The JPEG compression options are controlled through the Compression tab in the Printing Preferences dialog.

Close any open applications that you are printing from before making changes as not all applications will see your changes until they are re-started.

Changing the compression methods using the following steps is a global change, meaning that all applications will use these options when printing to Raster Image Printer.

Step by Step Instructions

 

1.From the Start menu, go to All Programs - Raster Image Printer 11.0 - Properties...

2.Click the Compression tab in the Printing Preferences dialog.

In the JPEG Image Compression section choose the level of compression to use for Color and Greyscale JPEG images. High Quality will result in a better looking JPEG image but also creates a larger file. A lower quality image will take less disk space to store, but a higher quality image will look better.

3.Click the Apply button and then the OK button to set the changes.

4.Printing to Raster Image Printer from any application to create a JPEG image will now use the compression methods chosen to compress the file.

About JPEG Compression Methods

JPEG compression is set at Medium Quality by default. When changing compression methods, take care to note any Color Reduction settings on the Save tab or any Color set on the Paper/Quality tab as these properties determine the color model of the JPEG image.

 

Low, Medium and High JPEG and the JPEG Quality Factor

When using JPEG compression, a quality setting, or Q factor is often used to determine the  quality and level of compression.

With JPEG compression, which is a lossy compression algorithm, a higher quality factor produces a better image but a larger file. A lower quality factor will produce a smaller file but the image quality can be degraded.

The Q factor used by Raster Image Printer is a range of 1 to 100 with the individual compression levels set at follows:

JPEG Low Quality uses a Q Factor of 30

JPEG Medium Quality uses a Q Factor of 75

JPEG High Quality uses a Q Factor of 85 (100 for grey or indexed compression)

 

Image Color Model

Compression Methods

Used When...

Color Images

Low Quality JPG

Medium Quality JPG

High Quality JPG

Color is chosen on the Paper/Quality tab and

Color Reduction on the Save tab is set to Reduce to optimal and there are more than 256 colors in the document

Color Reduction on the Save tab is set to None

Greyscale Images

Low Quality JPG

Medium Quality JPG

High Quality JPG

Color is chosen on the Paper/Quality tab and

Color Reduction on the Save tab is set to Reduce to optimal and there are only greyscale colors in the document

Color Reduction on the Save tab is set to Reduce to greyscale