Shulou(Shulou.com)05/31 Report--

Hello, everyone. Lin Fei has come to answer the above questions. Which is better, cmos or ccd, and which is better, cmos or ccd? many people still don't know. Now let's take a look.

1. The difference between CMOS and CCD photosensitive devices.

2. From the working principle of the two kinds of photosensitive devices, we can see that the advantage of CCD lies in the good imaging quality. However, because the manufacturing process is complex and only a few manufacturers can master it, the manufacturing cost is very high, especially the large CCD is very expensive.

3. At the same resolution, CMOS is cheaper than CCD, but the image quality produced by CMOS is lower than that of CCD. So far, most consumer and high-end digital cameras on the market use CCD as a sensor; CMOS sensors are used as low-end products in some cameras. If any camera manufacturer uses the CCD sensor, the manufacturer will spare no effort to promote it as a selling point, even calling it a "digital camera". First, whether there is a CCD sensor or not has become one of the standards for people to judge the grade of digital cameras.

4. The main advantage of CMOS CCD is to save electricity. Unlike the CCD composed of diodes, the CMOS circuit has almost no static power consumption, only when the circuit is turned on. As a result, the power consumption of the CMOS is only about 1 CCD 3, which helps to improve people's bad impression that the digital camera is an electric tiger. The main problem with CMOS is that when dealing with rapidly changing images, the current changes too frequently, resulting in overheating. If the dark current is well suppressed, it will not be a big problem; if it is not well suppressed, it will be very easy to make noise.

5. In addition, the image data scanning methods of CMOS and CCD are very different. For example, if the resolution is 3 million pixels, the CCD sensor can scan 3 million charges continuously. The scanning method is simple, like passing a bucket from one person to another, and the signal can be amplified only after the last data scan is completed. Each pixel of the CMOS sensor has an amplifier that converts the charge into an electrical signal. Therefore, the CMOS sensor can amplify the signal pixel by pixel, and any invalid transmission operation can be saved by this method, so fast data scanning can be carried out with only a small amount of energy consumption, and the noise is reduced. This is Canon's full charge transfer technology, in pixels.

At the end of this article, I hope it will be helpful to you.

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