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Acta Photonica Sinica, Volume. 53, Issue 9, 0910004(2024)

OCT Internal and External Fingerprint Extraction Method Based on Soft Label

Yilong ZHANG... Shengming ZHU, Haixia WANG*, Haohao SUN and Rui YAN |Show fewer author(s)
Author Affiliations
  • School of Computer and Science Technology， Zhejiang University of Technology， Hangzhou 310000， China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (14)
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    References (32)
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    Figures & Tables(14)
    Optical schematic of SD-OCT system［27］

    Fig. 1. Optical schematic of SD-OCT system［27］

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    OCT fingerprint data

    Fig. 2. OCT fingerprint data

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    Overall process of the algorithm

    Fig. 3. Overall process of the algorithm

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    Labeling process

    Fig. 4. Labeling process

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    Coordinate attention block［14］

    Fig. 5. Coordinate attention block［14］

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    Network architecture of SLCA-UNet

    Fig. 6. Network architecture of SLCA-UNet

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    External fingerprint images generated by different algorithms

    Fig. 7. External fingerprint images generated by different algorithms

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    Internal fingerprint images generated by different algorithms

    Fig. 8. Internal fingerprint images generated by different algorithms

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    The DET curves of external and internal fingerprint

    Fig. 9. The DET curves of external and internal fingerprint

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    • Table 1. Fingerprint reconstruction steps based on soft Label

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      Table 1. Fingerprint reconstruction steps based on soft Label

      Fingerprint reconstruction step based on the soft Label
      Input. B-scan： I（x，y，z），the predict result of the stratum corneum layer and viable epidermal layer： Pexternal（x，y，z），Pinternal（x，y）
      Output. External fingerprint and Internal fingerprint
      Step1. x=1 800，y=500，z=1 400，t=1
      Step2. Initialize：External fingerprint =zeros（［z，x］），Internal fingerprint=zeros（［z，x］）
      Step3. for t in range（1，z+1）：（1-1400 B-scan image）
      Step4. finger_external［t-1，：］=sum（I（：，：，t）*Pexternal（：，：，t），axis=0）/（sum（Pexternal（：，：，t），axis=0））
      Step5. finger_internal［t-1，：］=sum（I（：，：，t）*Pinterna（：，：，t），axis=0）/（sum（Pinternal（：，：，t），axis=0））
      Step6. t=t+1 （process the next B-scan image）
      Step7. External fingerprintl=normalize（External fingerprint）， the external fingerprint was normalized to 0 to 255
      Step8. Internal fingerprint=normalize（Internal fingerprint）， the internal fingerprint was normalized to 0 to 255

    • Table 2. NFIQ scores of different algorithms

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      Table 2. NFIQ scores of different algorithms

      Extraction methodFingerprintMean values of NFIQ 2.0 score
      ZAM 1External fingerprint18
      Internal fingerprint36
      ZAM 2External fingerprint28
      Internal fingerprint35
      ZAM 3External fingerprint14
      Internal fingerprint35
      U-NetExternal fingerprint31
      Internal fingerprint41
      GradientExternal fingerprint32
      Internal fingerprint42
      SLCA-UNetExternal fingerprint35
      Internal fingerprint47

    • Table 3. Time comparison of different algorithms

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      Table 3. Time comparison of different algorithms

      Extraction methodDenoising time/sExtraction time/s
      ZAM［17］6 00091
      U-Net［28］0127
      Gradient［1］6 000580
      SLCA-UNet0140

    • Table 4. Results of the ablation experiments of each module

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      Table 4. Results of the ablation experiments of each module

      GroupMethodNFIQ 2.0 scoreEER scoreExtraction time/s
      External fingerprintInternal fingerprintExternal fingerprintInternal fingerprint
      1U-Net31411.1%1.5%127
      2UNet+Coordinate attention31441.2%1.2%140
      3U-Net+Soft Label34460.9%0.9%127
      4Our method（UNet+Soft Label+Coordinate attention）35470.8%0.8%140

    • Table 5. Experimental results for the contour boundaries are smooth or not

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      Table 5. Experimental results for the contour boundaries are smooth or not

      GroupMethodNFIQ 2.0 scoreEER score
      External fingerprintInternal fingerprintExternal fingerprintInternal fingerprint
      1Smooth contour boundary Label （our method）35470.8%0.8%
      2Unsmooth contour boundary Label253522.5%0.9%
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    Yilong ZHANG, Shengming ZHU, Haixia WANG, Haohao SUN, Rui YAN. OCT Internal and External Fingerprint Extraction Method Based on Soft Label[J]. Acta Photonica Sinica, 2024, 53(9): 0910004

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    Paper Information

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    Received: Jan. 25, 2024

    Accepted: Apr. 28, 2024

    Published Online: Nov. 13, 2024

    The Author Email: WANG Haixia (hxwang@zjut.edu.cn)

    DOI:10.3788/gzxb20245309.0910004

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology