Augmented Reality and 3D modelling

Done by Stafford JoematSupervised by Mr James Connan and Mehrdad Ghaziasgar

PROJECT OVERVIEW Marker-based Augmented Reality uses a camera and a• visual marker, to determine the center of orientation and range of its coordinate system. The system is effectively a driver that allows users to• superimpose a 3D object on a predefined marker, across multiple frames using fixed input video source.

Requirements Analysis

Object Oriented Analysis

Implementation

Testing Issues

Testing Results

User Manual

ITRODUCTION

REQUIREMENTS ANALYSISItems needed

High performance computer

2 mega pixel webcam

AR marker with many good features

OBJECT ORIENTATED ANALYSIS

PERSPECTIVE COMPARISON

1a 2a

4a3a

1b2b

3b4b

x

y

Compares Original markers’ x , y coordinates with Marker with in video input frame

1a + 3a < 1b + 3b &&2a + 4a > 2b + 4b

Rotated to the right

PERSPECTIVE TRANSFORMATIONTransform input Image based on Markers

x,y,z received by perspective comparison.

IMPLEMENTATIONExtract frames

Grayscale

Feature detection

Feature comparison

Stabilized using a running average with selectivity.

IMPLEMENTATIONPerspective

comparison

Perspective transformation

Superimpose image on

extracted frames

Display frames

http://internet.suite101.com/article.cfm/using_printable_augmented_reality_marker_tags

http://technotecture.com/augmentedreality

http://opencv.willowgarage.com/wiki/

http://www.cs.cmu.edu/~cil/vision.html

http://www.adobe.com/devnet/flash/articles/augmented_reality.htmlwww.hotcards.com

REFERENCES