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Northern
Eclipse Help Reference |
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This tool is used to outline a box on an image.
The drawn box can be used for measuring (see measure) objects within the box
created, for selecting color threshold values for the selected region (see threshold), cropping the selected region of an image
(see crop),
or cutting an area out of an image (see cut). To
measure objects with this tool, threshold an image and then objects within the
image can be outlined with this tool for measuring. It is also possible to
create many boxes on an image (and/or combine with traced regions) before
measurements are executed. Regions may be removed by selecting Remove all
selections or Remove last
selection.
All objects completely within the outlined box,
those touching the line of the box, or all objects that have a center of
gravity within the box can be measured depending on how the data options have
been set (See Data
Options).
Example: When the Rectangular
Tool has been chosen, move the mouse cursor to the upper left quadrant of an
image, hold down the left mouse button and pull a box toward the lower right
quadrant, encompassing the object (or objects) of interest. Release the mouse
button and a box will be in place on the image.
Threshold the image
and then Measure. At this point all of the selected
objects in the field outlined by the box will be measured and a Data Results
dialog box will come up. In the Data Results menu, click on LOG to DDE to send the data to Excel or
the currently connected program supporting Dynamic Data Exchange (see DDE).
This tool will make measurements (without
thresholding) of all the regions placed on an image, as long as in the Data Options
section, under Object Policies, Objects Partially inside selection are
set to Cut by selection.
Hint: If this function is used as a Visual Basic
routine, Visual C++ routine or macro, the same size box may be applied to new
images repetitively as a mask (or template). Selected regions can be saved as
regions (*.msk files) with the use of the Save current selections option.
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