Which photo format is good?

If you still think that the photo processing effect in the past is good, think again: 1995, we have to face hundreds of image file formats, and no two image programs can interoperate. Now we have many file types commonly used in digital cameras, which is very convenient. But for pictures, because the difference is not obvious, it is difficult to choose which file format is the best. However, we still have to carefully evaluate three common digital photo formats. Mainstream JPEG:JPEG format is the default format for digital cameras to save photos, which can be read by every image editor or visualization program. Because you can easily adjust the JPEG compression rate, you can reduce the file size and improve the image quality when moving files. If you are not a professional photographer, you don't care much about the documents you shoot, print and appreciate, and you don't care much about the quality of images, then continue to use JPEG. As long as you set the picture to the lowest compression ratio before shooting, because this represents the highest picture quality. If you need to reduce the image size in the future, you can also compress the image quality, but don't adjust the image quality to the minimum at the beginning. JPEG also has disadvantages. Every time you modify and save a photo, you also reduce the image quality. This process is like photocopying a photocopied image again: in the end, the loss of details will become more and more obvious, even if you keep setting the picture quality to the highest level. (See figure 1) Figure 1 TIFF can save the image quality: the TIFF image compression format is quite commendable because it is almost lossless-no information will be lost during compression. TIFF files are larger than JPEG files, but when you create, edit and save TIFF files, there is no loss of image quality and color change. When dealing with TIFF format, you won't encounter the problem of RAW format when saving photos, and you won't worry about losing color information. To achieve excellent picture quality, please configure your camera to save files in TIFF format, and always keep this format. Or you can set the save format to JPEG on the camera, then go to the PC to prepare for editing, select file > save as, and then select TIFF. When you start in JPEG format, you may lose some image quality, but once the file is saved in TIFF format, the drawing paper will be locked. But it also has weaknesses: TIFF file is much larger than JPEG file, and TIFF format is not as common as JPEG format. If you want to put it on the website by email, you'd better make a JPEG file backup of TIFF pictures. Photography lovers like RAW: If you are very concerned about image quality, then use the camera's RAM mode. There is no loss in RAM, which provides a higher color depth-12 bits of color per pixel, while JPEG and TIFF only provide 8 bits of color depth per pixel. This can display more details of photos, especially in the editing programs Adobe Photoshop and Photoshop Elements. Before setting white balance, sharpening or other special effects, your camera should be set to RAM file format. In this way, the image will not be lost, providing you with more creative space. Unfortunately, each camera manufacturer has its own RAM style, and sometimes different products of the same camera manufacturer have different methods to deal with RAM. For example, Nikon calls its RAW file NEF, while Canon uses CRW and CR2. The original file may require some effort. You must adjust the white balance, adjust the color, and perhaps sharpen the image. If you can't save the changes in the RAW file, you must make two copies of the file-one is the original RAW version, and the other is the JPEG and TIFF file for editing. Try the optional format: PNG is now the default picture file format for Mac screenshots, which can be opened by almost all browsers. And each photo editing program provides its own format. For example, Photoshop's PSD is lossless format, so you can save layers and go back to editing projects when you leave.