#Lossless Compression

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When images are recorded or exported, they can either be stored in a lossless or a lossy file type. With lossless file type compression, the algorithm used to compress data can compress and uncompress data infinitely without anything being lost. Lossy compression, the most popular of which is the extremely common JPEG, degrades the file each time it is saved. If you were to save a JPEG, open it, save it again, and repeat a few times you would see noticeable image deterioration. For this reason, lossless compression is useful when it is expected that a file will be worked with repeatedly. RAW and TIF are file types that use lossless compression, but their downside is that as they are not “throwing away” data, they tend to be larger when all else is equal.