Working with Graphics Formats
Image file formats are developed to serve a specific technical purpose (lossless compression, for example, where the file size is reduced without sacrificing image quality) or to meet a need for a proprietary format for competitive reasons. Many file formats are covered by one or more patents. For example, the GIF format had fallen into disfavor with the open-source crowd because the patent holder waited a while before deciding to enforce his patent rights rather than being upfront with requests for patent royalties.
If you want to view or manipulate an image, you need to identify the file format to choose the proper tool for working with the image. The file’s extension is your first indicator of the file’s format. ...
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