JPEG (Joint Photographic Experts Group) Writer Feature Type Parameters

To access feature type parameters, click the gear icon on a feature type in the workspace. This opens the Feature Type Parameter Editor.

Tip  To always display the editor in FME Workbench, you can select View > Windows > Parameter Editor.

General

All feature types share similar General parameters, which may include Feature Type Name, Reader or Writer information, and Geometry.

In most Writer Feature Type parameter dialogs, you can also control Dynamic Schema Definitions. Some database formats accept Table or Index Qualifier prefixes on the output table feature type.

Raster

Metadata Files

Generate World File

World files are used to store georeferencing information for rasters. More specifically, they describe the origin, spacing, and rotation of a raster.

When this parameter is set to Yes, the workspace generates a world file with the same prefix as the output filename, but with the suffix .wld.

World File Extension

This option specifies the file extension of the associated Esri world file.

Generate TAB File

Enables or disables the generation of a TAB file along with the output image.

Write EXIF Tags

Specifies whether to write Exif tags.

Compression

Compression Level

This option sets the desired compression level of the output image. This is expressed as a percentage of the original file size. For example, setting a compression level of 75 means that the output image will be approximately 75% smaller (one-quarter of the size) than an uncompressed image.

Note that this value only represents the targeted compression level, and this may not actually be achieved. JPEG supports both lossy and lossless compression. With lossy compression, the compressed image is an approximation of the original. With lossless compression, the compressed image is identical to the original.

Note  Repeatedly reading and saving files may decrease the quality for this format. In addition, FME Workbench may not know which format data comes from, and whether it used lossy compression. If you know that source data comes from files with lossy compression, you should also set the compression level to 0. Although this compression still does not guarantee the exact copy of the source file, the output will be very close to the original.

Optimize JPEG (reduce file size)

Setting this parameter to Yes optimizes the output image to reduce file size. Optimizing JPEG images does not affect image quality.

Note  This only has an effect when writing 8-bit JPEGs (12-bit JPEGs are always optimized).