To perform the Acquisition of Samples
Acquiring Samples to analyze:
-
type in
the
Name of the Sample
to be acquired;
-
click
on
Sampling Factor
and
select
a value (from 1 to 10). The Sampling Factor (fa) defines the interval, in
number of pixels, that the pixels in the image will be resampled. If fa=2 that
means for every 2 lines and 2 columns (a 2 x 2 pixel region) one pixel will be
used in the statistics calculations;
-
define
the
Acquisition
mode:
Cursor
or
Coordinates;
-
if
Cursor:
press the
Zoom Cursor
(
) and
click
over some point in the image (upper left point), move the mouse to the right
and below (as if performing a zoom), and
click
again (thus defining the lower right point) to define the area on the image
from which you want to extract the sample;
-
if
Coord.
(Image Coordinates):
type in
the values for the
Sample Coordinates
(line, column). Position (0,0) corresponding to the upper left corner of the
image:
Start: X0 Y0, End : X1 Y1;
-
click
on
Acquire.
Note that a rectangle shows the acquired sample.
The name of the sample define above will be presented in the
Samples
list. The sample coordinates will be used if the acquisition was done by the
cursor. Repeat the procedures above to acquire any other samples.
To delete a sample:
-
select a sample in the
Samples
list;
-
click on the button
Delete
besides the list
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