What is the imaging principle of the camera?

The imaging principle of the camera is to use photosensitive elements to convert optical signals into electrical signals. After processing, the inverted image is converted into an upright image for easy observation, and the obtained image is stored in a memory.

Its working process is that the light reflected by the shot scene is transmitted to CCD (or CMOS) through the lens of a digital camera. When the CCD (or CMOS) is exposed, the photodiode is stimulated by light to release charge, which generates the electrical signal of the photosensitive device. The CCD (or CMOS) control chip uses the control signal circuit in the photosensitive device to control the current generated by the photosensitive diode.

Output by the current transmission circuit, CCD (or CMOS) will collect the electrical signals generated by one imaging and output them to the amplifier in a unified way. The amplified and filtered electrical signals will be sent to ADC, which will convert the electrical signals into digital signals, and the image data will be output to DSP for post-processing such as color correction and white balance processing. After the digital signal is formed, MPU will compress the signal and convert it into the image format and resolution supported by digital camera.

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Classification of cameras:

1, SLR camera

Single lens reflex (SLR) is the most popular viewfinder system, which is used by most 35mm cameras. In this system, the unique design of the mirror and prism enables the photographer to directly observe the image passing through the lens from the viewfinder.

2. Miniature single camera

Micro-camera has two meanings: micro-camera, compact, single-lens camera and replaceable single-lens camera. That is to say, this word means that this kind of camera is small in size and its imaging quality is similar to that of SLR. That is to say, micro-camera with SLR performance is called micro-camera.

Although the ordinary card digital camera is fashionable, it is limited by the aperture and lens size, and there are always some beautiful scenery that can't be taken. Professional SLR cameras are too big. Therefore, combining the advantages of the two, the micro-single camera came into being.

3. Card camera

The difference between card camera and other cameras: advantages: stylish appearance, large screen LCD screen, slim body and convenient operation. Disadvantages: the manual function is weak, the large LCD screen consumes a lot of power and the lens performance is poor.

4, telephoto camera

A telephoto digital camera refers to a model with a large optical zoom factor. The larger the optical zoom factor, the farther the scene is photographed. Representative models include Minolta Z series, Panasonic FX series, Fuji S series and Kodak DX series.

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