.SGI File Extension
Silicon Graphics Image
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What is an SGI file?
An SGI file is an image saved in the Silicon Graphics Image (SGI) format. It is typically a color image, shown using three color channels. SGI files contain images that were meant to be shown on Silicon Graphics workstations.
Silicon Graphics Inc., also known as SGI, was a computer and software company that was founded in 1981 and went bankrupt in 2009. SGI developer Paul Haeberli created the SGI image format in 1995.
Many of the workstations Silicon Graphics produced used the SGI format as their native graphics format. Each SGI image can store 8 to 32 bits per pixel. The format also supports run-length encoding (RLE) compression, which reduces each image's file size.
SGI images are also saved as .RGB files. SGI images that include an alpha channel may be saved as .RGBA files.
How to open an SGI file
You can open an SGI file in many image viewers and editors, including File Viewer Plus (Windows), Apple Preview (Mac), XnViewMP (Windows, Mac), and qView (multiplatform).
How to convert an SGI file
Most image viewers and editors that can open SGI files can convert them to other image formats. For example, XnViewMP can convert SGI files to the following formats (and many others):