graphical annotation based interactive techniques in etrace elearning environment

Graphical Annotation Based Interactive

Techniques in eTrace eLearning Environment

Teodor Ştefănuţ

Computer Science Department

Technical University of Cluj-Napoca

[email protected]

Dorian Gorgan



[email protected]

"eLearning and Software for Education", BUCHAREST, April 17-18, 2008 2

Outline

Objectives

Graphical annotation techniques

Communication improvements using annotations

eTrace platform

Lessons creation and management

Experiments

Knowledge assessment

Gestures

Results

Conclusions


Objectives – I-Trace Project

Study the requirements and specifications for graphical pen annotation based eLearning environments

User requirements (i.e. professor, students), eLearning environment functional specifications, usability requirements, lesson structure, user interaction techniques.

Adapt and integrate graphical annotation capabilities in eTrace eLearning framework

Develop eTrace eLearning environment, design and implement the client-server architecture, resource management, security, annotation model, annotation persistence.

Integrate graphical interaction techniques in teaching materialsDevelop lessons in various domains including Computer Science, Medicine, Physics, Mathematics, Algorithms, Computer Graphics.

Usability evaluation for graphics annotation techniquesDesign and produce evaluation instruments for pen and mouse based graphics annotation; Develop test cases for graphics annotation according with usability requirements and specifications.

Usability measurements, analyse data, usability evaluation.

Usability evaluation for graphics annotation techniquesKnowledge assessment using graphical annotation


Graphics annotation techniques

2D graphical annotation techniques on text, images, and documents

2D graphical annotation techniques for 3D objects

3D graphical annotation techniques on 3D objects

E-learning framework based on 2D and 3D annotation techniques


eTrace Platform

eTrace – eLearning Environment based on graphics annotation

Developed at the Technical University of Cluj-Napoca (UNI-CLUJ)

Developed through the I-TRACE Project

“Interactive Tracing and Graphical Annotation in Pen-based e-learning”,

223434-CP-I-2005-IT-Minerva-M (2005-2007)

ITrace project: http://users.utcluj.ro/~gorgan/res/cgis/itrace/

eTrace references:

eTrace eLearning Environment: http://dataserver.mediogrid.utcluj.ro/adnotare/

eTrace presentation: http://users.utcluj.ro/~gorgan/res/cgis/itrace/


eTrace Platform

Experiment the annotation techniques on 2D and 3D scenes Support annotation independence against document type (text, image), format

and 3D scene description Annotation modeling User interaction techniques Annotation description and communication Synchronization between object and annotation Annotation processing and interpretation Persistence among working sessions and users Visualization Security Integration into e-learning lessons Implementation and experimentation of the annotation techniques in e-learning

applications


eTrace – lessons creation and management

Videos

Documents

3D Objects

Sounds

Other multimediacontent

Pictures


eTrace – Lessons Integration

Login into the system with teachers access rights

Enter the “Add lesson” section

Complete the information for lesson description: Title, section, description, lesson files in .zip format

Send the information to the server

Access the lesson


eTrace – Graphical Annotation Based Lessons


eTrace – Experiments and Exercises

Experiment: multiple elements contour selection

Exercises:

Identify bullets groups Analyze the text above



Experiment: single element selection

Presentation:



Experiment: handwriting

Exercises:

Please indicate the following elements: access and emergency exit doors, flaps, fuselage


eTrace – Knowledge assessment

Visual evaluation Made by the teacher

Based on grades

Can be applied for every annotation

Subjectivity

Time demanding for the teacher

Inefficient and limitative for a high scale e-Learning application


eTrace – Knowledge assessment

Automatic evaluation Automatically made by

the system

Instant evaluations can be implemented

Subjectivity is eliminated

Recommended for global e-Learning systems

Can be done by comparing annotation made by students with a model annotation

Not suitable for all annotation techniques

Automatically verify that redline is inside the yellow contour and as near as possible to the points P1…Pn


Experiments - Exercises

Other exercises (17): http://users.utcluj.ro/~gorgan/res/cgis/itrace/


Measurements


Conclusions

Free forms of expression

New types of questions and answers in the eLearning applications

Visual free form answer provides support for creativity, flexibility, imagination, and artistic ability

Annotation based interaction techniques must be designed according with the characteristics of each interaction device

The assessment of the annotation quality has a significant impact on the quality of the answer

Automatically evaluation of the annotation based answer


Future work

Usability of the 3D annotation techniques

Develop automatically techniques for knowledge assessment in graphics annotation based lessons

Multi user sessions

Real time communication

Develop graphics annotation lessons in various domains

Propose technical specifications for standards concerning with

1. Graphical annotation model

2. User interaction techniques

3. Automatically knowledge evaluation

Questions

Thank you

Teodor Ştefănuţ



[email protected]

Dorian Gorgan



[email protected]

graphical annotation based interactive techniques in etrace elearning environment

Documents

graphical pen annotation

annotation persistence

graphical annotationelearning

usability requirements

usability evaluation

computer graphics

interactive techniques

graphics annotationdeveloped