diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
index 5369eadbdefd..7e00a1edb73b 100644
--- a/lib/matplotlib/axes/_axes.py
+++ b/lib/matplotlib/axes/_axes.py
@@ -5718,6 +5718,18 @@ def imshow(self, X, cmap=None, norm=None, *, aspect=None,
`~matplotlib.pyplot.imshow` expects RGB images adopting the straight
(unassociated) alpha representation.
"""
+ if not isinstance(vmax, (int, float)):
+ try:
+ vmax = vmax.to_tuple()[0]
+ except AttributeError:
+ raise AttributeError("vmax must be a scalar or a 1-element array")
+
+ if not isinstance(vmin, (int, float)):
+ try:
+ vmin = vmin.to_tuple()[0]
+ except AttributeError:
+ raise AttributeError("vmin must be a scalar or a 1-element array")
+
if aspect is None:
aspect = mpl.rcParams['image.aspect']
self.set_aspect(aspect)
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