## image001.jpg

The image is a visual representation of an optical illusion known as the "Checker-shadow illusion." It features a checkerboard pattern with alternating black and white squares on a flat surface. The surface appears to be slightly raised in some areas, creating a three-dimensional effect.

On the right side of the image, there is a green cylinder placed on what looks like a platform or a raised section of the surface. This cylinder casts shadows that interact with the checkerboard pattern, making it appear as though the squares marked "A" and "B" have different shades of gray when they are actually the same.

The text at the bottom left corner of the image credits Edward H. Adelson for this illusion. The text also provides a description stating that the squares labeled A and B are the same shade of gray, despite their appearance in the image due to the shadowing effect created by the cylinder.

This description was generated automatically from image files by a local LLM, and thus, may not be fully accurate. Please feel free to ask questions if you have further questions about the nature of the image or its meaning within the presentation.