A testament to how important signal processing is: Despite its 22 different photoreceptors rather than the humans three (four if you count cones), mantis shrimp

A testament to how important signal processing is: Despite its 22 different photoreceptors rather than the humans three (four if you count cones), mantis shrimp can only distinguish a limited number of colors as their brains do not mix the inputs from the different receptors, but rather just go with the strongest one to determine the color of an object. http://www.businessinsider.com/the-mantis-shrimp-color-vision-system-2014-1?IR=T http://www.businessinsider.com/the-mantis-shrimp-color-visio...