405 lines
16 KiB
Python
405 lines
16 KiB
Python
import json
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import os
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import random
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import shutil
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import time
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from clip import clip
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import numpy as np
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import torch.backends.cudnn as cudnn
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import torch.nn as nn
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import torch.optim
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from data.prepare_data_shot2 import generate_dataloader # Prepare the data and dataloader
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from opts import opts # The options for the project
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from trainer_1_17 import train # For the training process
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from trainer_1_17 import validate # For the validate (test) process
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from models.DomainClassifierTarget import DClassifierForTarget
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from models.DomainClassifierSource import DClassifierForSource
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from engine import partial_model
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from clip.model import ModifiedResNet, VisionTransformer
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from datasets import build_dataset
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from datasets.utils import build_data_loader
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import torchvision.transforms as transforms
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import math
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import shutil
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best_prec1 = 0
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class Weight_Adapter(nn.Module):
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def __init__(self, n_input, n_output,adapter_weights):
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super().__init__()
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self.linear1 = nn.Linear(n_input, n_output, bias=False)
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self.linear1.weight.data = adapter_weights # Initialize linear layer weights
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def forward(self, x):
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x = self.linear1(x.float())
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return x
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class Adapter(nn.Module):
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def __init__(self, n_input,n_output):
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super().__init__()
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self.residual_ratio = 0.2
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self.linear1 = nn.Linear(n_input, n_output, bias=False)
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# self.linear1.weight.data = adapter_weights # Initialize linear layer weights
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self.relu=nn.ReLU()
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def forward(self, x):
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a=x
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x = self.linear1(x.float())
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x=self.relu(x)
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# x = self.residual_ratio * x + (1 - self.residual_ratio) * a
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return x
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def zeroshot_classifier(classname, templates, CLIP_Text):
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with torch.no_grad():
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classname = classname.replace('_', ' ')
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str_prompts = [template.format(classname) for template in templates]
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prompts = torch.cat([clip.tokenize(p) for p in str_prompts]).cuda()
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features, eot_indices = CLIP_Text(prompts)
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return features, eot_indices
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class AverageMeter(object):
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"""Computes and stores the average and current value"""
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def __init__(self):
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self.reset()
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def reset(self):
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self.val = 0
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self.avg = 0
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self.sum = 0
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self.count = 0
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def update(self, val, n=1):
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self.val = val
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self.sum += val * n
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self.count += n
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self.avg = self.sum / self.count
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def accuracy(output, target, topk=(1,)):
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"""Computes the precision@k for the specified values of k"""
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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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_2, pred2 = output.topk(1, 1, True, True)
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a = target.view(1, -1)
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correct = pred.eq(target.view(1, -1).expand_as(pred))
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# print(correct)
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res = []
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for k in topk:
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correct_k = correct[:k].contiguous().view(-1).float().sum(0, keepdim=True)
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res.append(correct_k.mul_(100.0 / batch_size))
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return res
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def all_classifier(classnames, templates, model):
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with torch.no_grad():
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zeroshot_weights = []
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for classname in classnames:
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classname = classname.replace('_', ' ')
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texts = [template.format(classname) for template in templates] # format with class
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texts = clip.tokenize(texts).cuda() # tokenizeclip.tokenize向量化文字
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class_embeddings = model.encode_text(texts) # embed with text encoder
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class_embeddings /= class_embeddings.norm(dim=-1, keepdim=True)
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class_embedding = class_embeddings.mean(dim=0)
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class_embedding /= class_embedding.norm()
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zeroshot_weights.append(class_embedding)
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zeroshot_weights = torch.stack(zeroshot_weights, dim=1).cuda()
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return zeroshot_weights
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def validate_train(classnames, templates,val_loader, model, args, zero_shots, criterion,
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optimizer, scheduler, alpha, beta, gama, CLIP_Text, CLIP_Image,Image_Encoder,Text_Encoder,adapter):
