Re: Problems loading image from streaming servlet

[Abramoff-Michael]

This probably has nothingto do with Tomcat in itself. Most probably, IIS or TCP is blocking streaming without you being aware of it. IIS/Tomcat is not as dependable as Tomcat standalone in my limited experience.
Check progress of streaming, i.e. give the client time to catch up and you should be okay.

Michael Abramoff

Michael D. Abràmoff, MD, PhD
Assistant Professor of Clinical Ophthalmology / Assistant Professor of Electrical and Computer Engineering
Department of Ophthalmology and Visual Sciences
University of Iowa Hospital and Clinics, PFP 11290C
200 Hawkins Drive Iowa City, IA 52242
USA

Tel: [phone]. Secretary Val Bell: [phone].
Skype michael-abramoff [hidden email]

 

-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Markus Krischke
Sent: Tuesday, August 09, 2005 9:15 AM
To: [hidden email]
Subject: Problems loading image from streaming servlet

Hello everybody,

we´re using the imagej applet in a web application in combination with dicom images. Our application is running on a Windows 2003 machine with Tomcat 5.0, connected via ISAPI filter with IIS 6.0. The images for the applet are accessed by a streaming servlet which simply writes the image data to the outputstream of the browser.

As long as i access our application directly via Tomcat this works perfect.
However, when i access the application via IIS the applet loads the image only on every 3rd or 4th reload of the page. If it´s not loading the image only displays the url which it tries to open but no status bar appears.

Did anyone have similar problems accessing images over an url? Is there a known problem in IIS/Tomcat scenarios?

Thanks a lot for your help,
Markus

[Olivier Salvado]

Hello,

I am working with large (1380x1024x450) stacks of
RGB (24bits) images from episcopic microscope. I
would like to reformat my dataset at an arbitrary
angle (reformatting the whole volume). All I found
seemed to work only for gray level images.

I thought about splitting the three RGB planes,
reformatting each one separately and reforming a
RGB stack. This sounds like trouble, Any better
suggestion?

Thanks in advance.

___________________________
 
Olivier Salvado
Biomedical Engineering Department
Case Western Reserve University

[Wayne Rasband]

> I am working with large (1380x1024x450) stacks of
>  RGB (24bits) images from episcopic microscope. I
>  would like to reformat my dataset at an arbitrary
> angle (reformatting the whole volume). All I found
>  seemed to work only for gray level images.
>
>  I thought about splitting the three RGB planes,
>  reformatting each one separately and reforming a
>  RGB stack. This sounds like trouble, Any better
>  suggestion?

The Rotate plugin that is part of the TransformJ package at

     http://www.imagescience.org/meijering/software/transformj/

can rotate a stack an arbitrary number of degrees around any of its
axes.

You will probably need to reduce the size of the images when importing
them using File>Import>Image Sequence. A 1380x1024x450 RGB stack
requires 2.4 GB of memory. Setting "Scale Images" in the
File>Import>Image Sequence dialog to 50% reduces this to 606 MB.

-wayne

[Barthel, Kai Uwe]

You might use the volume viewer plugin which can be scripted. So writing a
macro could set up the volume viewer plugin to use the same transformation
(the same slice) for each channel. These three views could be stored and
then be recombined to a RGB-image.

If I find the time I might also try to extend my volume plugin to deal with
RGB-images. But I fear this will not be in the near future.

Kai

> Hello,
>
> I am working with large (1380x1024x450) stacks of
> RGB (24bits) images from episcopic microscope. I
> would like to reformat my dataset at an arbitrary
> angle (reformatting the whole volume). All I found
> seemed to work only for gray level images.
>
> I thought about splitting the three RGB planes,
> reformatting each one separately and reforming a
> RGB stack. This sounds like trouble, Any better
> suggestion?
>
> Thanks in advance.
>
> ___________________________
>
> Olivier Salvado
> Biomedical Engineering Department
> Case Western Reserve University

[Prodanov, D. (FYS)]

Hi,

I think that you should set a time-out variable in the applet and try to repeatedly load the image until the
timeout is reached (say 10 000 ms). Check also the configuration of IIS. I am not sure how well it does
integrate with Tomcat.

best regards

Dimiter

-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Markus Krischke
Sent: Tuesday, August 09, 2005 9:15 AM
To: [hidden email]
Subject: Problems loading image from streaming servlet

Hello everybody,

we´re using the imagej applet in a web application in combination with dicom images. Our application is running on a Windows 2003 machine with Tomcat 5.0, connected via ISAPI filter with IIS 6.0. The images for the applet are accessed by a streaming servlet which simply writes the image data to the outputstream of the browser.

As long as i access our application directly via Tomcat this works perfect.
However, when i access the application via IIS the applet loads the image only on every 3rd or 4th reload of the page. If it´s not loading the image only displays the url which it tries to open but no status bar appears.

Did anyone have similar problems accessing images over an url? Is there a known problem in IIS/Tomcat scenarios?

Thanks a lot for your help,
Markus

[Markus Krischke]

Hi,

Thanks for the hint. I changed the loading method of the plugin like you
suggested. I´ll try this improved version tomorrow...

Best regards,
Markus

-----Ursprüngliche Nachricht-----
Von: ImageJ Interest Group [mailto:[hidden email]] Im Auftrag von
Prodanov, D. (FYS)
Gesendet: Montag, 22. August 2005 10:43
An: [hidden email]
Betreff: Re: Problems loading image from streaming servlet

Hi,

I think that you should set a time-out variable in the applet and try to
repeatedly load the image until the
timeout is reached (say 10 000 ms). Check also the configuration of IIS. I
am not sure how well it does
integrate with Tomcat.

best regards

Dimiter

-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Markus
Krischke
Sent: Tuesday, August 09, 2005 9:15 AM
To: [hidden email]
Subject: Problems loading image from streaming servlet

Hello everybody,

we´re using the imagej applet in a web application in combination with dicom
images. Our application is running on a Windows 2003 machine with Tomcat
5.0, connected via ISAPI filter with IIS 6.0. The images for the applet are
accessed by a streaming servlet which simply writes the image data to the
outputstream of the browser.

As long as i access our application directly via Tomcat this works perfect.
However, when i access the application via IIS the applet loads the image
only on every 3rd or 4th reload of the page. If it´s not loading the image
only displays the url which it tries to open but no status bar appears.

Did anyone have similar problems accessing images over an url? Is there a
known problem in IIS/Tomcat scenarios?

Thanks a lot for your help,
Markus