How many pixels is a normal person's eye equivalent to a camera?

If compared hard, the human eye is roughly equivalent to a camera with a focal length of 50 mm, a variable aperture F4-F324 million pixels, an ISO50-ISO6400 sensitivity and a shutter of 1/24.

The principle of the human eye is the same as that of the camera. The photosensitive device is changed from the photodiode on CCD to the photosensitive battery, and the human eye has 576 million "pixels". There are 5 million cone-shaped cells in the retina of ordinary people. These cone-shaped cells are used to feel the visual color, and the human eye can be imagined as equivalent to 5 million pixels.

However, there are 1 100 million rod-shaped cells in the eyes, which are used to feel monochrome contrast and light and shade, and play an important role in the clarity of the picture displayed by the eyes. Moreover, even if the eye pixel is regarded as 65.438+005 billion, it still underestimates the eye, because the eye is not a camera after all.

Extended data

The human eye behaves more like a camera than a still camera. People's eyes rotate repeatedly, constantly receiving external light signals, and "updating" the image details in the brain at any time. At the same time, the brain can combine different signals obtained by both eyes, which can also increase the resolution of the image. They often turn their eyes or necks to receive more information.

Therefore, the organic combination of eyeball and brain makes the resolution of human eyes not only determined by photoreceptors on iris. According to the above point of view, suppose there is a square view ahead, such as an open window. The pixel value is equivalent to [90 (degree) ×60 (radian/degree) × 1/0. 3] 2 = 324 million, or 324 million pixels. But I didn't realize there were so many pixel values. It's just that the brain gets "useful" details as needed.

On the other hand, the visual range of human eyes is very wide, almost reaching 180 degrees. If this calculation is used, even if it is only calculated at 120 degrees, the pixel can reach 576 million pixels. Such a high pixel value is really beyond the comparison of existing digital cameras.