Image J - overlay

Posted by O'Brien.Joseph on
URL: http://imagej.273.s1.nabble.com/Image-J-overlay-tp3701104.html

Dear Image J community.

It's a cold afternoon here in the UK and Im struggling with the program.. Can u help?

The question is.......Can imageJ perform an 'overlay' function?

"What is overlay ?" I hear you ask.
Other software performs overlay by mixing pixels i.e pixel 1 from col 1, row1 belongs to ct image. Then pixel 2 from col 2, row 1 belongs to nuc med image. Then pixel 3 from col 3, row1 belongs to ct image. And so on.

I want to overaly a nucmed functional image over a CT structural image.

Can it be done?

Kind regards in advance

Yours shiveringly

Joe O'Brien
Clinical Scientist (Nuclear Medicine)
Department of Physics and Nuclear Medicine
City Hospital
Dudley Road
Birmingham
UK



-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Michael Weber
Sent: 02 November 2006 13.10
To: [hidden email]
Subject: Re: AW: Out of available memory? Help!


Hi,

it usually works for us if we:

- define the amount of RAM in the config (~75% of system memory)
- have this amount of RAM free (double check with the task manager, if
you're a Windows user)
- use the newest Java version
- run only one instance of ImageJ

Maybe this helps.

cheers,
Michael


Lucas, Falk /BDF HAM schrieb:

> Hi,
>
> we have encountered this issue too and found an solution, but only for
> some of our machines...
>
> We had an early version (1.31) on hte machines and I set up an script
> for just overwriting hte old version with a new one, which results in the same error message you get.
> Solution: Delete the ImagJ Folder completly and install/copy the current version again.
> However, if your account (on a PC) is  just associated with the user group (minimum rights), this message can still be there. We never encountered the message  if the user is in the main user or admin group.
>
> Falk
>
> -----Ursprüngliche Nachricht-----
> Von: ImageJ Interest Group [mailto:[hidden email]] Im Auftrag von
> Jonathan Thomas
> Gesendet: Mittwoch, 1. November 2006 23:23
> An: [hidden email]
> Betreff: Out of available memory? Help!
>
> (cliffs at bottom)
>
> I am currently trying to use ImageJ to do image segmentation on some
> ~11MB RGB images.  The images load fine into ImageJ, but if I attempt
> to do any filtering on them ImageJ throws this error:
>
> <Out of memory>
> <All available memory (63MB) has been>
> <used. Instructions for making more>
> <available can be found in the "Memory" > <sections of the
> installation notes at> <http://rsb.info.nih.gov/ij/docs/install/>
>
> I then poked through the options and raised the memory alotted to
> 500MB, closed ImageJ and reopened it attempted the same operation and
> got an identical error.  Even mentioning 63MB.  Note that the default
> was not 63 MB nor was the max memory set anywhere near 63MB after I
> changed it.
>
>
> So I came here, and I see people recommending changing the command
> given to the executable, so I checked my ImageJ.cfg and it reads:
>
> .
> C:\Program Files\Java\j2re1.4.2_03\bin\javaw.exe
> -Xmx500m -cp ij.jar ij.ImageJ
>
> In a previous thread someone mentioned a similar problem and modifying
> this line fixed the problem but I believe that java should have plenty
> of memory the way I have it configured.
>
> So that's my problem, I'd appreciate any help you guys can give me.
>
> If you have read this far here is some more information that may be
> helpful:
>
> 2.99Ghz Pentium D
> 2GB Ram
>
> ImageJ 1.36b
> Java 1.5.0_06
> About ImageJ displays 55MB of 500MB (11%) while the error message is
> still in the log.
>
> The java is on this machine, while the ImageJ is being run from a
> network drive.  The same error arrizes when I run ImageJ as an applet
> from the NIH page.
>
> I have contacted the sys admin and he assures me that there is no
> constraint put on memory used by a user, with the exception of the
> physical memory on the machine and what is being used by other
> software.
>
> Software running in the background or not has no effect on the error
> message.
>
> I have replicated this error on 2 machines, each using their own local
> java but the same ImageJ off the same network drive.  I have also
> replicated it running ImageJ as an applet on both machines.
>
> Curiously when I look at the size of the image in windows it is listed
> as 11MB, but ImageJ claims it's 27MB.  (perhaps this is extra space for a
> buffer?)  One image is 2915x2456 pixel tiff.  The others are similar.  All tiffs, all RGB, all produce the same error.
>
> If you have made it this far I truly commend you.  Thank you for the
> attention and here's a quote for your efforts.
>
> "'That is indisputable,' was the answer, 'but in this country it is a
> good thing to kill an admiral from time to time to encourage the
> others.'" -Voltaire (François-Marie Arouet), Candide
>
> Thank you for any help you can give me.
> -Stumped in StonyBrook
>
>
>
>
>
> finally cliffnotes:
> 1. ImageJ throws an out of memory error when I try to analyze some
> large tiff images 2. The machine has plenty of memory and so does
> java. 3. Solutions to similar problems from this listserv do not help.
> 4. Recent software, reproducible. 5. HELP! 6. quote for your efforts,
> thanks!
>
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