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Chapter 15 Menus and Dialog Boxes 315
Parameters tab page (Threshold and Clipping)
The Parameters tab page allows you to control the Clipping and Threshold functions.
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).
Control Buttons:
Mouse:
Allows you to specify a region to be processed using the mouse. Simply
drag a box in the data region of the active window and then click on
Mouse
.
The
Frame
and
Range
parameters will assume the values of the defined
region. Note that the
Mouse
button is only active when the
Input
tab page is
selected.
Process:
Initiates the process selected via the Parameters tab page. The selected
process is performed on the data specified on the Input tab page and saved using
the file name and data type specified on the Output tab page.
Close:
Closes the window with no action taken.
Help:
Opens context-sensitive help for the active tab page.
Figure 274.
Threshold and
Clipping
Parameters tab
page.