OpenJPEG JPEG 2000 Reader/Writer

FME Format Type Identifier

OpenJPEG

Reader/Writer

Both

Typical File Extensions

.jp2, .j2k, .jpf, .jpx, .jpm, .jp2000, .jp2k, .jpp

JPEG 2000 is a new image coding system that uses state-of-the-art compression techniques based on wavelet technology. JPEG 2000 was designed to overcome the limitations of the original JPEG standard and provide high-quality images at low bit-rates. In addition, JPEG 2000 includes new features and functionalities for client/server imaging applications and resource-constrained wireless devices.

JPEG 2000 has many advantages over JPEG, such as better image quality at the same file size, 25-35% smaller file sizes at comparable image quality, good image quality even at very high compression ratios (over 80:1), low complexity option for devices with limited resources, scalable image files, and progressive rendering and transmission through a layered image file structure.

Coordinate system and georeferencing transformations are read and written via GeoJP2™ (GeoTIFF-in-JPEG2000) and GML-in-JPEG2000.

OpenJPEG is an open-source JPEG 2000 codec (encoder/decoder) made by the Université catholique de Louvain (a university in Belgium) that is used to provide support for reading and writing JPEG 2000 in FME.

OpenJPEG Product and System Requirements

Format

FME Platform

Operating System

Reader/Writer

FME Form

FME Flow

FME Flow Hosted

Windows 64-bit

Linux

Mac

Reader

Yes

Yes

Yes

Yes

Yes

Yes

Writer

Yes

Yes

Yes

Yes

Yes

Yes

Reader Overview

FME considers a single JPEG 2000 file to be a dataset. The JPEG 2000 file contains pixel data. Each pixel in the file is a point in a single FME raster feature.

Writer Overview

FME considers a dataset to be a folder name.

FME Raster Features

FME raster features represent raster data and use several concepts that are unlike those used in the handling of vector data.

For comprehensive information about how FME processes raster data, see Rasters.

JPEG2000 files must be written with square pixel dimensions.

JPEG2000 supports rasters with an arbitrary number of bands, provided all bands are the same data type and no band has a palette.