(you even get an answer on Sunday ;-)).
Do you know the approximate timeframe of the "Row-to-Rows". feature release for ImageJ2? Will ImageJ1.x Node Macro ever support „Row-to-Rows“?
I don't want to make promises we can't hold. But it should be ready in Q4 2016. We are still trying to understand what's the most logical way to represent this behaviour in an ImageJ-Plugin.
My problem does not only concern cropping, actually I have a number of plug-ins that recognize certain parts of an image using differing methods. For comparing them, I intended to display the output as a row of images, so the workaround might not solve that issue.
Actually, if I understand you correctly, ImgLabeling is exactly what you need. ImgLabelings allow you to represent certain areas in your image and with the Interactive Segmentation Viewer you can then have a look at the overlays and compare the results to other (see our example workflow on the Example Server).
allows you to create an ImgLabeling. You can get a Cursor or RandomAccess as from Img(s).
By the way, when will KNIME Image processing get out of the beta phase?
KNIME Image Processing is on version 1.4.1. We will release 1.5 or 1.4.3 (we haven't decided yet) in the next couple of weeks and besides that we are already working on KNIME Image Processing 2.0 which will be faster and more hard-disc friendly. Also 2.0 will add types as transformations (e.g. for transformation), region of interest etc. So KNIP itself is out of Beta.
I hope this information helps you. If you need an code sample for ImgLabelings, let me know!