LIDAR Object Recognition Using Contour Reliability for Motion Detection

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Solution Overview

Problem

Existing technologies face challenges in accurately determining whether an object is moving or movable using LIDAR data, which is crucial for ensuring the stability of autonomous driving and reducing the risk of accidents.

Innovation Solution

An apparatus comprising a sensor and a processor that determines contour points within an object box, assesses whether these points meet specific criteria regarding their coordinates and obstruction, and assigns a reliability value to determine if the object is moving or movable based on these factors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If LIDAR data is used to determine object movement, then measurement precision is improved, but reliability is insufficient due to difficulty in accurately determining moving vs. movable objects

Engineering Contradiction:
Improveobject position detection accuracyVSAvoidobject movement classification reliability
Core Design Contradiction:
Measurement precisionVSReliability

Solution Approach 1:

The patent segments the object detection process into multiple independent verification stages: contour point extraction, coordinate range verification, obstruction status checking, and movement state determination. Each stage processes specific features independently and contributes to the overall reliability score, allowing the system to systematically evaluate multiple criteria rather than relying on a single detection mechanism.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent introduces a reliability value parameter that dynamically changes based on multiple verification criteria. The system calculates different reliability scores based on contour point coordinates, obstruction status, and movement characteristics, then uses these parameter variations to determine the final movement state. This transforms the binary classification problem into a multi-parameter evaluation system.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If multiple verification criteria are applied to determine object movement, then reliability is improved, but device complexity increases

Engineering Contradiction:
Improveobject movement classification reliabilityVSAvoidprocessing system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent performs preliminary actions by pre-defining coordinate ranges for different object types and pre-establishing verification criteria before actual object detection. The system prepares contour point extraction methods and obstruction detection algorithms in advance, so that during runtime, it only needs to execute predefined verification steps rather than creating complex decision logic from scratch.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system uses the LIDAR data itself to verify multiple criteria without requiring additional external sensors or complex processing equipment. The same sensor data is reused for contour extraction, coordinate verification, and obstruction detection, allowing the system to perform multiple verification functions using existing resources rather than adding complexity through additional components.

Inventive Principle:
Principle #25Self-service

3Measurement precision

If contour points and coordinate verification are used, then measurement precision is improved, but loss of time increases due to multiple verification steps

Engineering Contradiction:
Improveobject position detection accuracyVSAvoidprocessing time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent implements partial verification by checking only the necessary contour point coordinates rather than processing all detected points. The system verifies whether minimum and maximum first-axis coordinates fall within predefined ranges, performing selective verification on critical points rather than exhaustive checking of all data, thus reducing processing time while maintaining accuracy.

Inventive Principle:
Principle #16Partial or excessive action

Solution Approach 2:

The system pre-defines coordinate ranges and verification thresholds before actual object detection occurs. By preparing acceptance criteria and boundary values in advance, the system avoids complex real-time calculations and can quickly compare detected coordinates against predetermined ranges, significantly reducing processing time during runtime.

Inventive Principle:
Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution effectively enhances the accuracy of determining moving objects, thereby improving the stability of autonomous driving systems and reducing the risk of accidents by providing reliable data on object movement.

Implementation Method 1

A distance from a LIDAR to an object may be obtained through an interval between the time when laser is transmitted by the LIDAR and the time if the laser reflected by the object is received

Methodology Applied
Scientific EffectTime of Flight: Time of Flight

Data Source

PatentUS20250076464A1Apparatus For Recognizing Object And Method Thereof
Publication Date: 2025.03.06 HYUNDAI MOTOR CO LTD
  • US20250076464A1 patent drawing
  • US20250076464A1 patent drawing
  • US20250076464A1 patent drawing

AI summary

An apparatus may comprise a sensor, and a processor configured to determine points identified in a frame associated with an object, determine: whether the object is absent in a first frame before the frame, whether all or part of the points are unobstructed, and whether a moved distance of the object between the frame and a second frame after the frame is greater than a threshold distance, or whether a speed of the object is greater than a threshold speed, assign a reliability value to the object based on at least one of a minimum value of first axis coordinates of the points and a maximum value of first axis coordinates of the points being within the range, or based on at least one of the aforementioned determinations, determine that the object is moving or movable, and output a signal indicating that the object is moving or movable.