Re: curvature along the outline of a thresholded object

Posted by Thomas Boudier-5 on Jun 30, 2020; 8:19am
URL: http://imagej.273.s1.nabble.com/curvature-along-the-outline-of-a-thresholded-object-tp5023589p5023595.html

Hi Thomas,

As mentioned by Herbie, you can have a look to the Fourier Shape
Analysis, a very old plugin too ;-) .

https://imagejdocu.list.lu/plugin/analysis/fourier_shape_analysis/start

Best,

Thomas

On 6/30/20 5:24 AM, Thomas Fischer wrote:

> Thank you Bob,
>
> I looked at the description and could not find what I am aiming for.
>
> If after thresholding the object is perfectly circular, the result should
> be a constant value versus the pixels along the outline. If the object is
> bumpy, the function would not be constant any more. If part of the outline
> is concave the function would be negative there.
>
> Are you sure the plugin you mentioned does that?
>
> Best, Thomas
>
> Am Mo., 29. Juni 2020 um 22:40 Uhr schrieb Robert Dougherty
> <[hidden email]
>> :
>> Thomas,Measure ROI on OptiNav.info exists, but I have not touched it in
>> more than a decade....Bob
>>
>>
>> Sent from Smallbiz Yahoo Mail for iPhone
>>
>>
>> On Monday, June 29, 2020, 1:06 PM, Thomas Fischer <[hidden email]>
>> wrote:
>>
>> Hi everybody,
>>
>> is anybody aware of a plugin that calculates the curvature along the
>> outline of a thresholded object?
>>
>> thank you, Thomas
>>
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>>
>>
>>
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--
Thomas Boudier, Assoc. Prof. Scholar,
Institute Molecular Biology,
Academia Sinica, Taipei, Taiwan

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