What is a "raw file" and a "JPEG file"?

Raw is the original image file shot by the mobile phone camera.

The original image file contains data processed from the image sensor of a digital camera, scanner or film scanner. They are so named because they have not been processed, printed or used for editing.

Usually, the original image has a wide color gamut, which can be adjusted accurately, and some simple modifications can be made before conversion, such as TIFF or JPEG file format storage.

JPEG format:

Corresponding to raw is JPEG format, which is a format compressed from RAW. The stored color information is not very detailed, and the post-adjustment range is limited. However, the RAW format needs to be opened with a corresponding camera or professional application, and its compatibility and universality are not as strong as JPEG format.

RAW format is more suitable for experienced photographers who need post-optimization of photos, while JPEG format is more suitable for direct users who don't need post-optimization.