In the course of the review of DM-9932, I noticed a number of classes with virtual destructors that probably don't need them (I think just due to the paranoia many new C++ developers have when they first learn about destructors; these are all very old classes). Fixing that is out of scope for DM-9932, but we should eventually look more carefully at each case and then remove them.

The classes in question:

• Exposure
• ImagePca
• ImageBase
• Image
• Mask
• BackgroundControl