How many pixels is the resolution of the human eye equivalent to a camera?

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 your eyes, which are used to feel monochrome contrast and brightness, and play an important role in the clarity of the picture displayed in your eyes. And even if the eye pixel is regarded as 65.438+0.05 billion, it is still underestimated, because it is not a camera after all.

Men and women still have different eyes.

People's eyes constantly grab the surrounding scene, hoping to get a larger visual area than the visual field, and then put these areas together in the brain, just like stitching photos, to get a panoramic view. In the case of good light, as long as the distance between two thin lines is not less than 0.6 radian (0.0 1 degree), our eyes can distinguish it. That is, the equivalent pixel size is 0.3 radians. It is conservatively estimated that the horizontal viewing angle of eyes is 120 degrees and the vertical viewing angle is 60 degrees, which is equivalent to 576 million pixels of image data.

But interestingly, when we print 6x4 "photos, the average person can't tell the difference between 300dpi and 150dpi at ordinary sight distance. So although people's eyes and brain can work together to process a large amount of visual data, the printed output of 150dpi can already provide enough photo quality to satisfy us. It should be pointed out that there are more cone cells in women and more rod cells in men. So girls can always see brighter colors than men, but the light is not good and clear.

Oh, it turns out that foreign researchers are all white. ...