SDP 12

Project “PRASER”Senior Design Project Midway Design Review

Team Mosaic

Advisor: Professor Lixin GaoMembers: Allen Chew, Charles Essien, Brian Giang, Simon Ma

Evaluators: Professor Frasier, Professor Gong

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Agenda

Introduction• Recap from PDR• Refined project definition

Project Specification• System block diagram• Subsystem components• Application• Demonstration

Cumulative Design Review • Distribution of tasks• Team responsibility• Internal deadlines

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Reintroduction - Motivation

PowerPoint presentations are dying• Declining in quality• No focus• Non interactive

Hand held laser pointers• Only facilitate basic highlighting

Viewing remote presentations• Bad visual quality• Loss of expression

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Reintroduction - Goals

We want to:Improve presentation experience

• More interactive• More entertaining

Rethink approach to capturing presentations• Bring focus back to the presenter• Facilitate “emotion” for remote presentation

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Design Specification – Project Definition

Praser is …

“A redesigned platform capable of delivering an enhanced presentation experience, both for in

person and remote viewers.”

More interactive utility for presentersBetter experience for viewers with avatars

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Design Specifications –Block Diagram

System Block Diagram

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Application Layers

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Design Specifications – Kinect Subsystem

OpenNI & NITE• Generate “users”• Return interpreted motions and gestures

OpenGL• Real-time image manipulation

OpenNI NITE OpenGL

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Kinect Subsystem - Capabilities

Gesture Recognition• Hand gestures for control• User poses

Tracking• Mapping user position to screen• Location based “selections”

Compositing• Background removal• Image manipulation

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Kinect Subsystem – Avatar Application

Capture presenter in on screen avatar

Walk around and point modes• X, Y coordinates mapped with Kinect

Depth information• Presenter avatar points mapped to

actual points

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Kinect Subsystem – Avatar Application cont’d

Benefits:More expression and emotionBetter interaction with slideshow slidesMore efficient remote viewing of presentation

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Kinect Demonstration

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Design Specifications –Laser Subsystem

Laser subsystem manipulates a laser to create image based on persistence of vision.

Four major components: Galvo, DAC, Laser Pointer, Power Supply

Galvanometer - reflect the laser on x & y axis

Digital to Analog Converter - communication between the computer and galvo

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Laser System Design – Galvanometer

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Laser System Design – Entire System

OpenLase converts ILDA files to sound

Soundcard outputs three different signals:• Right stereo channel

orients X galvo• Left stereo channel

orients Y galvo• Green Laser

Modulation turns on/off the laser

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Correctional Opamp Built a negating opamp circuit to simulate a

differential signal suitable for galvo

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Laser System Design – SmartPoint Application

“Smarter” laser pointer Laser menu and utilities Presenter holds hand up to reveal menu Grab and manipulate elements from slides

• E.g. copy a figure to board

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Laser System Demo

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Problems Addressed

Lasers may be hazardous

We recently purchased safety goggles to prevent any retinal damage and can now work on emitter

Galvos require an differential +/- 5 V input but the soundcard gives a +2.2 V single input.

A correctional circuit is used to produce the correct input to the galvos

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Midway Design Review - Team ResponsibilityAllen Chew (CSE) – Coordinated laser projection system, Software

Development, Researched on how to build correctional amplifier, Researched and ordered parts for project in a timely manner

Charles Essien (CSE) – Software coordinator, Research graphics libraries, Isolated user pixels and overlay onto slides, Compiled sections of MDR report

Brian Giang (EE) – Laser Projection Coordinator, Team Manager,

Coordinated team meetings and set deadlines, Assembled laser projection system and figured signal lines from DAC

Simon Ma (CSE) – Compiled OpenLase Binaries, Ported code over to Ubuntu, Installed and configured JACK to work correctly in Ubuntu.

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Comprehensive Design Review

Final design and start prototyping applications

Computer interfacing with the Kinect

A fully working laser system that will project onto any surface

Using the laser, draw more complex images, text, and animations.

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CDR - Internal deadlines

December - January

•Winter Break• Optimize laser system• Calibrate to ILDA standards• Have Kinect program interact with OpenLase• Develop applications with Kinect input

• CDR – February 6-10

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CDR - Internal deadlines

• CDR – February 6-10