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

Posted by David Randell on Aug 27, 2008; 7:43pm
URL: http://imagej.273.s1.nabble.com/Set-Threshold-records-incorrect-values-16bit-images-Ubuntu-tp3695217p3695240.html

Ghislain Bugnicourt wrote:
> I confirm that David Randell and I have exactly the same problem.
> I even witnessed the same list of min/max values on this image, and
> sometimes the list is different. Which implies that the change in the values
> is 'semi-arbitrary'.
>  

Hi Ghislain,

Yes its semi-arbitrary in the sense that while the list of values
changes with repeated attempts to replicate the bug, the individual
(min/max) thresholded values returned for the thresholded image have a
distinct pattern to them...

(I did note by the way for a couple of runs and values returned the
image does NOT change to reflect them, but seems to return back to the
original image and stays put?...)
> David, can you tell us what CPU you use, and your memory for instance (and
> anything I forget...)? I witnessed the bug with 512M and 256M in the 'run'
> command (I've got 1GB DDR2), but nobody knows.
>  

I'm using a vintage Fujitsu-Siemens Amilo A (CY-26) laptop:

CPU: mobile AMD Athlon (tm) 1600+
Graphics: ATi Radeon Mobility U1
RAM: 471 MB

ImageJ version 1.41j
Java.version: 1.6.0_05

Ubuntu 8.04
Kernel Linux 2.6.24-19-generic
GNOME: 2.22.3

ImageJ run settings:
~/ImageJ/jre/bin/java -Xmx512m -jar ~/ImageJ/ij.jar -ijpath ~/ImageJ

(NB. Changing the memory to 256m makes no difference to the appearance
of the bug.)

Dave Randell