PGX (JPEG 2000)

File Format
Name	PGX (JPEG 2000)
Ontology	Electronic File Formats Graphics PGX (JPEG 2000)
Extension(s)	.pgx

PGX is an uncompressed raster image file format used in JPEG 2000 conformance testing, and said to be used by the "JPEG 2000 Verification Model".

A PGX file stores only a single component, so it is limited to grayscale unless multiple PGX files are combined to make a color image.

Identification

PGX files begin with ASCII characters "PG ML", or "PG LM".

Specifications

• ITU-T Rec. T.803, §B.2.6: Reference components file format

Software

• OpenJPEG (unconfirmed; decoder returns "!! Unrecognized format for infile : FILE.pgx [accept only *.j2k, *.jp2, *.jpc or *.jpt !!"]
• JasPer

Sample files

• https://github.com/uclouvain/openjpeg-data/tree/master/baseline ...