How to make the object move with the camera lens in AE, but the position of the object itself does not move!

2. Press shift to add the object to be tracked;

3. Press the shortcut key P to create the parent-child relationship between the object and the camera.

There are many kinds of cameras and waterproof digital cameras, and the basic principle is the same: converting optical image signals into electrical signals for storage or transmission. When we shoot an object, the light reflected by the object is collected by the camera lens and focused on the light receiving surface of the camera device (such as the target surface of the camera tube), and then the light is converted into electric energy by the camera device, that is, the "video signal" is obtained. The photoelectric signal is very weak, so it needs to be amplified by pre-amplifier circuit and then processed and adjusted by various circuits. The final standard signal can be sent to video recorders and other recording media for recording, or spread through a propagation system, or sent to a monitor for display.

Image decomposition and photoelectric signal conversion device. Image decomposition is the process of decomposing a complete image into several independent pixels (the smallest unit of TV image). Generally speaking, the more pixels, the clearer the image. Each pixel is represented by a single color and brightness. The camera can convert the optical signal of each pixel in the image into a corresponding electrical signal, and then transmit it to the output terminal in a certain order.

main performance

Signal Noise Ratio (SNR)

It is the ratio of video signal level to noise level. This indicator is an important indicator to measure the quality of the camera. The higher the signal-to-noise ratio, the clearer the image and the higher the quality, usually above 50dB.

definition

Professional camera refers to an all-in-one product. DVCAM format is a video and audio storage medium developed by Sony in 1996. Its performance is similar to DV, but the difference is the track width. The track width of DV is 10 micron, while that of DVCAM is 15 micron.