What is the face recognition function?

Face recognition specifically refers to computer technology that uses analysis and comparison of facial visual feature information for identity identification. Facial recognition is a popular field of computer technology research. It belongs to biometric identification technology, which uses the biological characteristics of an organism (generally specifically a person) to distinguish individual organisms.

Broadly defined face recognition actually includes a series of related technologies for building a face recognition system, including face image collection, face positioning, face recognition preprocessing, identity Confirmation and identity search, etc.; and face recognition in a narrow sense refers specifically to the technology or system for identity confirmation or identity search through faces.

The principle of Facedetection facial recognition technology does not sound profound. It identifies the eyes, mouth and other feature information in the picture, locks the position of the face in the picture, and automatically uses the face as the subject of the shot. Set accurate focus and exposure. When the Facedetection facial recognition function starts working, the camera will automatically set according to the position and illumination of the face in the picture to ensure that the face is clear and the exposure is accurate. In addition, when there are multiple people in the picture, the Facedetection facial recognition function can also work accurately and select the most important object.

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Implementation method

In previous shootings, how to deal with the relationship between characters and background has always been a troublesome problem: if the character is not in the middle of the viewfinder, the camera will The focus may be on the distant background, causing the person to be blurred; when the brightness difference between the person and the background is large, the face may be underexposed or overexposed. In order to solve these problems, professional digital cameras are equipped with "5-point, 9-point" focusing systems and "area metering, spot metering, bracketing metering" metering systems, as well as "AE/AF lock". Such complex settings are a huge test for the photographer's experience and finger dexterity. For many digital cameras that do not have these functions, the photographer is completely helpless. The emergence of facial recognition technology FaceDetection technology makes this problem no longer exist. This technology allows the camera to automatically identify whether there is a face in the frame and automatically use the face as the subject of the shot. The camera then adjusts both focus and exposure controls to the face.

This intelligent function brings two most direct benefits:

First, it allows photographers to concentrate more on framing, which can achieve a more perfect composition;

The second is to increase the shooting speed.

For example, Fujifilm’s Facedetection facial recognition function is based on hardware, that is, there is a special integrated circuit in the camera’s processing chip to perform calculations. Each processing time is less than 0.05 seconds. Compared with The previous process of "aim at the subject - press the shutter halfway - press the AE/AF lock - frame the view" is much faster and more suitable for capture needs. Users' friends can be identified from photos uploaded to the service

Computer Technology

Computer facial recognition technology replaces the process of entering a password for laptop login. An entertaining security software, it is a gimmick of the manufacturer. When logging in, just take a photo of the laptop camera, and the laptop will automatically log in to the desktop instead of entering a password. (This technology has a lot to do with light intensity) Use Previously, you would be asked to enter your face as a touchpad through the laptop camera. Then each time you log in, the system will compare it with the user's face to see if it is the face touchpad recorded in the computer. If so, it can If you can't get in, you won't be able to get in. If you can't get in with face login, the system will automatically jump to entering the password, which will not affect normal use

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