Adding custom measurement

Posted by Peter Haub on Nov 23, 2013; 4:59pm
URL: http://imagej.273.s1.nabble.com/Adding-a-measurement-type-tp5005620p5005672.html

Adrians idea is very nice.

Just to give an input (no a solution) to this:

I could imagine the possibility to specify a (set of) 'user defined
measurement macro' or a 'user defined measurement plugin'.
This 'user defined measurements' could be selected in the measurement
dialog, e.g. as UDMM_xx or UDMP_xx where xx is a number 00 .. 99.

The modification in ImageJ should be not to complicated and the
definition of an appropriate interface, return value and naming scheme
of the macro/plugin not to complex.

Peter

On 22.11.2013 18:47, Adrian Daerr wrote:

> Hello,
>
> On 11/20/2013 04:00 PM, Grant Harris wrote:
>> I'd like to add a measurement for circular/directional statistics for
>> calculating the average orientation of an area/ROI.
>> I'd like to do this so that I can utilize the functionality of the
>> RoiManager and the ResultsTable, e.g. select a number of ROIs, do the
>> measurement, and have the results in a table.  Does anyone have an
>> idea on how to do this?
>
> I have no answer to your question, but merely want to highlight the
> part of it which has not been discussed. So far contributions focussed
> directly on the problem at hand of measuring orientations, but I would
> find really interesting if there were also ideas on how to allow
> adding custom measurements in general. I have wanted to do that on
> several occasions (two examples: to measure fourier coefficients on
> the rim of circular selections; to measure the mean intensity on the
> boundary of a ROI). If there was a way to easily add to the
> measurement dialog a function/plugin(via a new MeasurementFilter
> interface?)/macro that takes an image+(roi/mask) as input and returns
> one or more double values, one could calculate any quantity on
> selections with minimal coding, and benefit from ImageJ's measurement
> functionalities mentioned by GH.
>
> I have no idea if this is easy to implement, but it might be a feature
> request worth considering for IJ1 or IJ2.
>
> cheers,
> Adrian
> (frequent user of the Process->Math->Macro..., which by allowing for
> arbitrary functions has sharply reduced the need for one-shot plugins
> iterating over all pixels and images)
>
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>
>

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