1. Rob van Lier & Mark Vergeer Filling in the afterimage after the image BEST VISUAL ILLUSION CONTEST 2008 This presentation should be viewed in powerpoint Presentation Mode The presentation runs automatically (do not push the arrow buttons on your keyboard) © van Lier & Vergeer

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3. Same image, two different afterimages! © van Lier & Vergeer

4. Same image, two different afterimages! Please, fixate at the black dot.. © van Lier & Vergeer

5. Same image, two different afterimages! © van Lier & Vergeer

6. Same image, two different afterimages! Next: two contours in succession © van Lier & Vergeer

7. Same image, two different afterimages! © van Lier & Vergeer

8. Different afterimage colors at the same retinal location! © van Lier & Vergeer

9. A few more examples.. © van Lier & Vergeer

11. A sequence of contours… © van Lier & Vergeer

13. It also works for surfaces defined by illusory contours.. © van Lier & Vergeer

14. Same image, two different afterimages! Please, fixate at the tiny black dot.. © van Lier & Vergeer

15. Same image, two different afterimages! © van Lier & Vergeer

17. More afterimage filling-in Please fixate at the red dot.. © van Lier & Vergeer

19. Now with a grey patch, covering part of the colored image.. © van Lier & Vergeer

21. Now with an additional oval outline on the grey image (fixate at the red dot) © van Lier & Vergeer

23. Afterimage colors spread and mix between contours © van Lier & Vergeer

25. The end © van Lier & Vergeer