Skip HSV augmentation when hyperparameters are [0, 0, 0] (#3686)

utils/datasets.py

@@ -632,6 +632,7 @@ def load_image(self, index):
 
 
 def augment_hsv(img, hgain=0.5, sgain=0.5, vgain=0.5):
+    if hgain or sgain or vgain:
         r = np.random.uniform(-1, 1, 3) * [hgain, sgain, vgain] + 1  # random gains
         hue, sat, val = cv2.split(cv2.cvtColor(img, cv2.COLOR_BGR2HSV))
         dtype = img.dtype  # uint8