Utah RLE

File Format
Name	Utah RLE
Ontology	Electronic File Formats Graphics Utah RLE
Extension(s)	.rle
Released	≤1987

Utah RLE (or URT RLE, or sometimes just RLE) is a raster image file format associated with the Utah Raster Toolkit software.

Format

A Utah RLE file contains the following entities, in this order. (Not all of them are present in every file.)

• Fixed 15-byte header
• Background color
• Color map
• Comments
• Pixel data

Identification

Files begin with signature bytes 0x52 0xCC.

Specifications

• Design of the Utah RLE format (figure 2-1 and 2-2 are not included)

Software

• Netpbm: rletopnm, pnmtorle (uses a fork of the Utah Raster Toolkit)
• ImageMagick (format named "RLE"; read-only)
• Utah Raster Toolkit source code: GraphicsMagick delegates → urt-*
• Utah Raster Toolkit source code

Sample files

• urt-img.tar
• dexvert samples — image/utahRLE

External links

• Utah Raster Toolkit documentation
• Utah RLE File Format Summary, from the Encyclopedia of Graphics File Formats
• Encyclopedia of graphics file formats