Re: "Set Threshold" records incorrect values - 16bit images - Ubuntu

Posted by Gabriel Landini on Aug 27, 2008; 12:54pm
URL: http://imagej.273.s1.nabble.com/Set-Threshold-records-incorrect-values-16bit-images-Ubuntu-tp3695217p3695219.html

On Wednesday 27 August 2008, Ghislain Bugnicourt wrote:
> I could test the 'threshold set' option on various OS : (all from the same
> ij140.x86.tar.gz file)

Is this always the same machine?

>  - on Ubuntu 8.04, Knopix 5.1, Debian (I didn't look at the version),
> Ubuntu 7.04, the problem appeared.
>  - surprisingly, the problem did not appear on Fedora 4 (java version
> 1.6.0_05).
>  - I couldn't try on suse

I could (11.0), and it does not happen.

> It implies that it is not a bug included into the tar.gz file, but rather a
> java problem. As I said, I didn't find any java version that worked better
> than another.

So what happens if you run this macro with your image:

setThreshold(445, 1000);

What does the threshold window show?
Could it be the slider resolution?

> List of all the java versions I tried on my computer : 1.5.0, 1.6.0_05,
> 1.6.0_06, 1.6.0_07, and openjdk 1.6.

Hm... this sounds very strange. What CPU do you have? There have been some
weird things going on with multiple core cpus (but none currently I am aware
of).

Have you tried with an updated version of the ij.jar? 1.40 is not new (I have
installed 1.41k) and what you see might not happen in an updated IJ.

G.