To perform an image arithmetic calculation:

1.  From the softWoRx main menu, click Filter | Image Arithmetic.

2. Enter an image name or window number into the Image 1 field, or click Image 1 and browse to an image file.

3. If desired, repeat Step 2 for the Image 2 field.

4. Define the destination file or window for the calculated result. (The default is Window 1.)

5.  In the Image 1 Wave field, enter the appropriate input wavelength from Image 1.

6. If you are using a second image, enter the appropriate wavelength from Image 2 to use as input into the Image 2 Wave field.

7. In the Operation list, select the appropriate operation.

8. Set the Process Image 1 and Process Image 2 options to enable or disable the processing of the appropriate images.

9. Enable or disable the other options in the dialog box as required for your calculation.

10. Click Do It. The results of the calculation are displayed in the file or window defined in the Results field.