Not every food-safety problem is visible
Machine vision can inspect conditions that can be captured optically. It does not replace microbiological testing, chemical analysis, metal detection or X-ray inspection where those methods are required.
CFIA guidance itself separates visual inspection from technologies such as metal detectors, X-ray equipment, optical sorting and scanner systems for foreign-material control.
The first technical decision is therefore: Is the condition visual, or does it require another measurement method?