fixed bug in graphicsItems/ImageItem.py: degenerate images (max==min) would raise exception in getHistogram()

2018-10-10 10:29:16 -04:00 · 2018-10-10 10:29:16 -04:00 · d261c2f0f2
commit d261c2f0f2
parent 574c5f3a47
1 changed files with 71 additions and 68 deletions
--- a/pyqtgraph/graphicsItems/ImageItem.py
+++ b/pyqtgraph/graphicsItems/ImageItem.py
@ -487,6 +487,9 @@ class ImageItem(GraphicsObject):
        if bins == 'auto':
            mn = np.nanmin(stepData)
            mx = np.nanmax(stepData)
+            if mx == mn:
+                # degenerate image, arange will fail
+                mx += 1
            if np.isnan(mn) or np.isnan(mx):
                # the data are all-nan
                return None, None