From fa470ebceffe66fc1ae33daf5921457016ddb8e5 Mon Sep 17 00:00:00 2001
From: Miguel Mendez <miguelmndez@gmail.com>
Date: Sun, 24 May 2020 11:45:21 +0200
Subject: [PATCH] Force copy of input img (#297)

---
 mmcv/image/photometric.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mmcv/image/photometric.py b/mmcv/image/photometric.py
index a7b345a76..79d50cd58 100644
--- a/mmcv/image/photometric.py
+++ b/mmcv/image/photometric.py
@@ -14,7 +14,7 @@ def imnormalize(img, mean, std, to_rgb=True):
     Returns:
         ndarray: The normalized image.
     """
-    img = np.float32(img) if img.dtype != np.float32 else img.copy()
+    img = img.copy().astype(np.float32)
     return imnormalize_(img, mean, std, to_rgb)