Assess feasibility of Ops with all ImgLib2 image types #122
Description
When reviewing scijava/incubator#76 I was curious about its specializations for ArrayImg. I noticed we only have a copy Op for ArrayImgs and when I tried making a version of CopyArrayImgTest for PlanarImg it failed.
It seems like we want to ensure all Img types are supported, at least with a slow fallback.