Fixed a few spelling errors (open-mmlab#1656)

* 修复拼写错误

* Fix lint error

* Fix lint error

* Fix lint error

Author: rotorliu

mmseg/models/decode_heads/stdc_head.py

@@ -67,19 +67,19 @@ def losses(self, seg_logit, seg_label):
         boundary_targets_x4_up[
             boundary_targets_x4_up <= self.boundary_threshold] = 0
 
-        boudary_targets_pyramids = torch.stack(
+        boundary_targets_pyramids = torch.stack(
             (boundary_targets, boundary_targets_x2_up, boundary_targets_x4_up),
             dim=1)
 
-        boudary_targets_pyramids = boudary_targets_pyramids.squeeze(2)
-        boudary_targets_pyramid = F.conv2d(boudary_targets_pyramids,
-                                           self.fusion_kernel)
+        boundary_targets_pyramids = boundary_targets_pyramids.squeeze(2)
+        boundary_targets_pyramid = F.conv2d(boundary_targets_pyramids,
+                                            self.fusion_kernel)
 
-        boudary_targets_pyramid[
-            boudary_targets_pyramid > self.boundary_threshold] = 1
-        boudary_targets_pyramid[
-            boudary_targets_pyramid <= self.boundary_threshold] = 0
+        boundary_targets_pyramid[
+            boundary_targets_pyramid > self.boundary_threshold] = 1
+        boundary_targets_pyramid[
+            boundary_targets_pyramid <= self.boundary_threshold] = 0
 
         loss = super(STDCHead, self).losses(seg_logit,
-                                            boudary_targets_pyramid.long())
+                                            boundary_targets_pyramid.long())
         return loss