diff --git a/apps/postprocess/vertices_to_bounds.py b/apps/postprocess/vertices_to_bounds.py
new file mode 100644
index 0000000..2467bb5
--- /dev/null
+++ b/apps/postprocess/vertices_to_bounds.py
@@ -0,0 +1,24 @@
+import os
+import numpy as np
+from tqdm import tqdm
+from easymocap.mytools.reader import read_json
+from os.path import join
+
+if __name__ == '__main__':
+    import argparse
+    parser = argparse.ArgumentParser()
+    parser.add_argument('path', type=str)
+    parser.add_argument('--debug', action='store_true')
+    args = parser.parse_args()
+
+    verticesnames = os.listdir(args.path)
+    bounds = []
+    for vertname in tqdm(verticesnames):
+        vertices = read_json(join(args.path, vertname))
+        bounds_frame = []
+        for data in vertices:
+            verts = np.array(data['vertices'])
+            bound = np.array([verts.min(axis=0), verts.max(axis=0)])
+            bounds_frame.append(bound)
+        bounds.append(bounds_frame)
+    np.save('test.npy', np.stack(bounds))
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