Skip to content

Commit

Permalink
Fix ConfusionMatrix scale vmin=0.0 (ultralytics#6638)
Browse files Browse the repository at this point in the history
Fix attempt for ultralytics#6626
  • Loading branch information
glenn-jocher authored and eladco committed Mar 10, 2022
1 parent 1d89d21 commit 2833070
Showing 1 changed file with 5 additions and 4 deletions.
9 changes: 5 additions & 4 deletions utils/metrics.py
Original file line number Diff line number Diff line change
Expand Up @@ -175,15 +175,16 @@ def plot(self, normalize=True, save_dir='', names=()):
try:
import seaborn as sn

array = self.matrix / ((self.matrix.sum(0).reshape(1, -1) + 1E-6) if normalize else 1) # normalize columns
array = self.matrix / ((self.matrix.sum(0).reshape(1, -1) + 1E-9) if normalize else 1) # normalize columns
array[array < 0.005] = np.nan # don't annotate (would appear as 0.00)

fig = plt.figure(figsize=(12, 9), tight_layout=True)
sn.set(font_scale=1.0 if self.nc < 50 else 0.8) # for label size
labels = (0 < len(names) < 99) and len(names) == self.nc # apply names to ticklabels
nc, nn = self.nc, len(names) # number of classes, names
sn.set(font_scale=1.0 if nc < 50 else 0.8) # for label size
labels = (0 < nn < 99) and (nn == nc) # apply names to ticklabels
with warnings.catch_warnings():
warnings.simplefilter('ignore') # suppress empty matrix RuntimeWarning: All-NaN slice encountered
sn.heatmap(array, annot=self.nc < 30, annot_kws={"size": 8}, cmap='Blues', fmt='.2f', square=True,
sn.heatmap(array, annot=nc < 30, annot_kws={"size": 8}, cmap='Blues', fmt='.2f', square=True, vmin=0.0,
xticklabels=names + ['background FP'] if labels else "auto",
yticklabels=names + ['background FN'] if labels else "auto").set_facecolor((1, 1, 1))
fig.axes[0].set_xlabel('True')
Expand Down

0 comments on commit 2833070

Please sign in to comment.