Fix Y-axis flip in SimplePerspectiveCamera

emage_utils/npz2pose.py

@@ -46,8 +46,10 @@ class SimplePerspectiveCamera:
         
         cx, cy = self.principal_point[0]
         
+        height = self.image_size[0][0]
+        
         x_screen = fx * x / z + cx
-        y_screen = fy * y / z + cy
+        y_screen = height - (fy * y / z + cy)
         
         return torch.stack([x_screen, y_screen], dim=-1)