Thanks Justin
I ended up doing it like this - a long way around perhaps?
----------------------
getSelectionCoordinates(xCoordinates, yCoordinates);
perimeter = 0;
for (p = 0; p < lengthOf(xCoordinates)-1; p++){
if ((xCoordinates[p] == xCoordinates[p+1]) || (yCoordinates[p]
== yCoordinates[p+1])){
perimeter++;
} else {
perimeter = perimeter + sqrt(2);
}
}
if ((xCoordinates[lengthOf(xCoordinates)-1] == xCoordinates[0]) ||
(yCoordinates[lengthOf(xCoordinates)-1] == yCoordinates[0])){
perimeter++;
} else {
perimeter = perimeter + sqrt(2);
}
----------------------
Mike
Justin McGrath wrote:
> The easiest way that I cant think of is this:
> run("Measure");
> x = getResult("Perim.",nResults-1);
>
> You need to have Perimeter selected in Analyze->Set Measurements. If you
> want to set it in your macro, you can use:
> run("Set Measurements...", " perimeter");
>
> Justin
>
> On Mon, Feb 25, 2008 at 11:33 AM, Michael Doube <
[hidden email]>
> wrote:
>
>
>> Hi All
>>
>> I'd like to return the perimeter of a wand selection as a variable in my
>> macro. So far, all I can get is
>>
>> getSelectionCoordinates(xCoordinates, yCoordinates);
>> perimeter = lengthOf(xCoordinates);
>>
>> which is not correct as edge pixels should be counted as sqrt(2).
>>
>> How can I get a similar result to:
>> *getTracedPerimeter()
>>
>> in a macro?
>>
>> Mike*
>>
>>
--
Michael Doube BPhil BVSc PhD MRCVS
Research Associate
Department of Bioengineering
Imperial College London
South Kensington Campus
London SW7 2AZ
United Kingdom
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