**Scission demos by Bart Anderson and Jon Winawer**
This site includes 8 images demonstrating lightness illusions based on principles described in these two publications:
- Anderson BL, Winawer J. (2008) Layered image representations and the computation of surface lightness. *Journal of Vision*, 8(7):1-22. doi:10.1167/8.7.18
- Anderson BL, Winawer J. (2005) Image segmentation and lightness perception. *Nature*, 434(7029):79-83. doi:10.1038/nature03271
To use any of these images, please include two citations:
1. For any of the 8 images, cite this OSF site according to the citation instructions on [the front page][1]. For example, APA style: Winawer, J., & Anderson, B. L. (2017, June 14). Scission and Lightness Illusions. Retrieved from osf.io/b34rp
2. For images 1-7 cite reference 2 above (Anderson and Winawer, 2005)
3. For image 8, cite reference 1 above (Anderson and Winawer, 2008).
For details about copyright and usage, see the Creative Commons licence information on [the main page of this site][2].
The 8 images are:
I. A pair of high resolution images showing the chess version of the scission lightness illusion, with and without the background, and a high resolution image of the disc version of the scission lightness illusion, adapted from Figure 1, Anderson and Winawer (2005).
1. [anderson_winawer_hires_chess.tif][3] (2232 × 2027 pixels)
2. [anderson_winawer_hires_chess_no_background.tif][4] (2232 × 2027 pixels)
3. [anderson_winawer_hires_moons.tif][5] (4960 × 2480 pixels)
II. A pair of images showing the chess version of the scission lightness illusion, with and without the background, adapted from Figure 1, Anderson and Winawer (2005).
4. [anderson_winawer_chess.gif][6] (396 × 400 pixels)
5. [anderson_winawer_chess_no_background.gif][7] (396 × 400 pixels)
III. A standard, rotated, and ringed version of the scission lightness illusion, adapted from Figure 1, Anderson and Winawer (2005); Figure 2 Anderson and Winawer (2005); Figure 9, Anderson and Winawer 2008.
6. [anderson_winawer_moons_std.tif][8] (2048 × 1024 pixels)
7. [anderson_winawer_moons_rotated.tif][9] (2048 × 1024 pixels)
8. [anderson_winawer_moons_rings.tif][10] (2048 × 1024 pixels)
The images are copyrighted and may only be reproduced with explicit, written permission from the authors.
**Copyright (c) 2014,2017 Jonathan Winawer and Barton Anderson**
[1]: https://osf.io/b34rp/
[2]: https://osf.io/b34rp/
[3]: https://osf.io/xg3k9/
[4]: https://osf.io/afyrz/
[5]: https://osf.io/e2tyb/
[6]: https://osf.io/fe6gb/
[7]: https://osf.io/29vnu/
[8]: https://osf.io/j9rty/
[9]: https://osf.io/nrwkd/
[10]: https://osf.io/h4x5z/
