Assessing Food Inspection Techniques . Optical, hyperspectral, and x-ray imaging, along with spectroscopy, are used for different types of food inspection, from grading meat to spotting foreign material. Albert Tu, Hamamatsu Corp. A decade ago, food supply was not an issue for most of the world’s population, but today the world is facing a food crisis. Multiple factors have contributed to the problem, including recent supply chain issues, delivery and labor sho...