Why does someone shine when I take photos with a Samsung camera?

You are talking about the so-called "red eye" phenomenon in photography. It is not uncommon to have "red eye" when taking portrait photos with flash, especially when we shoot indoors or in some dim environment. The reason for this problem is that people stay in the dark for a long time, and their pupils will be dilated to meet the needs of vision. At this time, if the position of the flash is as high as people's eyes, the subject is facing the camera, and the pupil is in a straight line with the lamp, then when the strong light of the flash shines on the eyes, it will directly hit the retina, and its red reflected light (of course, it may also be other colors) is likely to enter the shooting angle of the camera. Therefore, how to prevent the reflected light from the retina from entering the lens has become the main way to reduce red eye. In camera technology, there is a kind of pre-flash, that is, before the formal flash shooting, the eyes are illuminated to make their pupils contract, thus reducing the occurrence of red eye. It is important to note that the preview sometimes makes the photographer blink and wander. Here are some ways to prevent red eye. 1. Don't let the subject stay in the dark for a long time. Generally, you can try to turn on the lighting indoors. If there is no bright light source in the environment, try to let the subject's eyes experience the stimulation of strong light for a short time before re-shooting. 2. Adjust the illumination angle of the flash properly, whether it is high or low, whether it is oblique or oblique, and be careful not to let the light be on the same level with the eyes of the subject. 3. When using the built-in flash that can't change direction, you can turn the subject's face away from the camera. Or the eyes of the subject look up or down, it can also eliminate the disadvantages of "red eye". 4. The photographer can turn on the red-eye prevention mode function of the camera to further alleviate the red-eye phenomenon. There is an eye-shaped flash mode in digital cameras, which is the red-eye prevention mode.