Dash Cam Image Comparison for Anti-Theft Vehicle Change Detection

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Solution Overview

Problem

Dash cams installed in vehicles are vulnerable to theft, especially those that are easy to attach and detach, as they lack effective anti-theft mechanisms.

Innovation Solution

A dash cam with an integrated anti-theft system that includes an image acquisition unit, image storage, image analysis, and a theft signal output unit, which captures and compares images to detect changes in the vehicle's environment, and transmits a theft signal if the vehicle is moved, allowing for function limiting and location identification.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the dash cam is made easy to attach and detach, then the ease of operation is improved, but the reliability against theft deteriorates

Engineering Contradiction:

Improveease of attachment and detachmentVSAvoidtheft resistance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system proactively detects potential theft by comparing images taken at different times to identify vehicle changes, and preemptively outputs theft occurrence signals or limits functions before actual theft can occur, countering the vulnerability created by easy attachment/detachment design

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The system continuously captures images, compares them with reference images, and provides feedback through theft occurrence signals or function limitations when changes are detected, creating a closed-loop anti-theft mechanism that responds to potential theft attempts

Inventive Principle:

Principle #23Feedback

2Measurement precision

If the image analysis unit continuously monitors vehicle changes, then the theft detection capability is improved, but the use of energy increases

Engineering Contradiction:

Improvetheft detection capabilityVSAvoidenergy consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

Instead of continuous monitoring, the system performs periodic image capture and comparison operations, analyzing images at specific intervals or when triggered by events such as ignition on/off, thereby reducing energy consumption while maintaining effective theft detection capability

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system captures reference images in advance when the vehicle is in a known state (ignition on or off), and compares subsequent images against these pre-established references, allowing efficient detection of changes without requiring continuous active monitoring

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12190600B2Dash cam having anti-theft function and anti-theft system for dash cam

Publication Date: 2025.01.07 BG T&A

AI summary

A dash cam having an anti-theft function includes an image acquisition unit configured to capture an image, a housing, in which the image acquisition unit is built in, mounted inside a vehicle so that the image acquisition unit images a space including at least a portion of a part constituting the vehicle, an image storage unit configured to store a first image and a second image captured by the image acquisition unit, an image analysis unit configured to compare the first image with the second image and determine whether the vehicle in which the housing is mounted has been changed, and a theft signal output unit configured to output a preset theft occurrence signal based on a determination that the vehicle has been changed by the image analysis unit.