Impact Factor (2025): 6.9
DOI Prefix: 10.47001/IRJIET
This paper details the design, implementation, and performance evaluation
of a low-cost, real-time Laser-Guided Face Tracking System. The system
successfully integrates computer vision principles with mechatronic actuation
to maintain continuous surveillance on a detected human face. The core
architecture is a split-control model: a host computer executes a Python
application utilizing the OpenCV Haar Cascade classifier for live face
detection and coordinate extraction from a camera feed. These two-dimensional
pixel coordinates are dynamically mapped to angular commands for the actuator.
Communication is handled via a serial protocol that transmits the mapped angles
to an Arduino Uno microcontroller. The Arduino, functioning as the embedded
control unit, generates the necessary Pulse Width Modulation (PWM) signals to
drive two orthogonally mounted servo motors in a pan-tilt configuration. A
low-power laser diode, fixed atop the assembly, visually confirms the tracking
lock. The system achieves a mean steady-state tracking error of less than 5 pixels
and a latency below 150 milliseconds, demonstrating a viable, accessible
solution for applications requiring real-time directional control. This work
validates the synergistic approach of combining high-level vision processing
with simple, effective embedded hardware.
Country : India
IRJIET, Volume 9, Issue 12, December 2025 pp. 78-81