Abstract: The Picture-Wise Just Noticeable Difference (PW-JND) represents the visibility threshold of human vision when viewing distorted images. The PW-JND plays an important role in perceptual image ...

Test your brain with this optical illusion to see if you are sharp enough to find the hidden numbers in the given time limit.

Optical illusions with hidden images are an excellent form of brain food. These visual illusion pictures challenge your ...

Optical illusions have gained a lot of popularity recently, as they get our brain to exercise, and can be the perfect test of ...