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Automatic crack detection method for loaded coal in vibration failure process

Fig 11

Examples of images after hysteresis threshold with different parameters.

(A) The original image. (B) Min = 10, max = 60, length = 1. (C) Min = 10, max = 60, length = 5. (D) Min = 10, max = 60, length = 10.

Fig 11

doi: https://doi.org/10.1371/journal.pone.0185750.g011