1, the lens (LENS)
The composition of the lens is a lens structure, consisting of several pieces of lens, generally plastic lens (plastic) or glass lens (glass). Usually the camera with the lens structure: 1P, 2P, 1G1P, 1G2P, 2G2P, 4G and so on. The more lenses, the higher the cost; glass lenses are more expensive than plastic. Therefore a good quality camera should be used glass lens, the imaging effect is relatively plastic lens will be good. Most of the camera products on the market now in order to reduce costs, generally use plastic lenses or half-plastic half-glass lenses (i.e.: 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
CMOS (complementary metal oxide semiconductor): complementary metal oxide semiconductor
CCD (charge couple device): CCD (charge couple device): complementary metal oxide semiconductor <
The advantages of CCD are high sensitivity, low noise, and large signal-to-noise ratio. But the production process is complex, high cost, high power consumption.
CMOS has the advantages of high integration, low power consumption (less than 1/3 of CCD), low cost. But the noise is relatively large, lower sensitivity, high requirements for the light source.
In the same pixel CCD imaging tends to transparency, sharpness are very good, color reproduction, exposure can ensure basic accuracy. CMOS products tend to be generally transparent, weak color reproduction of physical objects, the exposure is not good. So we use the camera, especially with CMOS chip products should pay more attention to the skills:
First of all, do not use in the backlight environment (this point with the CCD), especially do not point directly to the sun, or else "magnifying glass burning ants," the tragedy of the camera will happen to you.
Secondly, the ambient light should not be too weak, otherwise it will directly affect the image quality. There are two ways to overcome this difficulty, one is to strengthen the surrounding brightness, the second is to choose the minimum required illumination of small products, now some cameras can reach 5lux. lastly, we should pay attention to the reasonable use of lens zoom, do not underestimate this, through the correct adjustment, the camera can also have the same function of shooting chip.
Currently, the market sale of digital cameras, basically CCD and CMOS is equally divided. In the use of CMOS for light-sensitive components of the product, through the use of image light source automatic gain reinforcement technology, automatic brightness, white balance control technology, color saturation, contrast, edge enhancement and gamma correction and other advanced image control technology, can be fully comparable to the effect of CCD camera.
By the market situation and market development and other circumstances, the camera using CCD image sensor manufacturers are few, mainly due to the impact of the high cost of using CCD image sensor.
3, digital signal processing chip (DSP)
In the choice of DSP, is based on the cost of the camera, market acceptance to determine. Now DSP manufacturers in the design and production of DSP technology has gradually matured, in the various technical indicators of the difference is not very large, only some DSP in the subtle aspects and drivers to be further improved.
4, image resolution / resolution (Resolution):
Camera image resolution / resolution is how many pixels of the camera we often say, in practice, the higher the pixel of the camera, the better the quality of the images captured, but on the other hand is not the higher the better the pixel, for the same picture, the higher the pixel of the product, it is also the ability to resolve the image. For the same picture, the higher the pixel, the stronger the ability to analyze the image, but relatively it will record a much larger amount of data, so the requirements of the storage device is also much higher, and thus in the selection of the current mainstream products. Due to the price of the camera, computer hardware, imaging effect and other factors, the camera on the market now basically in the 30 megapixel grade for sale.
There is also due to the CMOS imaging effect in the high pixel is not ideal, so ruling the high pixel camera market is still CCD camera.
One point worth noting: some of the resolution