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Table 2 Performance comparison of different image auto-focusing algorithms with variation of lens magnification

From: An image auto-focusing algorithm for industrial image measurement

  Brake pad Bearing
AF1 AF2 AF3 AF4 AF1 AF2 AF3 AF4
RMSE(mm) 0.0052 0.0096 0.0100 0.0025 0.0047 0.0084 0.0088 0.0021
SD(mm) 0.0054 0.0071 0.0078 0.0028 0.0051 0.0078 0.0086 0.0019
T(mm) 0.0170 0.0320 0.0300 0.0056 0.0210 0.0310 0.0190 0.0062
  Big standard cuboid Small standard cuboid
RMSE(mm) 0.0100 0.0110 0.0150 0.0011 0.0098 0.0112 0.0129 0.0018
SD(mm) 0.0095 0.1020 0.0143 0.0011 0.0094 0.0107 0.0123 0.0017
T(mm) 0.0290 0.0250 0.0340 0.0030 0.0270 0.0300 0.0310 0.0060