Re: Measure command

Posted by simon.boyce on May 31, 2006; 10:38pm
URL: http://imagej.273.s1.nabble.com/Measure-command-tp3702627p3702629.html

Great, many thanks. Simon
On May 31, 2006, at 12:38 PM, Wayne Rasband wrote:

>> Is it possible to customize which columns appear in the results  
>> window if you're just measuring the length of a line? I have no  
>> need for mean, min, max or angle. I just want length. I need this  
>> for a project where the result is easily and clearly legible on  
>> the screen.
>
> When measuring lines, you can remove the mean, min and max from the  
> results by unchecking "Mean Gray Value" and "Min & Max Gray Value"  
> in Analyze>Set Measurements. To only record only the length, create  
> a custom "Measure Line" macro
>
>   macro "Measure Line [l]" {
>     if (selectionType!=5)
>         exit("Straight line selection required");
>     getPixelSize(unit, pw, ph);
>     getLine(x1, y1, x2, y2, width);
>     dx=(x2-x1)*pw; dy=(y2-y1)*ph;
>     length = sqrt(dx*dx+dy*dy);
>     setResult("Length", nResults, length);
>     updateResults;
>   }
>
> and add it to StartupMacros.txt. After restarting ImageJ, you will  
> be able to record line lengths by pressing the "l" key.
>
> Or create a macro tool the creates a line selection and measures  
> its length.
>
>  macro "Line Length Tool -C00bL1de0L1ee1" {
>         getPixelSize(unit, pw, ph);
>         getCursorLoc(x, y, z, flags);
>         xstart = x; ystart = y;
>         x2=x; y2=y;
>         while (flags&16!=0) {
>             getCursorLoc(x, y, z, flags);
>             if (x!=x2 || y!=y2)
>                 makeLine(xstart, ystart, x, y);
>             dx=(x-xstart)*pw; dy=(y-ystart)*ph;
>             length = sqrt(dx*dx+dy*dy);
>             showStatus("Length="+length+" "+unit);
>             x2=x; y2=y;
>             wait(10);
>         };
>        setResult("Length", nResults, length);
>        updateResults;
>     }
>
> -wayne
>