|
|
Hello,
The doWand() macro command will outline an object, but where the edge
of the object is horizontal or vertical it includes only the
endpoints. In a sense, the wand reduces the number of outline points
by skipping repeats. For example, in the macro below a square is
drawn. Using the wand, the ROI outline contains 4 points even though
the perimeter includes some 400 pixels. However, by uncommenting the
rotation line in the macro the square is rotated and the outline
contains 555 points (which is fine because of rounding, interpolation
(or not), etc.). In this case, the outline is the representation of
the perimeter pixels. How might I get the coordinates of the all
perimeter points for the unrotated perimeter? Or, more generally, how
might I get all the perimeter points regardless of shape?
Thanks!
Ben Tupper
// begin of macro
newImage("one-rect", "8-bit White", 200, 200, 1);
run("Specify...", "width=100 height=100 x=50 y=50");
run("Draw");
makeRectangle(50, 50, 100, 100);
floodFill(96, 103);
run("Select None");
// Comment the next line to have a square - otherise a diamond is shown
//run("Arbitrarily...", "angle=45 grid=1 interpolation=None fill");
//
setThreshold(0, 254);
run("Convert to Mask");
doWand(39, 98);
getSelectionCoordinates(x,y);
for (i = 0; i < x.length ; i++){
print("i=", i, " x=",x[i], " y=",y[i]);
}
// end of macro
|
Locked
