units of intensity

[Kobilo-Moav, Tali]

What are the units of intensity measure?
Thank you
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[Herbie-4]

Tali Kobilo-Moav,

what kind of images do you consider?

8bit, RGB, 32bit etc ?

Calibrated images or not?

For details see the ImageJ-manual at
        <rsb.info.nih.gov/ij/docs/guide/user-guide.pdf>

Best

Herbie

:::::::::::::::::::::::::::::::::::::::::::
On 02.10.14 19:39, Kobilo-Moav, Tali wrote:
> What are the units of intensity measure?
> Thank you
> Disclaimer:
> The materials in this e-mail are private and may contain Protected Health Information. Please note that e-mail is not necessarily confidential or secure. Your use of e-mail constitutes your acknowledgment of these confidentiality and security limitations. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying, distribution, or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender via telephone or return e-mail.
>
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> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
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[Peter Mc]

Amperes??

I am curious, could you be more specific??

[Cammer, Michael]

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-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Kobilo-Moav, Tali
Sent: Thursday, October 02, 2014 1:39 PM
To: [hidden email]
Subject: units of intensity

What are the units of intensity measure?
Thank you
Disclaimer:
The materials in this e-mail are private and may contain Protected Health Information. Please note that e-mail is not necessarily confidential or secure. Your use of e-mail constitutes your acknowledgment of these confidentiality and security limitations. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying, distribution, or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender via telephone or return e-mail.

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[Rebecca Keller]

Shalom Tali,

The problem is your question does not have enough detail for us to help
you--intensity is just a feature of the image, and is therefore unitless.
Images are arrays of numbers, and that's all. Pixel a at coordinates x,y
has a value of 14, whatever. If you want a unit, you have to say what you
are measuring, and how the numbers in your image correspond to the real
world. An intensity value could be in standard deviations, elevation above
sea level, photons per second, etc. It just depends what you are measuring.
Images are merely shadows on the wall of a cave. If you say a bit more
about why you want to know the units, or what you are trying to measure, we
can help you out better.

A gmar chasima tova,

Jacob


*******************************************

Jacob Pearson Keller, PhD

Looger Lab/HHMI Janelia Farms Research Campus

19700 Helix Dr, Ashburn, VA 20147

email: [hidden email]

*******************************************





On Thu, Oct 2, 2014 at 1:39 PM, Kobilo-Moav, Tali <
[hidden email]> wrote:

> What are the units of intensity measure?
> Thank you
> Disclaimer:
> The materials in this e-mail are private and may contain Protected Health
> Information. Please note that e-mail is not necessarily confidential or
> secure. Your use of e-mail constitutes your acknowledgment of these
> confidentiality and security limitations. If you are not the intended
> recipient, be advised that any unauthorized use, disclosure, copying,
> distribution, or the taking of any action in reliance on the contents of
> this information is strictly prohibited. If you have received this e-mail
> in error, please immediately notify the sender via telephone or return
> e-mail.
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

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