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 location identification and function limiting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the dash cam is designed to be easy to attach and detach, then the ease of operation is improved, but the vulnerability to theft increases

Engineering Contradiction:

Improveease of attachment and detachmentVSAvoidanti-theft capability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system performs preliminary actions by capturing images of the vehicle interior before potential theft occurs and storing them as reference data. When the dash cam is removed from the vehicle, the system compares current images with the stored reference images to detect the theft condition, enabling early detection before the thief can dispose of the device.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system establishes a feedback loop where images are continuously captured and compared with reference images. When changes are detected indicating theft (such as removal from the vehicle), the system provides feedback through theft occurrence signals that can trigger alerts, location tracking, and communication with authorities.

Inventive Principle:

Principle #23Feedback

2Measurement precision

If image comparison is performed continuously, then the detection precision of vehicle changes is improved, but the energy consumption increases

Engineering Contradiction:

Improvedetection precision of vehicle changesVSAvoidenergy consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

Instead of continuous comparison, the system performs image comparison periodically or at specific trigger events such as when the vehicle engine is started, when the dash cam is powered on, or at predetermined time intervals. This periodic action maintains detection precision while significantly reducing energy consumption compared to continuous monitoring.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentEP4296126A1Dash cam having Anti-theft function and Anti-theft system for dash cam

Publication Date: 2023.12.27 BG T&A

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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.