Perform either binary or grayscale global thresholding on an image.

The result is an array the same size as the input image. Click here for an example of how thresholding logic is set with this dialog.

A—All values in the image which are greater than or equal to A and less than or equal to B are set to the value of Set True.

B—All values in the image which are greater than or equal to A and less than or equal to B are set to the value of Set True.

A Logic—If set to NE, the logic for the left side of the comparison equation is LT (less than) if Inverse is deselected or GT (greater than) if Inverse is selected. If set to EQ, the logic for the left side of the comparison equation is LE (less than or equal to) if Inverse is deselected or GE (greater than or equal to) if Inverse is selected.

B Logic—If set to NE, the logic for the right side of the comparison equation is LT if Inverse is deselected or GT if Inverse is selected. If set to EQ, the logic for the right side of the comparison equation is LE if Inverse is deselected or GE if Inverse is selected.

Set True—Where the comparison statement is true, output array elements are set to this specified value.

Set False—Where the comparison statement is false, output array elements are set to this specified value. This setting is used only for binary thresholding (when the Binary option is selected).

Binary—If set, binary thresholding is performed; otherwise, grayscale thresholding is performed.

Inverse—If set, the comparison relationships of the image, A, and B are reversed.

Comparison Equation—A status line that displays the comparison relationship between a, the image, and b.

Create New Image—If this option is selected, the processed data is used to create a new image. Enter a suffix for the new image variable name in the text field provided.

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 thresholding and exit the dialog box.

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

Cancel—Dismiss the dialog box without taking any action.

Help—Display online Help on the dialog box.