How is the O'Neill camera, teach you how to choose a camera

At present, computer cameras are widely used in video conferencing, or as a network camera to transmit video signals via the Internet or a local area network. Many people use it to capture still images for multimedia display or web design. However, how about the camera? How to choose a camera? Next, Xiaobian will introduce you to everyone:

        The camera is divided into two categories: digital camera and analog camera. The analog camera converts the analog video signal generated by the video capture device into a digital signal and stores it in a computer. The video signal captured by the analog camera must be converted to a digital mode by a specific video capture card and compressed before being converted to a computer. The digital camera captures the image directly and transmits it to the computer via a serial, parallel or USB interface. Nowadays, the cameras in the computer market are mainly digital cameras, and the digital cameras are mainly USB digital cameras using the new data transmission interface. Most of the products currently on the market are such products. In addition to this, there is a product that works with video capture cards, but it is not currently mainstream.

        The camera with USB interface supports true plug and play. Even if you plug in the device while the computer is working, the system will immediately report and find the appropriate driver for it. Moreover, the power used by the USB camera can be directly from The motherboard USB interface is obtained, no longer need a clumsy independent power converter; USB interface provides 12Mbps transmission bandwidth, the transmission speed is much higher than the computer's existing peripheral ports. Compared to the serial port, the USB interface is approximately 100 times faster; compared to the parallel port, the USB interface is nearly 10 times faster. It is not difficult to see from here that the computer camera with USB interface has great advantages in speed.

        How about the O'Neill camera when choosing a camera? The choice of lens is very important. According to the type of photosensitive device, most of the lenses used in cameras on the market today are CCD and CMOS. Among them, CCD (Charge Coupled Device) is a high-end technology group CMOS (Complementary Metal-Oxide Semiconductor) used in imaging and image scanning, and is mostly used in some low-end video products. However, such positioning does not mean that there is a big difference between the two when using a specific camera. In fact, after technical transformation, the gap between the actual effects of CCD and CMOS has been greatly reduced. The manufacturing cost and power consumption of CMOS are lower than that of CCD, so many camera manufacturers use CMOS lenses.

        However, due to its physical characteristics, the imaging quality of CCD and CMOS still have a certain distance. The imaging of the CCD under the same pixel tends to be very good in transparency and sharpness, and the color reproduction and exposure can be basically accurate. The CMOS products are generally transparent, and the color reproduction ability of the real object is weak, and the exposure is not very good. Therefore, we should pay more attention to the skills when using the camera, especially the products using CMOS chips:

        First of all, don't use it in a backlight environment (this CCD is the same), especially not directly pointing to the sun, otherwise the tragedy of "magnifying glass ants" will happen on your camera. 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, and the other is to select products that require minimum illumination. Now some cameras can reach 5 lux (lux is the international unit of illumination, equivalent to one square meter). Such as the blue enchantress's dual-core DV series camera.

        How about O'Neill's camera? How to choose a camera, I believe you have some understanding through the above introduction. The last thing to note is the proper use of the lens zoom. Don't underestimate this. With the correct adjustment, the camera can also shoot the function of the camera chip.