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Table 4 Mean standard deviations (SD) of each algorithm variable across subjects for both left and right ears as a representation of ear variability across subjects, with analysis of sensitivity based on different variable combinations

From: Ear biometrics for patient identification in global health: a cross-sectional study to test the feasibility of a simplified algorithm

Left ear algorithm

Right ear algorithm

Variable

N

Mean SD

Variable

N

Mean SD

CR1

25

0.038

CR1

25

0.039

CR2

25

0.050

CR2

25

0.044

CR3

25

0.064

CR3

25

0.053

CR4

25

0.066

CR4

25

0.067

CR5

25

0.071

CR5

25

0.075

CR6

25

0.063

CR6

25

0.073

CR7

25

0.054

CR7

25

0.064

I1

25

0.204

I1

25

0.191

I2

25

0.886

I2

25

0.418

I3

25

1.205

I3

25

0.888

O1

25

0.353

O1

25

0.248

O2

25

0.073

O2

25

0.069

O3

25

0.080

O3

25

0.073

 

Mean

0.247

 

Mean

0.177

  

Overall mean SD = 0.212

   

Excluding I2 and I3

Mean

0.102

 

Mean

0.091

  

Overall mean SD = 0.096

   

Excluding I1, I2, I3, and O1

Mean

0.062

 

Mean

0.062

  

Overall mean SD = 0.062

   

Curvature only (C R 1–C R 7)

Mean

0.058

 

Mean

0.059

  

Overall mean SD = 0.059

   
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BMC Research Notes

ISSN: 1756-0500

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