Re: newbie, looking for a digital caliper tool
Posted by
unxzst on
Jun 04, 2008; 5:54pm
URL: http://imagej.273.s1.nabble.com/newbie-looking-for-a-digital-caliper-tool-tp3696047p3696048.html
Thanks, Justin.
I've been crawling up this same wall, what seems user friendly to us, may
be inexplicaply complex to someone that is not computer-savvy: the end-
user. I am shooting for minimal complexity:
Step 1: position/size/rotate caliper lines with keyboard.
Step 3: press Enter to take measurment.
The problem with the images is that they are fairly warped, and deciding
the right measurment through user input seems the logical choice.
for example:
http://i51.photobucket.com/albums/f356/Unxzst/DSCN1560.jpghttp://i51.photobucket.com/albums/f356/Unxzst/DSCN1487.jpgOn Wed, 4 Jun 2008 11:31:28 -0500, Justin McGrath <
[hidden email]> wrote:
>Wouldn't drawing with the line tool then using measure work? It will
>create a table of lengths, which is pretty user friendly.
>
>If you wanted to get fancier and get a length that you're fairly sure
>is perpendicular, you could find the angles of the parallel lines
>(either by the user drawing with the line tool or through some image
>processing technique), then calculate the length of the line segment
>perpendicular to them. With a macro, you could have it so that the
>user needs to only draw two lines. If you can find the angles with
>image processing, then you could eliminate all user input. The Hough
>transform is one that can find lines, but I don't think there's a
>plugin for ImageJ. If all of your lines are vertical, you can do a
>much simplified Hough transorm pretty easily.
>
>A rotating calipers tool seems needlessly complicated.
>
>Justin
>