Imaging principle of cameras and video cameras.

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Analysis:

Imaging principle of camera

Traditional camera imaging process:

1. Focus the scene image on the film through the lens.

2. The photosensitizer on the film changes with the light.

3. The changed photosensitive agent on the film is developed and fixed by the developer.

Form an image that is opposite or complementary to the scene.

Digital camera imaging process:

1. The light passing through the lens is focused on CCD or CMOS.

2.CCD or CMOS converts light into electrical signals.

3. Processed by the processor and recorded in the memory of the camera.

4. The image is formed by computer processing and electro-optical conversion of display, or printed by printer.

Specific process:

A digital camera focuses an image on an imaging element CCD/ CMOS through an optical system, converts the photoelectric signal of each pixel into a digital signal through an A/D converter, and then processes it into a digital image through a DSP and stores it in a storage medium.

The light enters the camera from the lens, and the CCD performs color filtering and light sensing (photoelectric conversion) to "decompose" the photographed object into pixels according to a certain arrangement. These pixels are transmitted to the "analog-to-digital converter" in the form of analog image signals, converted into digital signals, transmitted to the image processor, processed into real images, and then compressed and stored in the storage medium.

One: the reflected light of the scene is converged through the lens to form a latent image on the film, which is the result of the chemical reaction between the light and the emulsion on the film. After development and fixing, an image is formed. The principle of digital camera imaging is different from that of film imaging. It images on a CCD through a lens, and the CCD photoelectrically converts to generate a video signal, and then generates an image through the photoelectric conversion of a display screen.