updates

models.py

@@ -120,6 +120,15 @@ class Swish(nn.Module):
         return x * torch.sigmoid(x)
 
 
+class Mish(nn.Module):  # https://github.com/digantamisra98/Mish
+    # Applies the mish function element-wise: mish(x) = x * tanh(softplus(x)) = x * tanh(ln(1 + exp(x)))
+    def __init__(self):
+        super().__init__()
+
+    def forward(self, x):
+        return x * torch.tanh(F.softplus(x))
+
+
 class YOLOLayer(nn.Module):
     def __init__(self, anchors, nc, img_size, yolo_index, arc):
         super(YOLOLayer, self).__init__()