Would you like to make this site your homepage? It's fast and easy...
Yes, Please make this my home page!
Subjective Contours
The images physically consist of 3 circles with pie shaped wedges removed and 3 angles
formed from straight lines. When you look at the images, you will likely see one triangle
on top of another. The top triangle typically appears lighter, although the background is
physically uniform. The triangular forms and the apparent lightness of the top triangle in
comparison with the bottom one are subjective. Note that the illusion occurs with both
colored and black/white stimuli. What in your visual system accoun ts for the appearance
of the contours?
The subjective contours also appear when marked color differences segregate the parts
of each image. What does this suggest about color in relation to form processing?
to the Illusion page
