What does the clarity of the photo have to do with it?

As far as the digital camera itself is concerned, the imaging effect of photos depends on three aspects:

1, optical performance of the lens;

2. The area and color depth of photosensitive devices;

3. The technical level of the image processor.

The imaging of photos must rely on the pixels on the photoreceptor, but the clarity of photos is not proportional to the height of pixels. In direct proportion to the number of pixels is the size of photo printing. The higher the pixel, the larger the photo size that can be printed. If you only look at it on a computer,100000 pixels and100000 pixels are basically the same, because the display resolution of the display screen is only about 800000 pixels.

Image sharpness refers to the sharpness of every detail shadow and its boundary on the image.

The resolution of the extended data is different from the definition. It does not refer to people's subjective feelings, but refers to the image quality recording indicators used in the process of recording, transmission and display, as well as the inherent screen structure of the display device itself, that is, the scanning format of a single image signal and the pixel specifications of the display device. The scanning format of the image signal and the pixel specification of the display device are both expressed by "horizontal pixels× vertical pixels", and the unit is not "line" but "point".

The resolution of the image signal and the resolution of the display device are determined by the system and specifications, and are fixed, while the definition can be changed according to conditions. The number of lines with sharpness is always smaller than the number of lines connected by pixels with image signal resolution. For example, the scanning format of PAL TV is 720×576, and the horizontal pixels are 720 points, that is, 720 vertical lines can be obtained, but no matter what high-definition display is used, it is impossible to obtain the horizontal definition of 720 TV lines.

Reference: Baidu Encyclopedia-Picture Definition