From the composition of the camera hardware to see the quality of a camera:
1. Lens (LENS)
The composition of the lens is a lens structure, which is composed of several lenses, generally a plastic lens or a glass lens. Generally, the lens structures used for cameras are: 1P, 2P, 1G1P, 1G2P, 2G2P, 4G, etc. The more lenses, the higher the cost; glass lenses are more expensive than plastic. Therefore, a good quality camera should use a glass lens, and the imaging effect will be better than that of a plastic lens. In order to reduce costs, most camera products on the market generally use plastic lenses or semi-plastic semi-glass lenses (ie: 1P, 2P, 1G1P, 1G2P, etc.).
2. Image sensor (SENSOR)
Image sensors are divided into two categories: CCD (charge couple device): charge-coupled device
CMOS (complementary metal oxide semiconductor): complementary metal oxide semiconductor
The advantages of CCD are high sensitivity, low noise and large signal-to-noise ratio. However, the production process is complicated, the cost is high, and the power consumption is high.
The advantages of CMOS are high integration, low power consumption (less than 1/3 of CCD), and low cost. However, the noise is relatively large, the sensitivity is low, and the requirements on the light source are high.
At present, among the digital cameras on the market, CCD and CMOS are basically equally divided. In products that use CMOS as the photosensitive component, advanced image control technologies such as automatic gain enhancement technology for image light sources, automatic brightness, white balance control technology, color saturation, contrast, edge enhancement, and gamma correction Achieve the effect comparable to CCD camera.
Restricted by market conditions and market development, there are few manufacturers using CCD image sensors for cameras. The main reason is the high cost of using CCD image sensors.
3. Digital signal processing chip (DSP)
The choice of DSP is based on the camera cost and market acceptance. Now, DSP manufacturers have gradually matured the technology of designing and producing DSPs. The difference in various technical indicators is not very big, but some DSPs need to be further improved in subtle links and drivers.
4. Image resolution / resolution (Resolution):
The image resolution / resolution of the camera is how many pixels we often say. In actual applications, the higher the pixel of the camera, the better the quality of the image captured, but on the other hand, it is not the higher the pixel. Well, for the same screen, the higher the pixel, the better the ability to parse the image, but the amount of data it records will be much larger, so the requirements for storage devices are much higher, so it is appropriate to choose Use current mainstream products.
