Suspicious Person Detection Using Eye and Face Direction with Environment Information
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Solution Overview
Problem
Existing technologies for detecting suspicious individuals from images rely solely on face direction and eye direction, leading to erroneous detections due to the lack of consideration for the environment, resulting in inaccurate identification of normal or abnormal behavior.
Innovation Solution
A system that includes an eye direction detection unit, a face direction detection unit, and an environment information acquisition unit, which together determine whether a subject is exhibiting suspicious behavior by analyzing the arrangement of objects around the subject in addition to their gaze and facial orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If suspicious behavior detection is based only on face direction and eye direction, then the detection process is simple, but the detection accuracy is low due to erroneous detection
Solution Approach 1:
The patent transitions from two-dimensional detection (face direction and eye direction only) to three-dimensional detection by adding environment information as a new dimension. This allows the system to consider the spatial relationship between the person, their gaze direction, and surrounding objects, thereby improving detection accuracy without significantly increasing system complexity
Solution Approach 2:
The patent introduces environment information as an intermediary element that mediates between the person's behavior and the detection system. By detecting objects in the environment and analyzing their spatial relationships with the person and gaze direction, the system can more accurately determine whether behavior is suspicious or normal, reducing erroneous detection
2Measurement precision
If environment information is added to improve detection accuracy, then false detection is reduced, but the system complexity increases
Solution Approach 1:
The patent makes the detection system multi-functional by enabling it to perform both traditional face/eye direction detection and environment-based detection. The same detection device processes multiple types of information (face direction, eye direction, and environment information) simultaneously, improving accuracy without requiring separate dedicated systems for each function
Solution Approach 2:
The patent performs preliminary detection of environment information, objects, and their spatial relationships before making the final suspicious behavior determination. By pre-processing and storing environment data, the system reduces the computational burden during real-time detection, thereby improving accuracy without proportionally increasing system complexity
Data Source
AI summary
The present invention provides a technology that can reduce erroneous detection and detect a suspicious person from an image at high accuracy. A suspicious person detection device according to one example embodiment of the present invention includes: an eye direction detection unit that detects an eye direction of a subject; a face direction detection unit that detects a face direction of the subject; an environment information acquisition unit that acquires environment information indicating arrangement of an object around the subject; and a determination unit that, based on the face direction, the eye direction, and the environment information, determines whether or not the subject is showing suspicious behavior.