Why depth information changes what inspection tasks are actually possible — and why no amount of resolution turns a flat image into a height measurement.
A standard camera captures a flat, two-dimensional image: X-Y pixel intensity and color, full stop. No matter how sharp the lens or how many megapixels the sensor has, that image carries no direct information about how far away any point in the scene actually was, or how tall any object actually is. A 3D vision system solves a fundamentally different problem — it captures actual depth, producing a point cloud or height map where every pixel also has a Z value. Picking the wrong one for a task isn't a tuning problem. It's a system-design decision with a real failure mode on the other side of it.