Hello,

As I try to migrate from ImageJ and Fiji to Inkscape, I am trying to find a way to open its own vector-based format files (*.roi) in Inkscape. These *.roi files are used for annotating images in ImageJ in the form of lines, polygons, etc.

The folks on the ImageJ IRC channel were not aware of a direct way to import *.roi files into Inkscape, and suggested I might have to write an ImageJ plugin to export *.roi to *.svg. However, I don't know any Java to write the plugin, so I would like to ask if anyone here has experience with ImageJ, and knows if there is a way to use *.roi in Inkscape???

BTW, I have uploaded a ZIP file containing example *.roi files in case that might be helpful in developing a solution.

Thank you very much!

You could try saving as PDF in Fiji and open it in inkscape.
inkscape converts pdf to vector on open. your mileage may vary depending on complexity of the drawing/diagram.

I tried saving it as PDF, but apparently ImageJ flattens the image, and no vector information is retained to be used in Inkscape... Thanks for the suggestion, though!

I may have to manually write an ImageJ/Fiji script to do this after all. Would I have to make it export to SVG, or are there easier formats that would work well with Inkscape? I ask because ImageJ does not come with XML or SVG libraries to export to such formats, so I will have to manually parse my objects in ImageJ into SVG XML format... In the meantime if anyone has other suggestions please let me know. Thanks!

I gave pretty detailed instructions how to write that plugin. Actually, I was almost writing the plugin down line by line: http://fiji.sc/cgi-bin/fiji-irc?times=p ... 801T161556

It should be very straight-forward for a C programmer to turn that conversation into a working plugin, and it should not even take half an hour to do that.

So I am a bit at a loss what more you want me to do to enable you to solve your problem.