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Message-ID:  <[log in to unmask]>
Date:         Mon, 11 Aug 2003 14:50:30 -0400
Reply-To:     ImageJ Interest Group <[log in to unmask]>
Sender:       ImageJ Interest Group <[log in to unmask]>
From:         Wayne Rasband <[log in to unmask]>
Subject:      Re: Measure distance
In-Reply-To:  <[log in to unmask]>

> Dear users,
> I have a given shape in an image which I can select with the
> wand tool. I need the x-,y- coordinates of the pixel with the
> largest perpendicular distance to the x-axis. Performing by
> hand is simple but I am looking for an automated process
> because  I have a lot of stacks. I experimented with the the
> macro function getBoundingRect(x, y, width, height) but this
> gives me only the y-coordinate. My mind is blocked, therefore
> I am grateful for any hint.

Here is a macro that finds the x and y coordinates of the pixel inside
the selection with the smallest y coordinate.

-wayne

   macro "FindTopPixel" {
        getSelectionCoordinates(x, y);
        minx =getWidth(); miny =getHeight();
        for (i=0; i<x.length; i++) {
            if (y[i]<miny) {
               minx = x[i];
               miny = y[i];
            }
        }
        print(minx+" "+miny);
   }

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