Posted by
Herbie on
Jan 20, 2020; 5:19pm
URL: http://imagej.273.s1.nabble.com/Turbulent-Jet-Morphology-tp5022840p5022859.html
Dear Frank,
attached (see the follwing link) please find an ImageJ-macro that does the
proposed regional "Box Counting"-analyses for all images of a stack.
fractalDim.ijm
<
http://imagej.1557.x6.nabble.com/file/t380516/fractalDim.ijm>
(Perhaps you start with a single image, because the writing to the
results-table takes a while...)
Paste the macro code to an empty macro window (Plugins >> New >> Macro) and
run it with either a single image or a stack open in ImageJ.
Regional analyses are made for image selections that are 128pel wide.
The increment is half the width, i.e. 64pel, which means an overlap.
The filter parameters are not critical.
The automatic "Otsu"-threshold scheme works quite well for the supplied
image stack.
The D-Column of the results table gives the fractal dimension as defined by
"Box Counting"-approach. See "Examples" in:
<
https://en.wikipedia.org/wiki/Fractal_dimension>
Please also see the ImageJ user guide sub-subsection "30.14.2 Fractal Box
Count...":
<
https://imagej.nih.gov/ij/docs/guide/146-30.html#toc-Subsection-30.14>
HTH
Herbie
:::::::::::::::::::::::::::::::::::::::::::
Frank Shaffer wrote
> Herbie,
> The feature recognition only needs to work on one image. Then it can be
> repeated for the other images.
> If you find something that works, perhaps you can record it in a macro and
> post it.
> Thanks
> Frank
>
> On Mon, Jan 20, 2020, 10:02 AM Herbie <
> l16@
> > wrote:
>
>> Dear Frank,
>>
>> initially you provided a single image and now you provide an image
>> series.
>> I'm totally unsure what you like to see in the end.
>>
>> With respect to the single image you wrote:
>> "We would like to characterize the morphology (sizes, length scales,
>> etc.)."
>>
>> Is this still what you want or what does the image sequence mean?
>>
>> If you like, I can provide the result of my initial idea which works for
>> single images.
>>
>> BTW I've provided a link to the Wiki dealing with "Box Counting"-
>>
>> Regards
>>
>> Herbie
>>
>> :::::::::::::::::::::::::::::::::::::::::::
>>
>> Frank Shaffer wrote
>> > I don't have experience with the fractal recognition technique.
>> > If anyone would like to try their suggestions on an example video, you
>> can
>> > download it here:
>> >
>> > www.FDShaffer.net/Berkeley/Test_009_Fluorescent_enhanced.avi
>> >
>> > It's only 31 frames.
>> >
>> > If you technique works well, I will be happy to give you credit in our
>> > publications.
>> >
>> > Thanks,
>> > Frank Shaffer
>> > FDShaffer.Net
>> >
>> > --
>> > ImageJ mailing list:
http://imagej.nih.gov/ij/list.html>>
>>
>>
>>
>>
>> --
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>> ImageJ mailing list:
http://imagej.nih.gov/ij/list.html>>
>
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