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Why is the picture taken by Apple 6 camera reversed?
When you look directly with the front camera, you actually get a mirror, which is the same as what you see when you look in the mirror. The mirror itself is upside down. So when you finish shooting, the system will automatically help you reverse it and get the correct image.

The biggest function of the front camera is the mirror, self-timer and video call. If you tilt your head to the right in the normal photo mode, the picture will tilt to the left, which is not conducive to intuitively adjusting your body position during use. For example, you are video chatting with someone, and now you are found on the left side of the screen, and people will move to the right according to their habits, but if the perspective is positive, the people in the screen will move to the left, which has the opposite effect.

Extended data:

The working principle of the camera is roughly as follows: the optical image of the scene is projected onto the surface of the image sensor through the lens, and then converted into an electrical signal, which passes through A/D? [ 1]? After (analog-to-digital conversion) conversion, it becomes a digital image signal, and then it is sent to a digital signal processing chip (DSP) for processing, and then it is transmitted to a computer for processing through a USB interface, and the image can be seen through a display.

References:

Camera _ Baidu Encyclopedia