Add results.save(save_dir='path', exist_ok=False) (#9617)

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

models/common.py

@@ -775,12 +775,12 @@ class Detections:
     def show(self, labels=True):
         self._run(show=True, labels=labels)  # show results
 
-    def save(self, labels=True, save_dir='runs/detect/exp'):
-        save_dir = increment_path(save_dir, exist_ok=save_dir != 'runs/detect/exp', mkdir=True)  # increment save_dir
+    def save(self, labels=True, save_dir='runs/detect/exp', exist_ok=False):
+        save_dir = increment_path(save_dir, exist_ok, mkdir=True)  # increment save_dir
         self._run(save=True, labels=labels, save_dir=save_dir)  # save results
 
-    def crop(self, save=True, save_dir='runs/detect/exp'):
-        save_dir = increment_path(save_dir, exist_ok=save_dir != 'runs/detect/exp', mkdir=True) if save else None
+    def crop(self, save=True, save_dir='runs/detect/exp', exist_ok=False):
+        save_dir = increment_path(save_dir, exist_ok, mkdir=True) if save else None
         return self._run(crop=True, save=save, save_dir=save_dir)  # crop results
 
     def render(self, labels=True):