1, the lens
The lens is an important part of the camera, the camera's sensor is generally divided into two kinds of CCD and CMOS. In photography and video, due to the high requirements, so more CCD design, while the camera image requirements are not so high, applied to the lower image of the CMOS has been able to meet the needs.
And CMOS is a big advantage is the manufacturing cost is lower than CCD, power consumption is also much smaller. In addition, you can also pay attention to the size of the lens, the lens is large imaging quality will be better.
2, pixel
Pixel value is an important indicator of the quality of the camera, but also an important indicator of the performance of the camera. Nowadays, the pixel value of mainstream products is generally about 300,000 pixels.
However, it does not mean that the higher the pixel, the more suitable for us to use, because the higher the pixel value of the product, its requirements for the wider the exchange of data, so we also have to choose according to their own network conditions. Generally speaking, 300,000 pixels camera is enough to use.
3, resolution
Resolution is the ability of the camera to analyze and identify the image, and the selection of photographic elements have a great relationship. In practice, the 640x480 standard can already meet our applications, high-resolution products are more expensive. Also, some of the camera logo resolution is the use of software to achieve, and hardware resolution has a certain gap, when buying must pay attention to.
4, focus function
Focus function is also one of the more important indicators of the camera, the general good camera should have a physical focus function, so we can manually adjust the camera's focus, as far as possible to get the clearest image.
5, accompanied by software
Many friends think that the price of brand-name products, not cost-effective, in fact, the price of brand-name products, although more expensive, but its software allows you to maximize the expansion of the scope of application of the camera, so that it is value for money. And brand-name products are not bad performance, so we still recommend that you buy more brand-name products with software to maximize the function of the camera out.
6, price
Price is the most concerned about the purchase of factors, in the current market, 100 to 200 or so cameras have the greatest competitiveness. The core photoreceptor chips are almost all controlled by several major manufacturers, so in this regard we are all standing on the same starting line.
Mostly seen on the market is the photoreceptor chip are COMS, the use of this chip is because of the lower price. And the market business said the CCD, it seems unrealistic. Lens is also an important factor affecting the price, some of the camera lens front lens is plastic, and the better use of the glass lens.
7, appearance
Users of the camera are mostly young Internet users like to chat online, and some of its purpose is to use it and far away friends and relatives to contact the use, so the appearance of the design is also very important, which is why there are so many different shapes on the market for the reason. There are eyes of the modeling, spaceman modeling, camera modeling, can be said to be a variety of forms, a wide range.
8, performance
Camera in the common environment of the shooting quality and transmission speed **** with the decision to use the effect, I would like to mention the line here, the camera performance can not be too bad, we buy is the best in the field to receive the computer to do the next test. At the same time also affected by the pixel factor, high pixel image quality is also high.
Today, the mainstream products on the market camera pixels, most of the 30-35 million pixels, the price is naturally rising. In front of the camera with a rapid swing of the hand left and right, to observe the image displayed is smooth. A good camera should be a clear image, colorful, no drag.
9, installation and use
The camera is connected to the computer through the USB port, which requires the installation of the driver. As long as you follow the instructions, the average user can also do the installation themselves, as long as the manufacturer provides qualified installation instructions. Maintenance, on the other hand, is a long-term problem and can only be upgraded in terms of software since the camera structure is already relatively fixed.
Famous manufacturers are able to provide system upgrades, in addition to upgrading the user through the software driver can also get more technical support. Therefore, I recommend that you buy branded, such as: Logitech, 001, mesh and other famous brands of cameras for users will undoubtedly have a greater appeal. One thing you should remember is that the brand is the guarantee of your purchase.
Expanded information:
1, according to the imaging color division.
(1) color camera: for the scene of fine discrimination, such as identifying the color of clothing or scenery. Because of the color and increase the amount of information, the amount of information is generally considered to be 10 times the black and white camera.
(2) black and white camera: for low light areas and night can not be installed in the area of lighting equipment, in only monitoring the location or movement of the scene, you can choose the resolution is usually higher than the color camera black and white camera.
2, according to the camera resolution.
(1) Image pixels in the 250,000 pixels (pixel) or so, color resolution of 330 lines, black and white resolution of about 400 lines of low-grade type.
(2) Image pixels between 250,000 to 380,000, color resolution of 420 lines, black and white resolution of 500 lines of mid-range type.
(3) Image in more than 380,000 points, color resolution is greater than or equal to 480 lines, black and white resolution, 600 lines above the high resolution.
3, according to the camera sensitivity division.
(1) Ordinary: 1-3 LUX (lux) illumination required for normal operation.
(2) Moonlight type: the illumination required for normal operation is about 0.1 LUX.
(3) Starlight type: the illumination required for normal operation is below 0.01 LUX.
(4) Infrared illumination type: in principle, can be zero illumination, using infrared light source imaging.
4, according to the size of the CCD target surface of the camera element.
(1) 1in target size of 12.7mm wide X 9.6mm high, 16mm diagonal.
(2) 2/3in target size of 8.8mm wide X 6.6mm high, 11mm diagonal.
(3) 1/2in target size of 6.4mm wide X 4.8mm high, 8mm diagonal.
(4) 1/2in target size of 6.4mm wide X 4.8mm high, 8mm diagonal.
(4) 1/3in target size is 4.8mm wide X 3.6mm high, 6mm diagonal.
(5) 1/4in target size is 3.2mm wide X 2.4mm high, 4mm diagonal.
(6) 1/5in is under development, not yet launched the official product.
5, in addition to the CCD camera PAL and NTSC system, can also be divided by image signal processing or by the camera structure. Divided.
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