People's eyes can see objects because light passes through the lens and then sends signals to the brain through different photoreceptors. The camera captures images through the shutter. The process of capturing an image by a shutter is called exposure, and the time required to capture an image is called exposure time. Shutters are mainly divided into rolling shutter and global shutter.
Exposure speed will also affect the brightness of photos, because the faster the exposure speed, the less light the camera can receive. The photo taken by the shutter is earlier than the one below. The global fast center is different from the rolling shutter. When the shutter is pressed, all pixels of the global shutter start collecting light at the same time. Some places require more rigorous photos, so you can use a global shutter.
Research conclusion
Saving images through film is a method of saving images through chemical reaction. When the light strikes the thin film, the nearby silver ions will be converted into electrically neutral silver atoms. Initially, each silver ion contained some metallic silver. After washing, those uncharged silver ions will carry more metallic silver.
Places that are not dark will become bright after development, and bright places will become dark. This kind of film with reversed light and shade is called negative. At this time, you can get the desired photos by exposing the negative again. Now with the development of technology, cameras will save images in other ways, but the principle is more complicated. The camera captures the image through the shutter, and then saves the image through photochemical reaction or photosensitive material.