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Message-ID:  <[log in to unmask]>
Date:         Wed, 14 Jul 2004 17:49:09 -0400
Reply-To:     ImageJ Interest Group <[log in to unmask]>
Sender:       ImageJ Interest Group <[log in to unmask]>
From:         Michael Cammer <[log in to unmask]>
Subject:      Re: Freehand coordinates

Mostly, this is true.

This does not hold true for stretches of freehand selections that are
perfectly vertical or horizontal.  In these cases only the first and last
point of the line is returned in the array.

So if you want to measure every point along the perimeter using
getPixel(xs[i], ys[i]), you need to check for every serial pair of points
that if x1 and x2 are equal or y1 and y2 are equal that there isn't a
stretch of vertical or horizontal points that are being missed.  I wrote a
macro for somebody that tested this condition and then filled in the
missing points, but I cannot find it to post it.  Sorry.

-Michael


At 11:07 AM 07/14/04 +0200, you wrote:
>This is from a macro that Wayne wrote (Mirror selection):
>
>  getSelectionCoordinates(sx, sy);
>
>the arrays sx and sy contain the x and y value for each pixel of the
>relection.
>
>Cheers,
>
>Pedro

____________________________________________________________________________
Michael Cammer   Analytical Imaging Facility   Albert Einstein Coll. of Med.
Jack & Pearl Resnick Campus      1300 Morris Park Ave.     Bronx, NY  10461
(718) 430-2890       Fax:  430-8996      URL:  http://www.aecom.yu.edu/aif/

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