forked from mrq/DL-Art-School
93 lines
3.6 KiB
Python
93 lines
3.6 KiB
Python
import torch
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import torchvision
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from torch.nn.functional import interpolate
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from torch.utils.data import DataLoader
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from torchvision import transforms
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from tqdm import tqdm
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import trainer.eval.evaluator as evaluator
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from data import create_dataset
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from models.vqvae.kmeans_mask_producer import UResnetMaskProducer
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from utils.util import opt_get
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class CategorizationLossEvaluator(evaluator.Evaluator):
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def __init__(self, model, opt_eval, env):
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super().__init__(model, opt_eval, env)
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self.batch_sz = opt_eval['batch_size']
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assert self.batch_sz is not None
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normalize = transforms.Normalize(mean=[0.485, 0.456, 0.406],
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std=[0.229, 0.224, 0.225])
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self.dataset = create_dataset(opt_eval['dataset'])
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self.dataloader = DataLoader(self.dataset, self.batch_sz, shuffle=False, num_workers=4)
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self.gen_output_index = opt_eval['gen_index'] if 'gen_index' in opt_eval.keys() else 0
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self.masking = opt_get(opt_eval, ['masking'], False)
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if self.masking:
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self.mask_producer = UResnetMaskProducer(pretrained_uresnet_path= '../experiments/train_imagenet_pixpro_resnet/models/66500_generator.pth',
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kmeans_centroid_path='../experiments/k_means_uresnet_imagenet_256.pth',
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mask_scales=[.03125, .0625, .125, .25, .5, 1.0],
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tail_dim=256).to('cuda')
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def accuracy(self, output, target, topk=(1,)):
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"""Computes the accuracy over the k top predictions for the specified values of k"""
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with torch.no_grad():
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maxk = max(topk)
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batch_size = target.size(0)
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_, pred = output.topk(maxk, 1, True, True)
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pred = pred.t()
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correct = pred.eq(target[None])
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res = []
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for k in topk:
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correct_k = correct[:k].flatten().sum(dtype=torch.float32)
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res.append(correct_k * (100.0 / batch_size))
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return res
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def perform_eval(self):
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counter = 0.0
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ce_loss = 0.0
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top_5_acc = 0.0
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top_1_acc = 0.0
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self.model.eval()
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with torch.no_grad():
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for batch in tqdm(self.dataloader):
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hq, labels = batch['hq'], batch['labels']
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hq = hq.to(self.env['device'])
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labels = labels.to(self.env['device'])
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if self.masking:
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masks = self.mask_producer(hq)
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logits = self.model(hq, masks)
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else:
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logits = self.model(hq)
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if not isinstance(logits, list) and not isinstance(logits, tuple):
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logits = [logits]
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logits = logits[self.gen_output_index]
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ce_loss += torch.nn.functional.cross_entropy(logits, labels).detach()
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t1, t5 = self.accuracy(logits, labels, (1, 5))
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top_1_acc += t1.detach()
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top_5_acc += t5.detach()
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counter += len(hq) / self.batch_sz
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self.model.train()
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return {"val_cross_entropy": ce_loss / counter,
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"top_5_accuracy": top_5_acc / counter,
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"top_1_accuracy": top_1_acc / counter }
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if __name__ == '__main__':
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from torchvision.models import resnet50
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model = resnet50(pretrained=True).to('cuda')
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opt = {
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'batch_size': 128,
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'gen_index': 0,
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'masking': False
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}
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env = {
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'device': 'cuda',
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}
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eval = CategorizationLossEvaluator(model, opt, env)
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print(eval.perform_eval())
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