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Table 4 Precision evaluation for the four methods

From: Comparing 3D foot scanning with conventional measurement methods

Dimension MADa(mm) Maximum allowable error in ANSUR [[27]] (mm)
3D foot scanning Digital caliper Digital footprint Ink footprint
Foot length 1.50 1.41 1.53 1.60 3.00
Ball of foot length 1.36 2.40 1.46 1.80 6.00
Outside ball of foot length 1.34 2.01 1.41 1.90  
Foot breadth diagonal 0.73 1.42 0.77 2.65  
Foot breadth horizontal 0.79 1.66 0.83 1.75 2.00
Heel breadth 0.91 0.80 0.86 1.20 2.00
  1. aMAD between the repeated measurements.