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Merge pull request #146 from zwx8981/main
add UNIQUE
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"""LIQE Model | ||
github repo link: https://github.com/zwx8981/UNIQUE | ||
Cite as: | ||
@article{zhang2021uncertainty, | ||
title = {Uncertainty-aware blind image quality assessment in the laboratory and wild}, | ||
author = {Zhang, Weixia and Ma, Kede and Zhai, Guangtao and Yang, Xiaokang}, | ||
journal = {IEEE Transactions on Image Processing}, | ||
volume = {30}, | ||
pages = {3474--3486}, | ||
month = {Mar.}, | ||
year = {2021} | ||
} | ||
""" | ||
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import torch | ||
import torchvision | ||
import torch.nn as nn | ||
import torch.nn.functional as F | ||
from pyiqa.utils.registry import ARCH_REGISTRY | ||
from pyiqa.archs.arch_util import load_pretrained_network | ||
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default_model_urls = { | ||
'mix': 'https://github.com/zwx8981/IQA-PyTorch/releases/download/Weights/UNIQUE.pt', | ||
} | ||
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class Normalize(nn.Module): | ||
def __init__(self, mean, std): | ||
super(Normalize, self).__init__() | ||
self.mean = torch.Tensor(mean) | ||
self.std = torch.Tensor(std) | ||
def forward(self, x): | ||
return (x - self.mean.type_as(x)[None ,: ,None ,None]) / self.std.type_as(x)[None ,: ,None ,None] | ||
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class BCNN(nn.Module): | ||
def __init__(self, thresh=1e-8, is_vec=True, input_dim=512): | ||
super(BCNN, self).__init__() | ||
self.thresh = thresh | ||
self.is_vec = is_vec | ||
self.output_dim = input_dim * input_dim | ||
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def _bilinearpool(self, x): | ||
batchSize, dim, h, w = x.data.shape | ||
x = x.reshape(batchSize, dim, h * w) | ||
x = 1. / (h * w) * x.bmm(x.transpose(1, 2)) | ||
return x | ||
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def _signed_sqrt(self, x): | ||
x = torch.mul(x.sign(), torch.sqrt(x.abs() + self.thresh)) | ||
return x | ||
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def _l2norm(self, x): | ||
x = nn.functional.normalize(x) | ||
return x | ||
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def forward(self, x): | ||
x = self._bilinearpool(x) | ||
x = self._signed_sqrt(x) | ||
if self.is_vec: | ||
x = x.view(x.size(0), -1) | ||
x = self._l2norm(x) | ||
return x | ||
@ARCH_REGISTRY.register() | ||
class UNIQUE(nn.Module): | ||
"""Full UNIQUE network. | ||
Args: | ||
- default_mean (list): Default mean value. | ||
- default_std (list): Default std value. | ||
""" | ||
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def __init__(self): | ||
super(UNIQUE, self).__init__() | ||
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self.backbone = torchvision.models.resnet34(pretrained=True) | ||
outdim = 2 | ||
self.representation = BCNN() | ||
self.fc = nn.Linear(512 * 512, outdim) | ||
self.preprocess = Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225]) | ||
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pretrained_model_path = default_model_urls['mix'] | ||
load_pretrained_network(self, pretrained_model_path, True) | ||
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def forward(self, x): | ||
r"""Compute IQA using UNIQUE model. | ||
Args: | ||
X: An input tensor with (N, C, H, W) shape. RGB channel order for colour images. | ||
Returns: | ||
Value of UNIQUE model. | ||
""" | ||
x = self.preprocess(x) | ||
x = self.backbone.conv1(x) | ||
x = self.backbone.bn1(x) | ||
x = self.backbone.relu(x) | ||
x = self.backbone.maxpool(x) | ||
x = self.backbone.layer1(x) | ||
x = self.backbone.layer2(x) | ||
x = self.backbone.layer3(x) | ||
x = self.backbone.layer4(x) | ||
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x = self.representation(x) | ||
x = self.fc(x) | ||
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mean = x[:, 0] | ||
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return mean |
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