63 lines
2.5 KiB
Python
63 lines
2.5 KiB
Python
import torch
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import models.archs.SRResNet_arch as SRResNet_arch
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import models.archs.discriminator_vgg_arch as SRGAN_arch
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import models.archs.RRDBNet_arch as RRDBNet_arch
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import models.archs.EDVR_arch as EDVR_arch
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import math
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# Generator
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def define_G(opt):
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opt_net = opt['network_G']
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which_model = opt_net['which_model_G']
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scale = opt['scale']
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# image restoration
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if which_model == 'MSRResNet':
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netG = SRResNet_arch.MSRResNet(in_nc=opt_net['in_nc'], out_nc=opt_net['out_nc'],
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nf=opt_net['nf'], nb=opt_net['nb'], upscale=opt_net['scale'])
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elif which_model == 'RRDBNet':
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# RRDB does scaling in two steps, so take the sqrt of the scale we actually want to achieve and feed it to RRDB.
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scale_per_step = math.sqrt(scale)
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netG = RRDBNet_arch.RRDBNet(in_nc=opt_net['in_nc'], out_nc=opt_net['out_nc'],
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nf=opt_net['nf'], nb=opt_net['nb'], interpolation_scale_factor=scale_per_step)
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# video restoration
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elif which_model == 'EDVR':
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netG = EDVR_arch.EDVR(nf=opt_net['nf'], nframes=opt_net['nframes'],
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groups=opt_net['groups'], front_RBs=opt_net['front_RBs'],
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back_RBs=opt_net['back_RBs'], center=opt_net['center'],
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predeblur=opt_net['predeblur'], HR_in=opt_net['HR_in'],
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w_TSA=opt_net['w_TSA'])
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else:
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raise NotImplementedError('Generator model [{:s}] not recognized'.format(which_model))
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return netG
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# Discriminator
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def define_D(opt):
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img_sz = opt['datasets']['train']['target_size']
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opt_net = opt['network_D']
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which_model = opt_net['which_model_D']
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if which_model == 'discriminator_vgg_128':
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netD = SRGAN_arch.Discriminator_VGG_128(in_nc=opt_net['in_nc'], nf=opt_net['nf'], input_img_factor=img_sz / 128)
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else:
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raise NotImplementedError('Discriminator model [{:s}] not recognized'.format(which_model))
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return netD
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# Define network used for perceptual loss
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def define_F(opt, use_bn=False):
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gpu_ids = opt['gpu_ids']
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device = torch.device('cuda' if gpu_ids else 'cpu')
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# PyTorch pretrained VGG19-54, before ReLU.
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if use_bn:
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feature_layer = 49
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else:
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feature_layer = 34
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netF = SRGAN_arch.VGGFeatureExtractor(feature_layer=feature_layer, use_bn=use_bn,
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use_input_norm=True, device=device)
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netF.eval() # No need to train
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return netF
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