Last active
September 6, 2020 11:02
-
-
Save rishab-sharma/74f09d7e2364a85d3a562e976ae09495 to your computer and use it in GitHub Desktop.
Listening to the Pixels - VAN
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import torch | |
import torch.nn as nn | |
import torch.nn.functional as F | |
import torchvision | |
from functools import partial | |
class DilatedResnet18MaxPool(nn.Module): | |
def __init__(self, fc_dim=64, conv_size=3): | |
super(DilatedResnet18MaxPool, self).__init__() | |
orig_resnet = torchvision.models.resnet18(pretrained=True) | |
orig_resnet.layer4.apply( | |
partial(self._nostride_dilate, dilate=2)) | |
self.features = nn.Sequential( | |
*list(orig_resnet.children())[:-2]) | |
self.fc = nn.Conv2d( | |
512, fc_dim, kernel_size=conv_size, padding=conv_size//2) | |
def _nostride_dilate(self, m, dilate): | |
classname = m.__class__.__name__ | |
if classname.find('Conv') != -1: | |
# the convolution with stride | |
if m.stride == (2, 2): | |
m.stride = (1, 1) | |
if m.kernel_size == (3, 3): | |
m.dilation = (dilate//2, dilate//2) | |
m.padding = (dilate//2, dilate//2) | |
# other convoluions | |
else: | |
if m.kernel_size == (3, 3): | |
m.dilation = (dilate, dilate) | |
m.padding = (dilate, dilate) | |
def forward(self, x, pool=True): | |
x = self.features(x) | |
x = self.fc(x) | |
if not pool: | |
return x | |
x = F.adaptive_max_pool2d(x, 1) | |
x = x.view(x.size(0), x.size(1)) | |
return x | |
def forward_multi(self, x, pool=True): | |
(B, C, T, H, W) = x.size() | |
x = x.permute(0, 2, 1, 3, 4).contiguous() | |
x = x.view(B*T, C, H, W) | |
x = self.features(x) | |
x = self.fc(x) | |
(_, C, H, W) = x.size() | |
x = x.view(B, T, C, H, W) | |
x = x.permute(0, 2, 1, 3, 4) | |
if not pool: | |
return x | |
x = F.adaptive_max_pool3d(x, 1) | |
x = x.view(B, C) | |
return x |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment