Subversion Repositories SmartDukaan

Last modification

• Rev 37424 2026-08-26 19:05:20
• Author: amit

• Log message:

  Oppo/Realme slider captcha: size the calibration nudge from the gap
  
  r37422 replaced a 15px calibration nudge with a fixed 60px, which fixed the
  under-measurement but introduced the opposite error. Production data over 764
  calibrations shows 45% ended UNUSABLE (closed <= 0, i.e. the piece shot past the
  hole and the measured gap grew instead of shrinking), and among gaps under 60px
  it was 85%.
  
  The nudge is now sized from the gap -- aim to close about half of it -- and
  clamped to [10,60]. Replaying the real observed gap distribution: unusable and
  overshoot fall from 21% to 2%.
  
  The observed travel ratio in production is 1.13 circle px per slider px, against
  1.68 measured locally; it varies with render scale, which is why the ratio is
  still derived from the measurement. ASSUMED_RATIO only sizes the probe, and 1.7
  errs toward a smaller nudge, which is the safe direction here.
  
  Oppo is currently solving 43% (was 9% before r37422). Realme carries the same
  widget and the same defect and has not been deployed yet.