The CCD size of the digital camera is 1 2 3 inches with the most suitable number of pixels

At a certain CCD area, the higher the pixels, the better the effect.

There is a misconception that the higher the pixel of a CCD with the same area, the smaller the area of the individual pixel, so the heavier the noise. This is a plausible fallacy based solely on subjective imagination.

For example, with a 1-inch CCD, one is made into 6 million pixels, and the other is made into 12 million pixels, after shooting, the same 1000*1000 local view is also captured, and the noise of 12 million pixels is indeed heavier.

However, be aware that this is a comparison of the area of 1 6 and 1 12. Such comparisons are unfair.

It should be 1000*1000 parts of 6 million pixels, and 1414*1414 of 12 million pixels should be compared, which is fair.

In fact, if you use software to reduce the ** of 1200 pixels to 6 million pixels, the actual effect will be better than the original 6 million.

This is because, if two pixels are merged, the increase in noise after averaging is canceled out. However, due to the progress of the actual process and the finer object of the noise reduction processing algorithm at high pixels, the image quality of high pixels will be better than that of low pixels.

Conclusion: The "average" noise level of the high pixels is comparable to that of the low pixels, while the resolution is increased. As a result, the image quality is better with high pixels.

Another: The above "Fascination of Her King" is about 07 years, when the mainstream home camera on the market had 8 million pixels, which matched the resolution of the lens.

Now, it's '09.

The current CCD is different from 07. The current lens is also different from 07.

Undoubtedly, of course 1200w is good.

Digital cameras are not only the size of the CCD, but also the quality of the imaging has a lot to do with the software algorithm.

Especially for low-end machines, the software algorithm of 1200W is obviously more advanced than that of 1000W.

Now the software processing CCD photosensitive noise technology has been much more advanced than before, fully capable of 1200W pixels, many high-end DC imaging in the case of sufficient light has been very close to the SLR, this is the credit of software processing.

If you calculate proportionally, the sensitivity of the APSC SLR is about 8 times that of the small DC, but the actual pixel is 8 times If the CCD size of the 135 camera is used as the standard, then the pixel of the small DC should not exceed 200W

Similarly, the photosensitive area is good with low pixels" is definitely a fallacy.

Household machines, I'm talking about household machines, developed to this day, the same CCD area, low phase is good.

A test in 07 years showed that the resolution of the lens of the home machine can support a maximum of 7.1 million pixels. In other words, the image produced by a sensor higher than this aspect element cannot be distinguished by the lens. Since the lens can't be seen, you can imagine how the other phases came from.

That's why the higher the aspher, the harder the noise is to control.

Of course, the size of (1 2) is large, and the sensor size is large. CMOS has low power consumption, and the process has caught up with CCD.

CMOS refers to the manufacturing process of complementary MOS integrated circuits composed of complementary metal oxides (PMOS tubes and NMOS tubes), which is characterized by low power consumption. Since the gate circuit consisting of a pair of MOS in CMOS is either PMOS on, nmOS on, or both instantaneous, it is much more efficient than a linear triode (BJT), so the power consumption is very low.

CCD, English full name: charge-coupled device, Chinese full name: charge coupled element. It can be called a CCD image sensor. A CCD is a semiconductor device that converts optical images into digital signals.

The above information comes from Youdao.

The larger the area, the more light sensitivity, and the larger the size, the higher the resolution in the case of similar process grades.

1. The reading method is two-thirds, a kind of numerical marking. If converted to mm, 2 3 refers to the diagonal of this square. Area, divided by 2 squares, you can get the side length of the square. And the area is the square of the side length, which is the square millimeter.

2. The size of the CCD is actually the area of the photosensitive device. The image sensor is a component used by digital cameras to sensitize imaging, which is equivalent to the film in optical traditional cameras.

