USAF 1951 vs ISO 12233: Which Resolution Target Should You Use?
USAF 1951 and ISO 12233 both measure resolution, but differently: USAF is a visual, pass/fail limit in line pairs per millimetre from three-bar targets; ISO 12233 is an automated MTF/SFR curve from slanted edges. USAF suits optical hardware, microscopy and quick bench checks; ISO 12233 suits digital camera and lens image-quality testing. A neutral comparison to help you pick — with each pointing to the right target.
ISO 16505 SFR and MTF Testing for Camera Monitor Systems
ISO 16505 is the standard for camera monitor systems (CMS) that replace a vehicle’s mirrors, and its SFR chart measures the resolution of the whole camera-to-monitor chain — not just the camera. Why CMS testing images the display with a second camera, the slanted-edge SFR chart on an 18% gray background, the LW/PH spatial-frequency unit that trips people up, the multi-chart bundle ISO 16505 defines, and how it differs from ISO 12233.