What is the face recognition function?

The principle of face detection facial recognition technology doesn't sound profound. It locks the position of the face in the picture by identifying the eye, mouth and other characteristic information in the picture, and automatically takes the face as the subject to set the accurate focal length and exposure. When the face detection and face recognition function starts to work, the camera will be automatically set according to the position and illumination of the face in the picture to ensure the clear and accurate exposure of the face. In addition, when there are many people in the picture, the face detection and face recognition function can also accurately select the most important object.

How to realize face recognition technology

In the past shooting, how to deal with the relationship between people and background has always been a troublesome problem: if the people are not in the middle of the viewfinder, the camera may focus on the distant background, resulting in blurred people; When the brightness difference between people and the background is great, it will lead to underexposure or overexposure of the face. In order to solve these problems, professional digital cameras are equipped with "5 o'clock and 9 o'clock" focusing systems and "surface metering, spot metering and peripheral metering" metering systems, plus "AE/AF locking". Such a complicated setting is a great test for the photographer's experience and finger flexibility. For many digital cameras without these functions, the photographer is completely helpless. The emergence of face recognition technology and face detection technology makes this problem no longer exist. This technology allows the camera to automatically identify whether there is a face in the picture and automatically take the face as the subject. Then, the focus and exposure control of the camera will be adjusted according to the face.

This intelligent function brings two most direct benefits: first, it allows photographers to focus more on framing and achieve a more perfect composition; The second is to improve the shooting speed. For example, Fuji's face detection and face recognition function is realized based on hardware, that is, there is a special integrated circuit in the camera's processing chip for calculation, and each processing time is less than 0.05 seconds, which is much faster than the previous process of "aiming at the subject-half-pressing the shutter-pressing AE/AF to lock-framing" and is more suitable for the demand of snapshot.