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Chapter 10 Post-Acquisition Processing Mask Operations 161
Morphological Functions
Input tab page
The Input tab page selects the data to be operated on. The user can specify the data file,
the frames within the file, and the X and Y range on the CCD. The input datatype is
reported. Note that the
Mouse
button at the bottom of the window allows you to use the
mouse to specify the region to be processed. 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. The
Mouse
button is only active when the
Input
tab page is selected.
Parameters tab page
Morphological operations are also accomplished by mask operations, in this case
parameters entered on the Morphological Parameters tab page. There are two basic
morphological mask operations, Erode and Dilate. The effect of the Erode process is to
reduce the size of a white region, while Dilation increases it. The number of iterations is
set by the user. All the options except for Block and User Defined perform the operation
in a specific direction only. Block performs the operation in all directions. Two other
choices are Open and Close. Open is simply a number of erodes (specified by Iterations)
followed by the same number of dilates. Close performs the dilates first, then the erodes.
Figure 140.
Morphological
Input tab page.