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Update metrics.py #200

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Update metrics.py #200

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12 changes: 2 additions & 10 deletions ptsemseg/metrics.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,23 +2,15 @@
# https://github.com/wkentaro/pytorch-fcn/blob/master/torchfcn/utils.py

import numpy as np

from sklearn.metrics import confusion_matrix

class runningScore(object):
def __init__(self, n_classes):
self.n_classes = n_classes
self.confusion_matrix = np.zeros((n_classes, n_classes))

def _fast_hist(self, label_true, label_pred, n_class):
mask = (label_true >= 0) & (label_true < n_class)
hist = np.bincount(
n_class * label_true[mask].astype(int) + label_pred[mask], minlength=n_class ** 2
).reshape(n_class, n_class)
return hist

def update(self, label_trues, label_preds):
for lt, lp in zip(label_trues, label_preds):
self.confusion_matrix += self._fast_hist(lt.flatten(), lp.flatten(), self.n_classes)
self.confusion_matrix += confusion_matrix(label_trues.flatten(), label_preds.flatten(), list(range(self.n_classes)))

def get_scores(self):
"""Returns accuracy score evaluation result.
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