User guide

Viewing and Editing Images
12-31
If you choose to copy and subtract, you will be asked to enter a new name
and/or version number for the new copy before the operation is performed.
Once this information has been entered, the background subtraction will be
performed.
12.10 Filtering Images
Filtering is a process that removes small noise features on an image while
leaving larger features (like data) relatively unaffected. A wide range of filters
are available for removing different types of noise from images. Depending
on the nature of your data, you will probably need to use only one or two of
the available filters. However, you should experiment with several different
filters before selecting the ones that work best for your images.
The filtering commands are located on the Image menu and toolbar.
Fig. 12-20. Filtering commands.
Note: Since filtering is an irreversible process, you will be asked if you want to
create a copy of the original image before you filter. If you are
experimenting with various filters, you should create copies of your
image and compare them side-by-side. If you filter the original image and
save it, you cannot return to the original, unfiltered state.