Why does taking pictures with a mobile phone selfie camera magnify people's facial shortcomings?

First, the angle problem, the same person feels different from different angles, no one is perfect from any angle, and vice versa. Second, the light problem is generally due to insufficient light, so it is uncomfortable to see. Third, the camera is usually very close to the face, which is convenient for walking with little feet. We know that photos are flat, but people's brains can get three-dimensional information from the plane (no one thinks their photos are just some patterns), which mainly depends on the contrast between light and shadow (light and shade). If you have studied art, you will know how to deal with shadows and make your paintings three-dimensional. Because the camera records an instant light and dark information, which is different from the average light and dark degree we usually feel when looking at people, some people will think that the photos are different from the people we usually see. Therefore, the quality of portrait photography has a great relationship with the brightness of each part. Professional photography textbooks generally explain how to polish exposure to make up for the defects of models, such as using light to make the nose taller and eyes bigger. Amateur photographers often ignore the treatment of these rays because of the limitations of conditions, which will exaggerate the defects of the model and even cause defects that do not exist, so it looks ugly. In addition to the influence of light and shadow, because photography records a moment, the expression, posture, angle and position relative to the lens of the moment can all affect the imaging. The so-called photogenic person is able to maintain a good expression, posture and posture. In fact, only if you master the taboo of photography and train for it, then everyone can "photograph". The mirror only reflects light and hardly causes distortion, so it reflects your true appearance. (Of course, in some cases, it will still cause distortion or the influence of light. ) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _1.Camera position-The face is a complex object, and the perception will become much worse if the angle is slightly changed. This is also the reason why camera manufacturers can't completely break through the smiling face shutter and face recognition system. The beautiful posture you pose in front of the mirror is determined by your eyes, but when you take a selfie, the camera will not be placed at the position of your eyes (laughs), and the position will cause a slightly different angle. Of course, the results are quite different. "2. The field of vision of the lens-the object you see with your eyes is the result of the harmonious integration of two precious cameras that you were born with behind your eyes. That is to say, what you see is a wide and big world, which looks narrow and limited in a general 35mm lens, so you see a flat public face in a sea of people, and you capture it through the lens and emphasize it. 3. The lens effect-generally, the clear range of the lens to see the theme is much shorter than that of the human eye, so the young lady who will take a selfie will make good use of this to strengthen her most beautiful place, such as wearing large and discolored eyes (unless you wear bloodshot lenses and drama scenes that make people feel uncomfortable, this is just from my otaku's point of view). The rest of her slightly rounded face and slightly wider shoulders may be considered superficial.