You won’t believe me, but square A is the same value of gray as square B. (Don’t just take Wikipedia’s word for itâverify it yourself by sampling the two squares in Photoshop.)
When we perceive an object to be three-dimensional, our brains automatically account for the lighting conditions, and compensate for nearby color and brightness values.
I’ve been reading a lot about visual perception for class, and this is one of the most interesting images so far.
Thanks to ColourLovers for posting this.