Re: Calculator Plus

Posted by ctrueden on Mar 29, 2017; 4:38pm
URL: http://imagej.273.s1.nabble.com/Calculator-Plus-tp5018377p5018413.html

Hi Thomas,

> As i understand - the quirk is there, but there's  also a workaround.

To comment on the Calculator Plus plugin [1] specifically: my understanding
is that Gabriel Landini is currently the maintainer of that plugin, which
is bundled with the Fiji distribution of ImageJ. However, essentially no
work (bug-fixes or improvements) have been done to that plugin for many
years. I do not know if Gabriel considers himself to be actively
maintaining the plugin these days -- I'll leave it to him to comment on
that. Perhaps he has insight into the behavior you observed.

Regards,
Curtis

--
Curtis Rueden
LOCI software architect - https://loci.wisc.edu/software
ImageJ2 lead, Fiji maintainer - https://imagej.net/User:Rueden
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[1] https://github.com/fiji/Calculator_Plus


On Tue, Mar 28, 2017 at 4:19 AM, Thomas Eschner <[hidden email]>
wrote:

>
> Hi Curtis, hi all,
>
> thank you for your input. As i understand - the quirk is there, but
> there's  also a workaround. That should do it at the moment.
>
> Thanks once more.
>
> Kind regards,
> Thomas
>
>
>
> Gesendet: Montag, 27. März 2017 um 18:03 Uhr
> Von: "Curtis Rueden" <[hidden email]>
> An: [hidden email]
> Betreff: Re: Calculator Plus
> Hi Thomas,
>
> I usually do these sorts of comparisons using the Image Calculator command,
> subtracting one image from the other, and checking the "32-bit result" box.
> This is fine if your goal is to illustrate visually as you say. For
> quantitative comparison, I agree with Joel that it's better to be more
> rigorous, with something like colocalization.
>
> Regards,
> Curtis
>
> --
> Curtis Rueden
> LOCI software architect - https://loci.wisc.edu/software
> ImageJ2 lead, Fiji maintainer - https://imagej.net/User:Rueden
> [https://imagej.net/User:Rueden]
> Did you know ImageJ has a forum? http://forum.imagej.net/[http:
> //forum.imagej.net/]
>
>
> On Mon, Mar 27, 2017 at 6:50 AM, Thomas Eschner <[hidden email]>
> wrote:
>
> > Dear all,
> >
> > I am trying to illustrate artefacts introduced by storing files as jpg by
> > showing the difference of two identical 16-bit images, one stored as jpg
> > and one as tiff.
> >
> > With Calculator Plus, setting e.g. Subtract with k1 = 1 and k2 = 16, I
> end
> > up with files having their values set to 65535 exclusively.
> >
> > Only with k2 = 0 I seem to get more or less reasonable results, but I
> lose
> > negative values.
> >
> > Could please anybody give me a hint?
> >
> > Thank you.
> >
> > Kind regards,
> > Thomas
> >
> > --
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> >
>
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