【语义分割】Dice's coefficient 实现

shaoheshaohe

Dice's coefficient　计算过程如下：






X:原图　Y:预测图


smooth = 1.
def dice_coef(y_true, y_pred):


    y_true_f = K.flatten(y_true)


    y_pred_f = K.flatten(y_pred)


    intersection = K.sum(y_true_f * y_pred_f)


    return (2. * intersection + smooth) / (K.sum(y_true_f * y_true_f) + K.sum(y_pred_f * y_pred_f) + smooth)


def dice_coef_loss(y_true, y_pred):


    return 1. - dice_coef(y_true, y_pred)
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