Re: 16-bit grayscale from URL?

Posted by Zummy on Nov 23, 2005; 4:14am
URL: http://imagej.273.s1.nabble.com/16-bit-grayscale-from-URL-tp3704396p3704400.html

 From what I've seen of the Image I/O plugins, they work
on Files.  I am trying to read a 16-bit TIFF through
a URL that doesn't end in .tif.  I can download an
equivalent Image from the web site, and it displays fine if
I pass it as a argument to ImageJ.

I believe I am setting the Content-Type to image/tif

I looked through the code, and it looks like it is looking for
.tif or .TIF at the end of the URL.  So if I change
my URL from

http://hostname/dv/no_handler/Archive_Image.html?image_id=130267&type=tif

to

http://hostname/dv/no_handler/Archive_Image.html?image_id=130267&type=.tif

things start working.

I guess my request would be that ImageJ look at the
Content-Type instead of relying on an extension in the URL.
There are several Content-Types for TIFF.

The change would be in Opener.java, in the openURL
method.

As it is, my ImageJ applet hanging, and I have to kill it and my
browser.

I will pursue  adding the . to my code

John

At 09:08 AM 11/18/2005, Wayne Rasband wrote:

>>Hmm.  I am having trouble with TIFF.   I don't know
>>if it's ImageJ or ImageMagick, or just the size of the
>>images.  Thanks for the note though.  I will try
>>our download link to verify that the TIFFs are generated
>>from ImageMagick.
>>
>>I think I read somewhere that PNG can support 16-bit
>>greyscale.  Any hopes of seeing support in ImageJ?
>
>Jarek Sacha's Image I/O plugins read and write 16-bit PNGs.
>
>    http://ij-plugins.sourceforge.net/plugins/imageio/
>
>-wayne