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- PackBits abstract "PackBits is a fast, simple lossless compression scheme for run-length encoding of data.Apple introduced the PackBits format with the release of MacPaint on the Macintosh computer. This compression scheme is one of the types of compression that can be used in TIFF-files. TGA-files also use this RLE compression scheme, but treats data stream as pixels instead of bytes.A PackBits data stream consists of packets with a one-byte header followed by data. The header is a signed byte; the data can be signed, unsigned, or packed (such as MacPaint pixels).In the following table, n is the value of the header byte as a signed integer.Note that interpreting 0 as positive or negative makes no difference in the output. Runs of two bytes adjacent to non-runs are typically written as literal data. It should also be noted that there is no way based on the PackBits data to determine the end of the data stream; that is to say, one must already know the size of the compressed or uncompressed data before reading a PackBits data stream to know where it ends.Apple Computer (see the external link) provides this short example of packed data:FE AA 02 80 00 2A FD AA 03 80 00 2A 22 F7 AAThe following code, written in Microsoft VBA, unpacks the data:".
- PackBits wikiPageExternalLink tn1023.html.
- PackBits wikiPageID "25034".
- PackBits wikiPageRevisionID "555314121".
- PackBits hasPhotoCollection PackBits.
- PackBits subject Category:Lossless_compression_algorithms.
- PackBits type Abstraction100002137.
- PackBits type Act100030358.
- PackBits type Activity100407535.
- PackBits type Algorithm105847438.
- PackBits type Event100029378.
- PackBits type LosslessCompressionAlgorithms.
- PackBits type Procedure101023820.
- PackBits type PsychologicalFeature100023100.
- PackBits type Rule105846932.
- PackBits type YagoPermanentlyLocatedEntity.
- PackBits comment "PackBits is a fast, simple lossless compression scheme for run-length encoding of data.Apple introduced the PackBits format with the release of MacPaint on the Macintosh computer. This compression scheme is one of the types of compression that can be used in TIFF-files. TGA-files also use this RLE compression scheme, but treats data stream as pixels instead of bytes.A PackBits data stream consists of packets with a one-byte header followed by data.".
- PackBits label "PackBits".
- PackBits sameAs m.0685c.
- PackBits sameAs Q7122858.
- PackBits sameAs Q7122858.
- PackBits sameAs PackBits.
- PackBits wasDerivedFrom PackBits?oldid=555314121.
- PackBits isPrimaryTopicOf PackBits.