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Library 101: Digital Image Basics

Guide to best practices for cataloging images for research projects.

Joint Photographic Expert Group (JPEG)

JPEG stands for "Joint Photographic Expert Group" and has become a standard format for storing images in digital cameras and displaying photographic images on internet web pages. JPEG files are significantly smaller than those saved as TIFF. This comes at a cost, however. JPEG employs lossy compression. Each time you open and close a JPEG image file you lose pixels. A great thing about JPEG files is their flexibility and use in a wide range of web programs. JPEG files achieve a smaller file size by compressing the image in a way that retains detail which matters most, via an algorithm.