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5. Working with PhotoLine

## 5.5 Working With JPEG-Files

### 5.5.1 Basics

The JPEG file format allows to compress images very highly and this was to create small images files. Therefore, it is used widely by digital cameras. But this small image files have the disadvantage that there is a loss of information in the produced images. Usually this loss is nearly invisible. But if a JPEG file is opened and saved repeatedly with different compression factors, the quality of the image decreases significantly. Therefore, the owners of digital cameras appreciate the so-called "lossless editing" of JPEG-files. "lossless" in this case doesn’t mean. that there aren’t any losses, because this is not possible by using JPEG. It rather means that editing the image doesn’t create new losses.