Re: 16-bit grayscale from URL?

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Re: 16-bit grayscale from URL?

Jeff Brandenburg
I'm a little behind on my reading...

On Nov 22, 2005, at 11:14 PM, John Carlson wrote:

> 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

For what it's worth, I (unintentionally) worked around the problem with  
code like this:

             URL getImage = new URL(sliceURL);
             URLConnection c1 = getImage.openConnection();
             c1.setRequestProperty("Cookie", cookie);
             InputStream is = c1.getInputStream();
             ImagePlus imp = new Opener().openTiff(is, title);

In other words, I get an input stream on a URL, then call  
Opener.openTiff() on that.  I did it this way because I needed to add a  
cookie header to the request, but this also got me around the  
file-extension problem.  (My URLs are of the form  
http://hostname/app/civmastiff3d?count=1&slice=99 .)
--
        -jeffB (Jeff Brandenburg, Duke Center for In-Vivo Microscopy)