Run-length encoding
From Just Solve the File Format Problem
(Difference between revisions)
m (→Links) |
|||
| Line 6: | Line 6: | ||
'''Run-length encoding''' ('''RLE''') is a simple kind of data compression, in which a run of consecutive equal data values is replaced by a code indicating the run length and the data value. | '''Run-length encoding''' ('''RLE''') is a simple kind of data compression, in which a run of consecutive equal data values is replaced by a code indicating the run length and the data value. | ||
| − | RLE can be effective for some types of data, or as part of a more sophisticated algorithm, but by itself it is a poor general purpose compression algorithm. | + | RLE can be effective for some types of data, or as part of a more sophisticated algorithm, but by itself it is a poor general-purpose compression algorithm. |
RLE is used in countless [[Graphics#Raster Graphics Formats|raster graphics]] formats. | RLE is used in countless [[Graphics#Raster Graphics Formats|raster graphics]] formats. | ||
| + | |||
| + | == Related formats == | ||
| + | Algorithms and compressed data formats based primarily on RLE: | ||
| + | * [[NeXT 2-bit RLE]] | ||
| + | * [[PackBits]] | ||
| + | * [[Run-length colour encoding]] | ||
| + | * [[ThunderScan compression]] | ||
| + | |||
| + | Note that most RLE implementations are used in only one format, and are not documented in a separate article. | ||
== Links == | == Links == | ||
* [[Wikipedia:Run-length encoding|Wikipedia article]] | * [[Wikipedia:Run-length encoding|Wikipedia article]] | ||
* [http://www.fileformat.info/mirror/egff/ch09_03.htm Run-Length Encoding (RLE)], from the [[Encyclopedia of Graphics File Formats]] | * [http://www.fileformat.info/mirror/egff/ch09_03.htm Run-Length Encoding (RLE)], from the [[Encyclopedia of Graphics File Formats]] | ||
Revision as of 15:41, 17 March 2016
Run-length encoding (RLE) is a simple kind of data compression, in which a run of consecutive equal data values is replaced by a code indicating the run length and the data value.
RLE can be effective for some types of data, or as part of a more sophisticated algorithm, but by itself it is a poor general-purpose compression algorithm.
RLE is used in countless raster graphics formats.
Related formats
Algorithms and compressed data formats based primarily on RLE:
Note that most RLE implementations are used in only one format, and are not documented in a separate article.
