diff --git a/toolkit/datasets/video.py b/toolkit/datasets/video.py
index 12f9f76d..9063a1e9 100644
--- a/toolkit/datasets/video.py
+++ b/toolkit/datasets/video.py
@@ -15,7 +15,7 @@ def __init__(self, name, root, video_dir, init_rect, img_names,
         self.gt_traj = gt_rect
         self.attr = attr
         self.pred_trajs = {}
-        self.img_names = [os.path.join(root, x) for x in img_names]
+        self.img_names = [os.path.join(os.path.abspath(root), os.path.abspath(x)) for x in img_names]
         self.imgs = None
 
         if load_img:
diff --git a/toolkit/datasets/vot.py b/toolkit/datasets/vot.py
index 09dc1a4d..f66d7c17 100644
--- a/toolkit/datasets/vot.py
+++ b/toolkit/datasets/vot.py
@@ -50,7 +50,7 @@ def __init__(self, name, root, video_dir, init_rect, img_names, gt_rect,
 
         self.tag_names = list(self.tags.keys())
         if not load_img:
-            img_name = os.path.join(root, self.img_names[0])
+            img_name = os.path.join(os.path.abspath(root), os.path.abspath(self.img_names[0]))
             img = np.array(Image.open(img_name), np.uint8)
             self.width = img.shape[1]
             self.height = img.shape[0]