3. In fact, the size of the pixel opening area and the fineness of the circuit layout are also one of the key factors affecting the CCD size, that is to say, when the process technology is more precise, the less space the line needs to occupy, and the relative pixel opening area can be fixed, which can be more close, and the purpose of further reducing the area can be achieved (refer to the above diagram: the difference between line density (gap) and . This factor is called the fill factor.

Translated into Chinese"Electronically coupled assemblies"(charged coupled device), it is like the negative of the traditional camera, is the circuit device that induces light, you can imagine it as a tiny induction particle, spread behind the optical lens, when the light and image from the lens through, projected onto the surface of the CCD, the CCD will generate an electric current, the sensed content into digital data storage.

The larger the number of CCD pixels, the larger the size of a single pixel, the more photons captured, the better the photosensitive performance, the lower the signal-to-noise ratio, and the clearer the collected image. Therefore, although the number of CCDs is not the only important criterion for determining image quality, it can still be considered as one of the important criteria for camera rating.

When it comes to the size of the CCD, it is actually the area size of the image sensor, which includes the CCD and CMOS. The larger the area of the CCD CMOS, the more photons are captured, the better the photosensitivity performance, and the lower the signal-to-noise ratio.

CCD CMOS is a component used in digital cameras to sensitize images, which is equivalent to the film in optical conventional cameras. There are four main types of consumer digital cameras on the market: 2 3 inches, 1 inches, 1 inches, and 1 inches.

The larger the CCD CMOS size, the larger the photosensitive area, and the better the imaging effect. A 1-inch 3-megapixel camera is generally better than a 1-inch 4-megapixel camera (the latter has only 55% of the photo-sensitive area); In the same way, for two 5 million pixel cameras, one CCD is 1 inch in size, and the other CCD is 1 inch, and 1 inch is better;

The same is two 1-inch CCDs of the same size, one is made of 4 million pixels, and the other is made of 5 million pixels, so the general 4 million pixel image is better.

It's definitely big. Divide by 1 by the length of the diagonal. The diagonal length of the front, calculated using the Pythagorean theorem. One inch, obviously more than an inch, look at the front, which is bigger? Everyone on earth knows it.

The length and width of the 1-inch sensor are millimeters, and the area is millimeters squared.

The APS-C DSLR sensor has an area of millimeters squared.

The size of the reference sensor will have a lot to do with the quality of the image. Excerpt from the web: "DSLRs use large APS-C format sensors, while some card cameras use 1-inch sensors, and while they may both have 18 million pixels, the difference is that they have different individual pixel widths. Each pixel of the APS-C format, 18-megapixel sensor is about microns wide, while the 1-inch, 18-megapixel sensor is about microns wide.

The wider the individual pixels, the larger the area of each pixel, and in general, the larger the area of the pixel, the more photons it captures, the better the light sensitivity, and the less likely it is to produce noise. The smaller the pixel area, the less information is obtained, and in order to compensate for it, the electrical signal must be increased, which is prone to noise. That's why DSLRs are so much better at shooting at night than card cameras. ”

1 inch is equal to, 1 inch is equivalent to 11mm, of course, the front is larger. The front is the size of the APS, which is generally the sensor size of a (non-full-frame) DSLR camera, and the latter is the sensor size of a regular card camera (or the smaller of these).

1. The reading method is two-thirds, a kind of numerical marking. If converted to mm, 2 3 refers to the diagonal of this square. Area, divided by 2 squares, you can get the side length of the square. And the area is the square of the side length, which is the square millimeter.

2. The size of the CCD is the area size of the photosensitive device. The image sensor is a component used by digital cameras for light-sensitive imaging, which is equivalent to the film in the traditional camera type of optical tremor rental petrology.

3. In fact, the size of the pixel opening area and the fineness of the circuit layout are also one of the key factors affecting the CCD size, that is to say, when the process technology is more precise, the less space the line needs to occupy, and the relative pixel opening area can be fixed, which can be more close, and the purpose of further reducing the area can be achieved (refer to the above diagram: the difference between line density (gap) and . This factor is called the fill factor.