Compression of images is the function of the Online Storage Manager. The manner in which images are effectively stored reduces the use of storage space as well as reducing the traffic on the network.
The compression of the images to be stored can be performed in three ways:
Compressed: Using JPEG / JPEG2000 compression, the user can decide how much loss to introduce and make a trade-off between file size and image quality.
NOTE: This is only available for use in a state and country that allow picture processing using this method. If you select this method, a warning appears that asks you to confirm that you understand the implications of using compressed images.
Lossless Compression: With Lossless Compression it is possible to use JPEG / JPEG2000 / RICE compression. All image information originally in the file remains after the file is uncompressed.
Lossy Compression Factor: Lossy Compression reduces a file by permanently eliminating certain information, especially redundant information. When the file is uncompressed, only part of the original information is still there (although the user may not notice it).
Each Online Storage Manager can be separately defined to store images in a different compression mode. In addition, it is possible to define more detailed policies to choose a particular compression method according to the source AE or even modality. The compression is determined at the time that the image is stored.
NOTE: The Lossy Compression Factor controls the amount of compression. When the value is high, the file is more compressed. When the value is low, the file is less compressed.
To configure Compression Settings:
1. Click Workflow Manager Configuration in the left pane and then select Compression Settings.
2. Click the Default Settings button.
The Compressed Default Settings window appears.
3. Select the desired compression type.
NOTE: If you select Lossy, a warning appears that asks you to confirm that you understand the implications of using compressed images.
4. Click Save to save the changes to the compression setting.
5. To return to the default settings click Restore Defaults settings.
6. Click Close.
The Compression Rules window appears. The existing rules are listed in the window.
7. Click Add to add a new compression rule.
8. Enter the name of the new Rule and click OK.
The Compression Rules window appears.
9. Click Add to add another rule.
10. Select the rule to be added.
The Fill In Values dialog box appears.
11. Enter the rule and click OK.
12. Select the compression type and click OK.
To remove a compression rule:
1. Select the rule and click on Remove.
You are asked to confirm the deletion of the rule.
2. Click Yes to remove the rule.
To edit an existing rule:
1. Select the rule and then click Edit.
2. Follow steps 3 through 12 to change rule parameters as required.
To change the name of a compression rule,
1. Select the rule and then click Rename.
2. Enter the new name and click OK.
The new name appears in the Compression Rules list.