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© Van Lier & Vergeer, 2006 Visual Illusion Contest 2006 Rob van Lier & Mark Vergeer NICI, Radboud University Nijmegen, The Netherlands Catching Patches.

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Presentation on theme: "© Van Lier & Vergeer, 2006 Visual Illusion Contest 2006 Rob van Lier & Mark Vergeer NICI, Radboud University Nijmegen, The Netherlands Catching Patches."— Presentation transcript:

1 © Van Lier & Vergeer, 2006 Visual Illusion Contest 2006 Rob van Lier & Mark Vergeer NICI, Radboud University Nijmegen, The Netherlands Catching Patches

2 © Van Lier & Vergeer, 2006 A fuzzy grid...

3 © Van Lier & Vergeer, 2006 A fuzzy grid. Dark background  no patches

4 © Van Lier & Vergeer, 2006 With luminance edges however...

5 © Van Lier & Vergeer, 2006 A fuzzy grid. Dark background, light edges  dark patches

6 © Van Lier & Vergeer, 2006 A fuzzy grid. Dark background, dark edges  dark patches (weak )

7 © Van Lier & Vergeer, 2006 A fuzzy grid. Light background  no patches

8 © Van Lier & Vergeer, 2006 A fuzzy grid. Light background, dark edges  light patches

9 © Van Lier & Vergeer, 2006 A fuzzy grid. Light background, light edges  light patches (weak)

10 © Van Lier & Vergeer, 2006 Another grid, but now with thicker fuzzy bars...

11 © Van Lier & Vergeer, 2006 A fuzzy grid. Dark background  no patches

12 © Van Lier & Vergeer, 2006 A fuzzy grid. Dark background, light edges  dark patches

13 © Van Lier & Vergeer, 2006 A fuzzy grid. Dark background, dark edges  dark patches (weak )

14 © Van Lier & Vergeer, 2006 A fuzzy grid. Light background  no patches

15 © Van Lier & Vergeer, 2006 A fuzzy grid. Light background, dark edges  light patches

16 © Van Lier & Vergeer, 2006 A fuzzy grid. Light background, light edges  light patches (weak)

17 © Van Lier & Vergeer, 2006 Patches follow random changes of the edges at the crossings...

18 © Van Lier & Vergeer, 2006 Random edges at intersections – 1

19 © Van Lier & Vergeer, 2006 Random edges at intersections – 2

20 © Van Lier & Vergeer, and using a ‘Geier pattern‘...

21 © Van Lier & Vergeer, 2006 A Geier-modified Hermann grid – no patches

22 © Van Lier & Vergeer, 2006 The return of the patches...

23 © Van Lier & Vergeer, catched between the edges!

24 © Van Lier & Vergeer, 2006 The end Thanks!


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