It is true that people gain ten pounds on camera, because people are three-dimensional and three-dimensional, while films (TV screens) and negatives (photos) are flat. Projecting the captured three-dimensional image onto a plane is like growing ten pounds. Being photogenic means that a person looks better than a real person in a photo or video, and vice versa. This difference is caused by the imaging principle of cameras or camcorders.

Because the image collected by the camera through the optical principle is a two-dimensional image, it can not reflect the layering of the object, and because of the influence of light and shooting angle, it is difficult for people to feel the true outline of the object in the photo, which will enlarge some flaws in the photographer's face.