assistance

[Andrew Lumley]

Dear Image J interest Group,


I was wondering if someone would be able to help me with a question I have
regarding the freehand selection tool in Image J...?


My question is - what units does imageJ use when calculating area using the
freehand selection tool?


Iv attached a picture to this email to show you what I mean.


I would be really grateful if someone could help with this issue.


Best regards,

(See attached file: area units.png)


Andrew



_________________________________
Andrew Lumley
Technician
Laboratory of Cardiovascular Research
Centre de Recherche Public de la Santé (CRP-Santé)
84, Val Fleuri, L-1526 Luxembourg
Luxembourg
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Email: [hidden email]
Website: http://www.crp-sante.lu

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[Michael Schmid]

Hi Andrew,

measurements in ImageJ are in calibrated units.  E.g., if your image is calibrated to give lengths in millimeters, the area is in square millimeters.

If you want to know the area in pixels, you can remove the scale in the Analyze>'Set Scale' menu.
Alternatively, use a simple macro
  getRawStatistics(nPixels);
  print(nPixels);

Michael
________________________________________________________________
On Oct 14, 2013, at 15:10, Andrew Lumley wrote:

>
>
> Dear Image J interest Group,
>
>
> I was wondering if someone would be able to help me with a question I have
> regarding the freehand selection tool in Image J...?
>
>
> My question is - what units does imageJ use when calculating area using the
> freehand selection tool?
>
>
> Iv attached a picture to this email to show you what I mean.
>
>
> I would be really grateful if someone could help with this issue.
>
>
> Best regards,
>
> (See attached file: area units.png)
>
>
> Andrew
>
>
>
> _________________________________
> Andrew Lumley
> Technician
> Laboratory of Cardiovascular Research
> Centre de Recherche Public de la Santé (CRP-Santé)
> 84, Val Fleuri, L-1526 Luxembourg
> Luxembourg
> Fax: [phone]
> Email: [hidden email]
> Website: http://www.crp-sante.lu
>
> Join us on Facebook and follow our activities on Twitter:
> http://www.facebook.com/crpsante
> http://twitter.com/crpsante
>
> This message (including any attachments) is intended for the addressee only
> and may contain confidential and/or privileged information and/or
> information protected by intellectual property rights. If you have received
> this message  by mistake, please notify the sender by return e-mail and
> delete this message from your system. You should not use, alter, copy or
> distribute this message or disclose its contents to anyone. E-mail
> transmission can not be guaranteed to be secure or error free as
> information could be intercepted, corrupted, lost, destroyed, arrive late
> or incomplete, or contain viruses. CRP-Santé shall not be responsible nor
> liable for the proper and complete transmission of the information
> contained in this communication nor for any delay in its receipt or damage
> to your system.
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
> <area units.png>

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ImageJ mailing list: http://imagej.nih.gov/ij/list.html