Re: Antwort: Image IO py plugin

Posted by Lothar Leidner on Apr 27, 2009; 1:54pm
URL: http://imagej.273.s1.nabble.com/Image-IO-py-plugin-tp3692776p3692778.html

Hello Joachim,

I'm sorry for the late answer, I was out of office.

Joachim Wesner schrieb:
> Hi Lothar,
>
> did you resolve your problem? I actually encountered a similar situation
> with a pair of plugins that read and write binary Zygo interferometer
> files (.dat) (BTW anybody working ininterferometry and using ImageJ
> and wanting to share stuff and knowledge?)
>
>  

I haven't really resolved the problem. But as I know all the relevant
header data of my b16 image files I can create a FileInfo object in both
B16Reader and B16Writer classes. There is no need for me at the moment
to communicate between these classes. I use ImageJ only to do some
filter operations and store the image back into a new B16 file. The
subsequent image processing is unparalleled and is done by my "private"
image processing software.

Thank you for your help. Kind regards,

Lothar Leidner

> These files have quite a lot of extra info in the header that I want
> to be retained or at least to be accessible after reading stuff and
> probably
> later write back the original or modified info (Should also be accessible
> via a macro, at best)
>
> I do this using the ImagePlus setProperty and getProperty methods,
> you can in principle attach any named object (denoted a a key string)
> to an ImagePlus, but if you want to read/write those from a macro too,
> you need to restrict to strings. (From a macro, you can load a simple
> class and read/write the properties through the added static method:
>
> http://rsb.info.nih.gov/ij/plugins/imp-props.html
> )
>
> However, in further processing, this info will be lost, i.e. not appear
> in the result ImagePlus IIRC, so you have to take care to move the info you
> want to the output ImagePlus!
>
> Mit freundlichen Grüßen / Best regards
>
> Joachim Wesner
>
>
> Leica Microsystems CMS GmbH | GmbH mit Sitz in Wetzlar | Amtsgericht
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>
>
>
> Hello,
>
> thank you all for your help so far. I have now learned that there is no
> permanent connection between a FileInfo object and the ImagePlus object.
> In the meantime I've tried to solve the problem of communication between
> the two classes B16Reader_ and B16Writer_, but without success. How can
> I pass the Reader's FileInfo "fi" object to a (not yet existing) writer
> object?
>
>  > Do you also see this problem with the imp.getOriginalFileInfo() method?
>
> The implementation below did not work:
>
> B16Reader:
> imp.setFileInfo(fi);
>
> B16Writer:
> fi = imp.getOriginalFileInfo();
>
> In that case even the number of pixels gets lost and the following error
> code pops up:
> java.io.IOException: ImageWriter: fi.pixels==null
>
> I must admit I don't understand how the method setFileInfo should work.
> As there is no FileInfo object located in the ImagePlus class field it
> is not surprising for me that the information gets lost.
>
> As I found that in the case of Sensicam images both header size and byte
> order are always the same there is no longer any need to pass these data
> from the reader to the writer class. So I can live with the plugin as it
> is.
>
> Thanks again
>
> Lothar Leidner
>
>
> --
> ===============================================
> Lothar Leidner
> Institute of Theoretical and Physical Chemistry
> University of Tuebingen
> Auf der Morgenstelle 18
> D-72076 Tübingen
> E-Mail: [hidden email]
> Phone: [phone]
>
>
>
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--
===============================================
Lothar Leidner
Institute of Theoretical and Physical Chemistry
University of Tuebingen
Auf der Morgenstelle 18
D-72076 Tübingen
E-Mail: [hidden email]
Phone: [phone]
Fax: [phone]