Filter
Top Products
169
Chapter 11
Additional Post-
Acquisition Processing Options
Threshold and Clipping
Introduction
Clipping an image causes pixels outside the specified range to be changed. When
Clip
High
is selected, all pixels with values greater than the Clip High value will be changed
to the Clip High value. When
Clip Low
is selected, all pixels with values less than the
Clip Low value will be changed to the Clip Low value. Selecting
Clip Both
will use
both Clip High and Clip low values during the same processing step.
The
Threshold
function converts an image to binary (black and white). All intensity
values below the threshold setting are zero (black). All those above become ones (white).
Procedure
➧ Select
Clipping/Threshold
from the Process menu.
➧ On the
Input
tab page, if the correct input image does not appear in the Input Image
box, enter the complete file name or search for a file using the browser, accessed by
the button to the right of the text box.
➧ On the
Input
tab page, select the data frame containing the data on which the
operation is to be performed.
Figure 150.
Clipping and
Threshold tab
pages.