How does the camera focus on the face?

How does the camera focus automatically?

When the camera is aimed at the subject, the camera itself automatically focuses without manual adjustment by the photographer. This is the automatic focusing device (AF). The autofocus device has four working modes, namely infrared or ultrasonic. After the object returns, it is received by the infrared sensor or ultrasonic sensor of the camera, and the distance is measured, and then the focusing device of the camera is driven to focus according to the measured distance. The latter two methods are to measure the distance between the camera and the object based on the triangulation principle by using the rangefinder, and then input the measured distance into the microprocessor in the camera for calculation, and control the focusing motor of the lens to focus according to the calculated distance.

What are the operation steps and methods of camera pre-focusing?

Your topic is a bit big.

Camera operation and shooting are two different things.

If you are asking about the operation of hand-held cameras in different environments. Then follow the following procedure.

1, working mode of handheld camera

Handheld cameras generally refer to business-class cameras (small high definition), and there are two working modes: automatic and manual.

2, fully automatic shooting

You can choose automatic mode, and the white balance, aperture and exposure of the machine are all done automatically. So all you have to do is

Use the zoom function to adjust the scene.

But the picture taken in this way is less effective.

Step 3 shoot by hand

You can also use all manual control parameters.

That is, adjust the aperture, white balance, gray patch and gain to obtain the picture restoration degree.

Suggest according to your situation

1, outdoor parameters can be fully automatic.

Focus should be maintained manually.

2. Use manual aperture when speaking.

3. Party shooting

Focusing and aperture are both manual.

For information about TV cameras, please refer to my Baidu space.

The camera does not have the following focusing functions: face recognition focusing. Facial recognition focusing technology is used in ordinary household digital cameras, but not in high-end cameras. The principle of facial recognition focusing technology is not profound. The camera can identify the facial feature information of people in the picture, such as eyes, mouth and nose, so as to lock the position of people in the picture, and automatically focus and expose the face with the person's face as the focus of shooting. The value of this technology in the domestic digital camera market is enormous. In ordinary household digital cameras, people are the main body of photos.