Preserve original points in `resample_segments` (#18051)

Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

ultralytics/utils/ops.py

@@ -625,8 +625,9 @@ def resample_segments(segments, n=1000):
     """
     for i, s in enumerate(segments):
         s = np.concatenate((s, s[0:1, :]), axis=0)
-        x = np.linspace(0, len(s) - 1, n)
+        x = np.linspace(0, len(s) - 1, n - len(s) if len(s) < n else n)
         xp = np.arange(len(s))
+        x = np.insert(x, np.searchsorted(x, xp), xp) if len(s) < n else x
         segments[i] = (
             np.concatenate([np.interp(x, xp, s[:, i]) for i in range(2)], dtype=np.float32).reshape(2, -1).T
         )  # segment xy