Conference Room Laser Pointer SystemFinal Design Report

Anna GoncharovaBrent HooverAlex Mendes

Presentation Outline

• Project Concept• Hardware component• Image processing component• Future Work

Project Concept

• “In large conference room presentations when the slides are shown on multiple screens, there is no good solution for pointing a laser at one screen and having it shown on the other(s). This project will use camera(s) to monitor large conference projection screens and look for a laser pointer. When a laser is determined, another laser will be turned on to the other screen and project the pointer to the same spot on the screen.”

General System

Last YearTouch screen used instead

Hardware

• Goal: to direct the secondary laser to the appropriate location and to turn the secondary laser on/off as needed

• Main components: webcam, servo motors, pan and tilt system, relay

Hardware

Webcam LaptopServo motor

controller

Servo motors

Pan and Tilt system

Secondary Laser

Relay

Hardware ComponentsServo motor

Pan and tilt system

Controller

Relay

Software

• Goal: to detect the primary laser and send its (x,y) coordinates to the servo motors

• C++ code and OpenCV (open source image processing library) used

Webcam

•Captures the raw image of the presentation screen

•Transfers the image to the program through USB

Laser Locator

•This algorithm within the Replication Program uses OpenCV functions to find the coordinates of the point

Relay on/off

determination progra

m

•This algorithm determines if the primary laser is on or off, and sends the appropriate command to the relay

Servo motor

controller

•This algorithm sends commands to the servo motor controller to direct the pan and tilt system to the right coordinate location

Testing and Evaluation

• We tested our progress by demonstrations• Our progress could be evaluated by how

accurately and quickly the system worked

Demonstration

Future Work

• Improve system calibration• Improve speed of relay switching while

maintaining resistance to noise• Improve system housing• Improve C++ code to make it more robust