How to Apply Global Scale Value?

[John Livesey]

I sent the message below about a week ago, but because it appeared on a
weekend, it might not have caught the attention of the folks who might be
able to answer it.  I'm hoping that someone who knows will be able to answer
this (I fear "painfully basic") question:

I'm modifying (with my very rudimentary java skills) a plugin to report the
x,y coordinates of points on which one clicks... (the rest of the plugin
handles numbering and marking points and was kindly provided to me by a
generous imageJ user in Spain [thank you!]).  I've figured out how to report
the location of a click in pixels and write that to the results window, but
since the image has been scaled (Analyze > Set Scale - global) outside the
plugin, I'd also like to report the scaled values, since the image
information header reports scaled values.  However, I've not located the
function / variable into which the global scale factor is stored by the Set
Scale dialog... Can someone let me know what this variable is and briefly
how to apply it? [or point me to the appropriate documentation of this
variable, which I'm sure is there, but I cannot seem to find].

Thanks,
John
- - - - -
John Livesey, [hidden email] / 01-209-946-2485

[Volker Baecker]

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Hi,
use ImagePlus.getGlobalCalibration() to get the Calibration object. Use
the methods of Calibration to get the information you want. See

http://rsb.info.nih.gov/ij/developer/api/ij/ImagePlus.html#getGlobalCalibration()
and
http://rsb.info.nih.gov/ij/developer/api/ij/measure/Calibration.html

Volker

John Livesey a écrit :

> I sent the message below about a week ago, but because it appeared on a
> weekend, it might not have caught the attention of the folks who might
> be able to answer it.  I'm hoping that someone who knows will be able to
> answer this (I fear "painfully basic") question:
>
> I'm modifying (with my very rudimentary java skills) a plugin to report
> the x,y coordinates of points on which one clicks... (the rest of the
> plugin handles numbering and marking points and was kindly provided to
> me by a generous imageJ user in Spain [thank you!]).  I've figured out
> how to report the location of a click in pixels and write that to the
> results window, but since the image has been scaled (Analyze > Set Scale
> - global) outside the plugin, I'd also like to report the scaled values,
> since the image information header reports scaled values.  However, I've
> not located the function / variable into which the global scale factor
> is stored by the Set Scale dialog... Can someone let me know what this
> variable is and briefly how to apply it? [or point me to the appropriate
> documentation of this variable, which I'm sure is there, but I cannot
> seem to find].
>
> Thanks,
> John
> - - - - -
> John Livesey, [hidden email] / 01-209-946-2485

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[Volker Baecker]

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Hi,
my last message was inexact. You need to send getGlobalCalibration() to
an ImagePlus object, not to the class.
The best thing to do might be to get the image and use the method
getCalibration(). If a global calibration exists the method answers the
global calibration otherwise it answers the local calibration of the image.
Volker

Volker Bäcker a écrit :

> Hi,
> use ImagePlus.getGlobalCalibration() to get the Calibration object. Use
> the methods of Calibration to get the information you want. See
>
> http://rsb.info.nih.gov/ij/developer/api/ij/ImagePlus.html#getGlobalCalibration()
> and
> http://rsb.info.nih.gov/ij/developer/api/ij/measure/Calibration.html
>
> Volker
>
> John Livesey a écrit :
>> I sent the message below about a week ago, but because it appeared on a
>> weekend, it might not have caught the attention of the folks who might
>> be able to answer it.  I'm hoping that someone who knows will be able to
>> answer this (I fear "painfully basic") question:
>
>> I'm modifying (with my very rudimentary java skills) a plugin to report
>> the x,y coordinates of points on which one clicks... (the rest of the
>> plugin handles numbering and marking points and was kindly provided to
>> me by a generous imageJ user in Spain [thank you!]).  I've figured out
>> how to report the location of a click in pixels and write that to the
>> results window, but since the image has been scaled (Analyze > Set Scale
>> - global) outside the plugin, I'd also like to report the scaled values,
>> since the image information header reports scaled values.  However, I've
>> not located the function / variable into which the global scale factor
>> is stored by the Set Scale dialog... Can someone let me know what this
>> variable is and briefly how to apply it? [or point me to the appropriate
>> documentation of this variable, which I'm sure is there, but I cannot
>> seem to find].
>
>> Thanks,
>> John
>> - - - - -
>> John Livesey, [hidden email] / 01-209-946-2485

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passerelle antivirus du campus CNRS de Montpellier
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