(Image Source: Wikipedia)
It turns out that there is actually no spiral in the above image. The above image only has concentric circles. The spiral is just an incorrect human perception. This is called the Fraser's Spiral!
"While there is no computer vision system that is as versatile as the human vision system as of today; there are many computer vision systems that are more precise and reliable than the human vision system. In short, for many tasks that require vision the human vision system might be the wrong system to emulate. Furthermore, human visual system is more fallible than we would like to believe." - Dr. Shree K. Nayar
