehicle navigation.

Innovation Solution

A method that determines a first rotation reference point from localization information and map data, and a second rotation reference point from image data, using a vanishing-point detection model, to calculate a rotation parameter for correcting localization information, thereby improving position estimation accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If GPS navigation system is used for position estimation, then position information can be obtained, but position error of 10 meters to 100 meters occurs

Engineering Contradiction:

Improveposition estimation accuracyVSAvoidposition error

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent introduces map data as an intermediary reference system. By determining rotation reference points from both localization information (GPS) and map data, and comparing them with rotation reference points detected from image data (vanishing points), the system creates a mediation layer that corrects GPS position errors through geometric relationships between multiple reference points.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces reliance on purely mechanical/electronic GPS positioning with an optical-geometric system. By using image data from cameras to detect vanishing points and comparing these with map-based reference points, the system substitutes optical measurement and geometric calculation to correct the inherent errors in GPS positioning.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If additional correction methods are introduced to reduce position error, then position accuracy improves, but system complexity increases

Engineering Contradiction:

Improveposition estimation accuracyVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent makes the rotation reference points serve multiple functions: they are used both for determining the vehicle's position and for correcting orientation/rotation information. By determining a first rotation reference point from map data and a second from image data, then using both to calculate rotation parameters, the system achieves multi-functional correction with a unified approach.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system uses the vehicle's own camera and existing map data to perform self-correction of GPS position errors. The localization information and image data from the vehicle's own sensors are processed to generate correction parameters, making the system self-sufficient without requiring external correction infrastructure.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS11651597B2Method and apparatus for estimating position

Publication Date: 2023.05.16 SAMSUNG ELECTRONICS CO LTD

AI summary

A method of estimating a position includes: determining a first rotation reference point based on localization information estimated for a target and map data; estimating a second rotation reference point from image data associated with a front view of the target; and correcting the localization information using a rotation parameter calculated based on the first rotation reference point and the second rotation reference point.