I am using the Trainable Weka Segmentation 3D plugin to generate a 2-channel probability map. The (minor) issue is that I am not able to split the channels of the resulting map (using Image -> Color -> Split Channels) unless the map is first saved and then re-loaded into ImageJ. The error states “multichannel image required”. Is this a bug? I made sure that the image is active and that no other images are open in ImageJ.
I have tried this both in ImageJ 1.52p and 1.52s
Also note that this issue occurs with probability maps generated with Labkit as well, so it may not be plugin-specific.
Here is a screenshot of the image properties: