Image Variants

Is it possible to assign specific variants to a subset of image records?

I have a repository with various images that are used for different puposes (ie. product photo, line drawing, chart, etc), each image type gets it's own variant.

Based on the type of image I want to only generate certain variants. Yet, when I run 'Generate Variants' it generates all the variants for all the images. This seems unnecessary.

Any ideas?