Yuehua Huo, Weiqiang Fan. Face Recognition Method Under Complex Light Conditions in Coal Mines[J]. Laser & Optoelectronics Progress, 2019, 56(1): 011003
- Laser & Optoelectronics Progress
- Vol. 56, Issue 1, 011003 (2019)
Fig. 1. Flow chart of face recognition process
Fig. 2. Comparison before and after low-frequency signal equalization processing. (a) Original image and corresponding histogram; (b) image effect and corresponding histogram after low-frequency equalization processing
![High-frequency processingeffects of downhole face images by different algorithms. (a) Original image; (b) traditional wavelet algorithm; (c) Log_Gabor algorithm; (d) bilateral filtered multiscale Retinex algorithm;(e) algorithm in Ref.[16]; (f) proposed algorithm](/Images/icon/loading.gif){kind=icon}
Fig. 3. High-frequency processingeffects of downhole face images by different algorithms. (a) Original image; (b) traditional wavelet algorithm; (c) Log_Gabor algorithm; (d) bilateral filtered multiscale Retinex algorithm;(e) algorithm in Ref.[16]; (f) proposed algorithm
Fig. 4. Partial sampling images in experiment
Fig. 5. Post-texture feature maps described by LBP
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Table 1. Parameter setting in experiment
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Table 2. Recognition rates by different recognition methods%
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