It's difficult to diagnose or fix a problem if you can't see it, and these cameras help you see what's going on in ...

What does it take for an airliner that has been flying freight for decades to be told, in essence, to sit down immediately?

Abstract: Aiming at the limitations of the existing evaluation indices for aero-engine borescope image enhancement, this paper proposes a Structural-Perceptual Fidelity Index (SPFI) evaluation system.