Basic explanation of Mohr phenomenon

The purpose of digital cameras is to shoot the same scenery as people see. If you can shoot the same picture by pressing the shutter, you can reduce the complexity of adjusting exposure or white balance and focal length. Of course, the photos taken by photographers are completely different from the actual photos, but for ordinary people, the ultimate goal of shooting is to get natural photos, that is, to get photos that users see.

But in fact, the photos taken are very different from the actual pictures. There are many reasons, such as camera defects, lens problems or other factors. The typical distortion phenomenon is the color difference phenomenon that the surface color of the object is purple under outdoor sunlight or the vignetting phenomenon that the edge area of the photo appears dark due to the sawtooth phenomenon of the lens edge.