Common Problem

Now DV has basically reached the full HD (that is, 1080p) video recording standard. If there are 720p or non-HD DV products, they are basically old products. In addition, the current highest standard for high-definition video is 1080p, and full-HD DV is unlikely to be outdated for a long time. Full-HD DV also agrees to shoot 720p and 1080i videos, so it is recommended to choose full-HD DV when purchasing.

Regarding the effective pixels of DV, whether it is advertised as 10 million or 8 million, these figures are for static images and will not improve the quality of dynamic video. So how many pixels are enough for a full HD camera?

Very simple algorithm, full HD 1080p pixels are 1920*1080 (approximately equal to 2.07 million), that is to say, DV with 2.07 million dynamic effective pixels can completely shoot full HD video. At present, 2.07 million pixels have been recognized by most users. For full HD home DV, this pixel is enough.
Determine purchasing needs and choose home digital cameras with different characteristics

As the saying goes, only buy what is right, not what is expensive. In fact, whether it is cheap or expensive, cost performance is king. The key is whether it is suitable for you. After the CCD, CMOS, lens, zoom, anti-shake, etc. of the products have been gradually upgraded, major brands have also injected various functions into the products, such as projection, graffiti, stamps, and WiFi sharing, etc. These functions have indeed played a big role in finishing. use.

However, it still needs to be selected according to the actual needs of individuals. Compared with these auxiliary functions, the configuration of the product is more important. Therefore, before purchasing, first locate the needs, know which type is suitable for you, and then use the above learning to refer to the selection within this range.

The use of home digital cameras is not only important for the shooting performance of the product itself, but also the user needs to master the shooting skills. Otherwise, even high-end products may not be able to make good use of their excellent shooting performance. Know your needs before you start, recognize the flickering of merchants, and resist your own impulses. Don’t blindly follow the trend, it is the smartest buy. Family.

What are the functions of the wifi camera? The image sensor has two modes: CMOS and CCD. CMOS is a complementary metal oxide semiconductor. CMOS is mainly a semiconductor made of two elements, silicon and germanium, and realizes basic functions through negatively charged and positively charged transistors on CMOS. The currents generated by these two complementary effects can be recorded and interpreted as images by the processing chip. The main advantage of CMOS over CCD is that it is very power-saving. Unlike CCD and CMOS circuits composed of diodes, there is almost no static power consumption. This makes the power consumption of CMOS only about 1/3 of that of ordinary CCD. The important problem of CMOS is that when dealing with fast-changing images, it will overheat due to too frequent current changes. If the dark current is suppressed well, it is not a big problem.

The CCD image sensor is composed of two-dimensional photodiodes arranged on a single crystal silicon substrate and their transmission circuits. The photodiode converts light into electric charge, which is then transmitted and output through the conversion circuit.

Typically, devices that deliver excellent image quality use CCD image sensors, while products that focus on power consumption and cost choose CMOS image sensors. But new technologies are overcoming the inherent weaknesses of each device, while retaining certain properties that are suitable for specific uses. This part is the same as the analog camera. The sound sensor is a pickup or a microphone, which works the same way as a traditional microphone.

What are the characteristics of infrared cameras? Infrared cameras have outstanding advantages such as long night vision distance, strong concealment, and stable performance in surveillance cameras, so It occupies most of the market in night vision surveillance.

In the security TV monitoring system, with the improvement of people's awareness of prevention, the need for 24-hour continuous monitoring of TV monitoring in important places and the maturity of infrared imaging technology, the utilization rate of infrared integrated cameras is getting higher and higher, and it has gradually developed into a This trend is not only used in important departments such as banks, treasuries, museums, archives, library libraries, prisons, etc., but also in general TV monitoring projects such as residential quarters.