How about taking pictures with the 8 megapixel camera in front of the phone?

It would be nice to take an 8-megapixel photo. Of course, because the photosensitive elements of mobile phones cannot be compared with professional cameras, the photosensitive elements of digital cameras used in mobile phones are basically CMOS, which is relatively worse than CCD. CCD is a high-end technical element used in photography, while CMOS is used for products with low image quality. Its advantages are lower manufacturing cost and much lower power consumption than CCD, so the effect may be compromised.

Network usage-654.38+0 million to 2 million pixels.

Household-2 million to 5 million pixels.

Publication-over 5 million pixels.

Participate in the film contest-4 million to 5 million pixels.

Printed picture album-over 5 million pixels.

The pixel mentioned by the camera actually refers to the maximum pixel, which is the unit of resolution. This pixel value is only the effective maximum resolution supported by the camera.

300,000 640×480

500,000 800×600

806,5438+0024× 768 5 inches (3.5× 5 inches)

1.3 million 1.280× 960 6 inches (4× 6 inches)

2 million 1600× 12008 inches (6× 8 inches) 5 inches (3.5× 5 inches)

365438+ million 2048×153610 "(8×10 inch) 7" (5× 7 inch)

4.3 million 2400× 1800 12 inch (10× 12 inch) 8 inch (6× 8 inch)

5 million 2560× 1920 12 inch (10× 12 inch) 8 inch (6× 8 inch)

6 million 3,000× 200014 "(114 inch)10" (8×10 inch).

8 million 3264× 248816 "(12×16 inch)10" (8×10 inch).

1 1 4080× 2720 20 inches (16× 20 inches) 12 inches (10× 12 inches).

144,536× 3024 24 inches (18× 24 inches) 14 inches (1 1× 14 inches).

The main parameters of CCD and CMOS are as follows:

1. pixel size

Pixel size refers to the actual physical size of each pixel on the chip pixel array, and the usual sizes are 14um, 10um, 9um, 7um, 6.45um, 3.75um, etc. The pixel size reflects the chip's response to light to some extent. The larger the pixel size, the more photons can be received and the more charges can be generated under the same lighting conditions and exposure time. For low light imaging, pixel size is a representation of chip sensitivity.

2. Sensitivity

Sensitivity is one of the important parameters of the chip, which has two physical meanings. One refers to the photoelectric conversion ability of optical devices, which means the same as responsivity. That is, the sensitivity of the chip refers to the output signal voltage (current) per unit exposure within a certain spectral range, and the unit can be Na 'an/Le Kaessner/Lux, Volt/Watt (V/W), Volt/Lux and Volt/Lumen (V/lm). The other refers to the radiation power (or illuminance) to the ground that the equipment can perceive, which has the same meaning as the detection rate. Units can be expressed in watts (W) or lux.

3. Bad places

Due to the limitation of manufacturing process, it is almost impossible for all pixels of a megapixel sensor to be good. The number of bad pixels refers to the number of bad pixels in the chip (pixels that cannot be imaged effectively or whose corresponding inconsistency is greater than the allowable range of parameters), which is an important parameter to measure the quality of the chip.

4. Spectral sensitivity

Spectral response refers to the chip's response ability to light with different light wavelengths, which is usually given by spectral response curve.