Fix cv2.imwrite on non-ASCII paths (#7139)

* Fix imwrite on non-ASCII paths

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Update general.py

* Update __init__.py

* Update __init__.py

* Update datasets.py

* Update hubconf.py

* Update detect.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update general.py

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

utils/general.py

@@ -904,5 +904,20 @@ def increment_path(path, exist_ok=False, sep='', mkdir=False):
     return path
 
 
-# Variables
+# OpenCV Chinese-friendly functions ------------------------------------------------------------------------------------
+def imread(path):
+    return cv2.imdecode(np.fromfile(path, np.uint8), cv2.IMREAD_COLOR)
+
+
+def imwrite(path, im):
+    try:
+        cv2.imencode(Path(path).suffix, im)[1].tofile(path)
+        return True
+    except Exception:
+        return False
+
+
+cv2.imread, cv2.imwrite = imread, imwrite  # redefine
+
+# Variables ------------------------------------------------------------------------------------------------------------
 NCOLS = 0 if is_docker() else shutil.get_terminal_size().columns  # terminal window size for tqdm