To Edit the Components of the Mixture Model
This page presents the procedures of the dialog
"Create Mixture Component", used to
define (create/update) the components to be used in the mixture model.
Create/Modify a Mixture Model
Creating the Mixture
Component:
-
Type in the name of the mixture component. Note that the graphic window shows a
plot with zero (0) values for the first component to be defined;
-
in
Spectral Signature:, choose between
Obtain from Image
or
Type
(see following about each option).
Obtaining Values From Image:
-
in case the option was
Obtain
from Image, two lists will be presented with a list of images of the model and the
other with the values of corresponding pixels;
-
In the main window button
Cross Cursor
(
) activate in the SPRING toolbar and click over the image to
show the cross cursor. After activating the cross cursor it suffices to click
over any point on the image in order to acquire its reflectance value. Note
that for each point that you've clicked on the image the graphic window will be
updated to show the effect of the new value while the
Values
list in the
Create Mixture Component
dialog will also be updated.
-
repeat
the last step for every
Band
in the list on the "Create Mixture
Component" dialog.
Type in the Reflectance Values:
-
in case you chose
Type,
choose
the band and
type in
the
Value
for the weight, The user may also choose to
Normalize
the data by
clicking
on
Normalize (0-1).
Do not use commas and yes point.
NOTE: For each normalized and typed value of reflectance or Gray Level,
the graphic window presents the component curve.
-
still in "Create
Mixture Component" you may modify the
Visual Characteristics
of each
Component, so that they will be
presented in different colors and shapes in the graphic window;
-
click on
Color...
to choose one in the
Color Selection
dialog, and
type in
a number (38 maximum) for the symbol
Size.
-
click
on
Apply
to save the mixture component.
Note
that the component is inserted in the list
Components
on the window "Create Mixture
Component".
Repeat
the procedures above to create other components.
-
OBS: Use the button
Delete
to delete a component from the model, or click on
Update...
in order to update a component, repeating the same procedures above;
-
click
on
Save
in the "Create
Mixture Component" window in order to save the model created.
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