A Reference-Based Protocol for Assessing Image Displacement and Scale Stability

We present a reference-based protocol for assessing image stability, illustrated with a passive lens support. Pre/post-event wall references separate image-centre displacement from scale change. All 70 trials were retained: 30 baseline and 40 supported, acquired sequentially. Displacement (p = 0.597) and scale spread (p = 0.356) showed no significant difference. Lower median absolute scale deviation in the supported run persisted with scene-only processing, but its cause remains unresolved. Marker-estimation eligibility differed completely between runs for an unknown reason. The contribution is a workflow that reports completerun variability, typical deviations and estimator coverage together; the case study does not establish support efficacy, equivalence or transient damping.