JPEG (Joint Photographic Experts Group) Reader/Writer

FME Format Type Identifier

JPEG

Reader/Writer

Both

Typical File Extensions

.jpg, .jpeg, .jpe, .jif, .jfif, .jfi

JPEG (Joint Photographic Experts Group) is a standardized image compression mechanism. JPEG is designed for compressing either full-color 3-band (RGB) or grayscale 1-band images. JPEG compression can make a file very small, but it is “lossy,” meaning that image quality is lost when the image is compressed.

JPEG data can be either 8- or 12-bit.

The current version of this format supports reading, writing, but not update in place. There is currently no support for georeferencing information or metadata for JPEG files.

JPEG Product and System Requirements

Format

Product

Operating System

Reader/Writer

FME Desktop License

FME Server

FME Cloud

Windows

Linux

Mac

Reader

Available in FME Professional Edition and higher

Yes

Yes

64-bit: Yes

Yes

Yes

Writer

Available in FME Professional Edition and higher

Yes

Yes

64-bit: Yes

Yes

Yes

Reader Overview

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

Writer Overview

FME considers a writer dataset to be a folder name. The JPEG writer distinguishes duplicate output files by appending numbers to the filenames.

FME Raster Features

FME raster features represent raster data and use several concepts that are unlike those used in the handling of vector data. The topics below describe how FME processes raster data.

About FME Rasters Tiling and Mosaicking
Raster Properties Band Combining and Separating
Band Properties Band and Palette Selection
Palette Properties Raster Processing
Compression Raster versus Vector Features
Pyramiding Raster File Naming
Interleaving World Files
Interpretation and Data Type TAB Files
Palette Resolution  

JPEG files can only be created with square pixel dimensions.

JPEG supports rasters with either a Red8, a Green8, and a Blue8 band, or a single Gray8 band.