Perform the discrete cosine transform on an image.

Transform Direction—Choose between forward and reverse transformation.

Create New Image—If selected, the processed data is used to create a new image. Enter a name for the new image in the DCT Output field.

Overwrite Image—If this option is selected, the current image is overwritten by the processed data.

Variable Suffix—If the Create New Image option is selected, enter a suffix for the new image variable name. This suffix is added to the original variable name.

OK—Perform the transform and exit the dialog box.

Apply—Perform the transform, but do not exit the dialog box.

Cancel—Dismiss the dialog box without taking any action.

Help—Display online Help on the dialog box.