diff --git a/py360convert/e2p.py b/py360convert/e2p.py
index 1557ae5..96c09bb 100644
--- a/py360convert/e2p.py
+++ b/py360convert/e2p.py
@@ -14,7 +14,7 @@
 
 def e2p(
     e_img: NDArray[DType],
-    fov_deg: Union[float, int, tuple[float | int, float | int]],
+    fov_deg: Union[float, int, tuple[Union[float, int], Union[float, int]]],
     u_deg: float,
     v_deg: float,
     out_hw: tuple[int, int],
@@ -65,7 +65,18 @@ def e2p(
     u = -float(np.deg2rad(u_deg))
     v = float(np.deg2rad(v_deg))
     in_rot = float(np.deg2rad(in_rot_deg))
-    sampler = EquirecSampler.from_perspective(h_fov, v_fov, u, v, in_rot, h, w, order)
+    sampler = EquirecSampler.from_perspective(
+        h_fov,
+        v_fov,
+        u,
+        v,
+        in_rot,
+        h,
+        w,
+        out_hw[0],
+        out_hw[0],
+        order,
+    )
     pers_img = np.stack([sampler(e_img[..., i]) for i in range(e_img.shape[2])], axis=-1)
 
     return pers_img[..., 0] if squeeze else pers_img
diff --git a/py360convert/utils.py b/py360convert/utils.py
index 05648ac..6163b09 100644
--- a/py360convert/utils.py
+++ b/py360convert/utils.py
@@ -431,7 +431,9 @@ def from_cubemap(cls, face_w: int, h: int, w: int, order: int):
 
     @classmethod
     @lru_cache(_CACHE_SIZE)
-    def from_perspective(cls, h_fov: float, v_fov: float, u, v, in_rot: float, h: int, w: int, order: int):
+    def from_perspective(
+        cls, h_fov: float, v_fov: float, u, v, in_rot: float, in_h: int, in_w: int, out_h, out_w, order: int
+    ):
         """Construct a EquirecSampler from perspective specs.
 
         Parameters
@@ -446,16 +448,20 @@ def from_perspective(cls, h_fov: float, v_fov: float, u, v, in_rot: float, h: in
             Vertical viewing angle in radians
         in_rot: float
             Inplane rotation in radians.
-        h: int
+        in_h: int
             Height of input equirec image.
-        w: int
+        in_w: int
             Width of input equirec image.
+        out_h: int
+            Height of output perspective image.
+        out_w: int
+            Width of output perspective image.
         order: int
             The order of the spline interpolation. See ``scipy.ndimage.map_coordinates``.
         """
-        xyz = xyzpers(h_fov, v_fov, u, v, (h, w), in_rot)
+        xyz = xyzpers(h_fov, v_fov, u, v, (out_h, out_w), in_rot)
         u, v = xyz2uv(xyz)
-        coor_x, coor_y = uv2coor(u, v, h, w)
+        coor_x, coor_y = uv2coor(u, v, in_h, in_w)
         return cls(coor_x, coor_y, order=order)