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modified to calculate performance correcty when ground truths do not … #77

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30 changes: 21 additions & 9 deletions train/IOUEval.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@ def reset(self):
self.per_class_acc = np.zeros(self.nClasses, dtype=np.float32)
self.per_class_iu = np.zeros(self.nClasses, dtype=np.float32)
self.mIOU = 0
self.batchCount = 1
self.batchCount = 0

def fast_hist(self, a, b):
k = (a >= 0) & (a < self.nClasses)
Expand All @@ -24,11 +24,21 @@ def compute_hist(self, predict, gth):
return hist

def addBatch(self, predict, gth):
predict = predict.cpu().numpy().flatten()
gth = gth.cpu().numpy().flatten()
if isinstance(predict, np.ndarray):
predict = predict.flatten()
gth = gth.flatten()
elif isinstance(predict, torch.Tensor):
predict = predict.cpu().numpy().flatten()
gth = gth.cpu().numpy().flatten()

epsilon = 0.00000001
if self.batchCount == 0:
self.hist = self.compute_hist(predict, gth)
else:
self.hist += self.compute_hist(predict, gth)
hist = self.compute_hist(predict, gth)
# hist(0) : TP + FN
# hist(1) : TP + FP
overall_acc = np.diag(hist).sum() / (hist.sum() + epsilon)
per_class_acc = np.diag(hist) / (hist.sum(1) + epsilon)
per_class_iu = np.diag(hist) / (hist.sum(1) + hist.sum(0) - np.diag(hist) + epsilon)
Expand All @@ -39,11 +49,13 @@ def addBatch(self, predict, gth):
self.per_class_iu += per_class_iu
self.mIOU += mIou
self.batchCount += 1
return hist

def getMetric(self):
overall_acc = self.overall_acc/self.batchCount
per_class_acc = self.per_class_acc / self.batchCount
per_class_iu = self.per_class_iu / self.batchCount
mIOU = self.mIOU / self.batchCount

return overall_acc, per_class_acc, per_class_iu, mIOU
epsilon = 0.00000001
overall_acc = np.diag(self.hist).sum() / (self.hist.sum() + epsilon)
per_class_acc = np.diag(self.hist) / (self.hist.sum(1) + epsilon)
per_class_iu = np.diag(self.hist) / (self.hist.sum(1) + self.hist.sum(0) - np.diag(self.hist) + epsilon)
mIOU = np.nanmean(per_class_iu)
return overall_acc, per_class_acc, per_class_iu, mIOU