1. Real-Time Parameterized Avatar Face Generation
Chris Maltzan
Computer Science Adviser: Aaron Cass
Psychology Adviser: Carin Perilloux

2. Imagine You Just Witnessed a Crime
How will you describe the suspect?
Sketch artist
Make a composite yourself

3. Error in Composite Images
Target
Composite
Memory
Drawing
Witness
Sketch Artist
Message
Comprehension

4. Research Question
Can we design an algorithm to assist users in real-time with the design of a composite image?

5. Mental Storage of Physical Appearance
Isabelle Boutet and Avi Chaudhuri. Multistability of overlapped face stimuli is dependent upon orientation.
Perception, 30(6):743 { 753, 2001.

6. A Parameterized Image Editor
Zhou et al. (2010). Parametric reshaping of human bodies in images. ACM Trans. Graph, 29(4). 126:1-126:10.

7. How the Image Editor Works
Zhou et al. (2010). Parametric reshaping of human bodies in images. ACM Trans. Graph, 29(4). 126:1-126:10.

8. EvoFIT: Creating a Composite
Frowd, Hancock, Carson (2004). EvoFIT: A holistic evolutionary facial imaging technique for creating composites. ACM Trans. Appl. Percept, 1(1)

9. EvoFIT: Under the Hood
Frowd, Hancock, Carson (2004). EvoFIT: A holistic evolutionary facial imaging technique for creating composites. ACM Trans. Appl. Percept, 1(1)

10. MakeHuman: A Digital Parameterized System
Pros?
-Digital representation of appearance
-No pictures needed beforehand
Cons?
-Can create really bad images

11. A Wide Range of Possibility

12. The Algorithm

13. Hypothesis
Participants will create composites in less time when using the algorithm.
Participants will require less modifications to complete a composite with the algorithm.
Composites created using the algorithm will be more similar to the target image than composites created without the algorithm.

14. Methods Two Treatments Between-subjects design Creation Phase, n = 16
Judgment Phase, n = 13

15. Creation Phase:
Three consecutive targets:

16. Creation Phase: User Interface

17. Judgment Phase: New sample of participants
Purpose: Are the composites useful (similar)?

18. Modifications by Factor

19. Time by Factor

20. Similarity Score by Factor

21. Time, Modifications, Similarity

22. Judgment Phase - Similarity

23. Composites
Control Experimental

24. Composites
Control Experimental

25. Composites
Control Experimental

26. Discussion Was our hypothesis correct? Speed?
Accuracy/Similarity Rating?

27. Future Work Algorithm Improvement: allowing more variation in symmetry
Selective undo
Compare with sketch artists

28. Questions?
I would like to thank my advisers, Carin Perilloux and Aaron Cass for all of their guidance in this project. I would also like to thank Union College for the Student Research Grant awarded for use in this research.