Scientists invented a 500-word electronic frog eye composition from frogs.

Once, my parents and I saw an electronic camera on the way to eat in Zhangmutou. I asked my father, "What's that, Dad?" Dad said, "this is an electronic camera, which is specially used to shoot cars that are speeding and violating traffic regulations." I asked my father anxiously, "Will we be photographed?" Dad replied, "even if you are photographed, it doesn't matter if there is no speeding car."

The car is driving so fast, how can the electronic camera capture the speeding? It turns out that scientists get their inspiration from frogs.

It is found that frogs live by eating flies, mosquitoes, moths and other flying insects. Even a very flexible mosquito, as long as it is within the frog's field of vision, the frog can catch this very flexible mosquito immediately without ten seconds. Are frog's eyes sharp enough to catch these flying insects anyway?

In order to find out this problem, bionic scientists finally discovered the mystery of frog eyes after many experiments and repeated research. It turns out that the frog's eye retina has five kinds of nerve cells. One kind only reacts to color, and the other four kinds react to the characteristics of moving objects, and can transmit the decomposed characteristic signals to the visual center of the brain-the optic tectum. There are four nerve cells on the optic tectum of frog. The first one responds to the contrast of the moving object. Secondly, the convex edge of the target can be extracted; The third only sees the edge around the target; The fourth is only about the change of light and shade of the dark leading edge of the target. These four layers of features are like painting on four transparent papers, and they are stacked together to form a complete image. So frogs can see moving objects clearly, but turn a blind eye to static objects.

According to the principle of frog's eye, scientists made electronic frog's eye, and installed electronic frog's eye on the electronic surveillance camera, so that cars violating traffic regulations can be photographed better. There are also many electronic frog eyes around us. For example, when the plane lands, it will be worn by the pilot of the plane to make the plane land better. There are electronic dogs at the gate of the factory to see if there are thieves. ...

Nature is a dictionary without words, and we need to explore its mystery. Frog is just a page in this dictionary. Let's explore the mysteries of nature together!