Why does the image need to have an image file format? There are several image file formats that are commonly involved in prepress. What are their natures?
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The image file format determines how the file is compatible with various application software and how files exchange data with other files. Since there are many image formats, the format of the image should be determined based on the use of the image. The commonly used image file formats in the design are: TIFF format: TIFF is a tagged image file used to save the image composed of color channels. Its biggest advantage is that the image is not limited by the operating platform, regardless of the PC, MAC or UNIX machines can be used universally. It can save alpha channels and can store separation data in a file, which is the most common image format for printed documents. EPS Format: The EPS format is used for printing and printing. Duotone information can be saved, Alpha channels can be stored, and path and screen information can be stored. GIF is an 8-bit format that can only express 256 colors. It is a common format for network transmission images and usually cannot be used for printing. PSD is mainly used as an intermediate transition of image files to save the channels and layers of images for later modification. The format is very poor, and only Photoshop can use it. There are very few other applications that support it, and it can not be used directly for print output. JPE is not only a file format, but also a compression method. This compression is lossy, and the loss size is not equal, and some are small enough to be discriminated from the human eye and cannot be used directly for print output.