Modification of multibox-The operation is applied on Conv4-3 (amdegroot#70)

Author: astorfi

ssd.py

@@ -165,7 +165,7 @@ def add_extras(cfg, i, batch_norm=False):
 def multibox(vgg, extra_layers, cfg, num_classes):
     loc_layers = []
     conf_layers = []
-    vgg_source = [24, -2]
+    vgg_source = [21, -2]
     for k, v in enumerate(vgg_source):
         loc_layers += [nn.Conv2d(vgg[v].out_channels,
                                  cfg[k] * 4, kernel_size=3, padding=1)]