It's an open source program for editing and creating raster images. Compression rates of 10:1 or 20:1 yield little degradation in image quality.In my enthusiasm to share GIMP tips, I forgot to back up and talk about it a bit. Compression rates of 100:1 can be achieved, although the loss is noticeable at that level. JPEG involves a lossy compression mechanism using discrete cosine transform (DCT). JPEG is a joint standard of the International Telecommunications Union (ITU-T T.81) and the International Organization for Standardization (ISO 10918-1). JPG is a graphical file format for editing still images, it offers a symmetrical compression technique which is processor intensive and time consiming in both compression and decompression. The JPG file is a great format as it often manages to compress files to 1/10 of the size of the original file which is especially good for saving on bandwidth. The JPG format is often used in digital camera memory cards. The resultant 'lossy' file means that quality can never be recovered. JPG's are often used for web sites and email as they are generally smaller file sizes as they are lossy meaning that some image quality is lost when the JPG is compressed and saved. More information on the Open Document Format.
OpenDocument format supports document representation: A single XML document and as a collection of several subdocuments within a package. The specifications were originally developed by Sun Microsystems. The standard was developed by the OASIS, and is a free and open format that aims to work with any office suite of products. The OpenDocument Format (ODF) is an XML-based file format for representing electronic documents such as spreadsheets, charts, presentations, drawings and word processing documents. ODG files with the open-source programs Draw and LibreOffice Draw. The purpose of ODG files is to have a free, non-proprietary file type that anyone can use. The OpenDocument vector file specification uses the. ODG image files are associated with OpenOffice OpenDocument (Ver 2) and are Graphics documents.
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