Shape Research

How does the visual system recognize objects based on their shape? My research supports the idea that shapes are divided at concavities (indentations) in the contour.

Here, you can see the importance of concavities in a change detection task. We found that shape changes involving concavities are easier to see than those effecting convexities.

Click on one of the demos to see the change type.

Are some changes easier to see than others?