Posted by
Robert Dougherty on
Jul 11, 2020; 6:00am
URL: http://imagej.273.s1.nabble.com/curvature-along-the-outline-of-a-thresholded-object-tp5023589p5023661.html
Thomas,
I have updated the plugin at
http://www.optinav.info/Curvature.htm. Version 5 shows tabular output and is probably more accurate than my earlier version.
Bob
On Sunday, July 5, 2020, 10:14:07 AM PDT, Thomas Fischer <
[hidden email]> wrote:
Dear Bob,
My reply is late because I had computer problems. The result of the plugin
looks nice. In order to use it I would need two features
1) A parameter to tune the sensitivity. Right now it is not sensitive
enough for my purpose. I am aware that an increase in sensitivity would
make the result more noisy. But as with the plugin of Thomas I would do the
smoothing afterwards.
2) A list of the curvature values along the circumference. Just looking at
the nice result is not enough in my case. I have to extract numbers from
this list.
I am content with the plugin of Thomas. But as we say in German: the better
is the enemy of the good.
Best regards, Thomas
Am So., 5. Juli 2020 um 07:33 Uhr schrieb Robert Dougherty <
[hidden email]
>:
> Gabriel,
> Thanks. In case it matters, there is a new version with smoother
> calculation and a black background.
> Bob
>
> On Saturday, July 4, 2020, 11:33:56 AM PDT, Gabriel Landini <
>
[hidden email]> wrote:
>
> Thanks Bob, I can confirm that it works fine.
> I think colourblind observers (red-green type) would see the green as some
> shades of yellow and blue as blue. At lease that is what the Dichromacy
> plugin
> shows.
> Regards
>
> Gabriel
>
>
> On Saturday, 4 July 2020 18:05:09 BST you wrote:
> > Gabriel,
> > In the meantime, I tried and failed to track down how ImageJ is supposed
> to
> > load the Phase LUT. Giving up, I changed the code to use another
> > sign-friendly LUT that I coded explicitly. Now Curvature displays the
> > results in green-blue. Going forward, it may be a question of which color
> > scheme is better. One could experiment by running the new version of
> > Curvature and then manually changing the LUT to Phase to simulate the old
> > version. Perhaps green-blue is better for colorblindness than the
> red-blue
> > scheme of Phase?
> >
> > Bob
>
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