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global best_target_acc
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Compu1_acc = AverageMeter()
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losses = AverageMeter()
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CLIP_Text.eval()
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CLIP_Image.eval()
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Image_Encoder.eval()
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Text_Encoder.eval()
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adapter.eval()
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logit_scale = 4.60517
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logit_scale = math.exp(logit_scale)
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# switch to evaluate mode
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for i, (image, label) in enumerate(val_loader):
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image = image.cuda()
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label = label.cuda()
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zeroshot_weights = []
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for j in range(len(label)):
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features, eot_indices = zeroshot_classifier(classnames[label[j]], templates, CLIP_Text)
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with torch.no_grad():
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class_embeddings = Text_Encoder(features, eot_indices)
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class_embeddings = class_embeddings / class_embeddings.norm(dim=-1, keepdim=True)
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class_embedding = class_embeddings.mean(dim=0)
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class_embedding = class_embedding / class_embedding.norm()
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class_embedding = class_embedding / class_embedding.norm(dim=-1, keepdim=True)
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zeroshot_weights.append(class_embedding)
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zeroshot_weights = torch.stack(zeroshot_weights, dim=1).cuda()
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input_source = zeroshot_weights
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input_source = input_source.T
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input_target = image.cuda()
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target_target = label.cuda()
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target_source = label.cuda()
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input_target_clip = model.encode_image(input_target)
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# clip图片编码器
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with torch.no_grad():
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input_target_temp = CLIP_Image(input_target)
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input_target_add = Image_Encoder(input_target_temp)
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output_source = adapter(input_source) * logit_scale
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output_target = adapter(input_target_add) * logit_scale
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# 3
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loss_source = criterion(output_source[:, :len(classnames)], target_source)
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loss_target = criterion(output_target[:, len(classnames):], target_target)
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# measure accuracy and record loss
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prec1_source, _ = accuracy(output_source.data[:, :len(classnames)], target_source, topk=(1, 5))
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prec1_target, _ = accuracy(output_target.data[:, len(classnames):], target_target, topk=(1, 5))
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# 2
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logits2 =100.* input_target_clip.float() @ zero_shots.float()
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# 3
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logits3 = output_target[:, len(classnames):]
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# compu1:1-2+3:
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compu1 = beta*logits2 + gama * logits3
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compu1_acc = accuracy(compu1, target_target, topk=(1, 5))
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loss = criterion(compu1, target_target)
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Compu1_acc.update(compu1_acc[0].item(), image.size(0))
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losses.update(loss.item(), image.size(0))
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print('loss:', loss.item())
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print(i, '/', len(val_loader))
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print('Compu1_acc:', Compu1_acc.val, 'alpha:', alpha.item(), 'beta:', beta.item(), 'gama:', gama.item())
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optimizer.zero_grad()
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loss.backward()
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optimizer.step()
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scheduler.step()
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print('Compu1_acc.avg', Compu1_acc.avg, 'alpha:', alpha.item(), 'beta:', beta.item(), 'gama:', gama.item(),
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'losses.avg', losses.avg)
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return Compu1_acc.avg, alpha.item(), beta.item(), gama.item()
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def main():
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seed = 2023
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random.seed(seed)
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os.environ['PYTHONHASHSEED'] = str(seed)
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np.random.seed(seed)
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torch.manual_seed(seed)
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torch.cuda.manual_seed(seed)
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torch.cuda.manual_seed_all(seed)
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global args, best_prec1
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current_epoch = 0
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args = opts()
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clip.available_models()
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model, preprocess = clip.load(args.name)
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# model = model.cuda()
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model.float()
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if os.path.exists(args.filename_dir):
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print('exist')
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else:
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os.makedirs(args.filename_dir)
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filename=args.filename_dir+args.dataset_name+'.txt'
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if os.path.exists(filename):
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print(filename + " exist!")
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else:
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print("create " + filename)
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f = open(filename, "w")
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f.close()
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epx_dir=args.savedir+args.dataset_name+'_epx/'+str(args.shot)+'shot'+'/'
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if os.path.exists(epx_dir):
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print('epx_dir exist')
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else:
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os.makedirs(epx_dir)
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dataset = build_dataset(args.dataset_name, args.dataset_dir, args.shot)
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classnames=dataset.classnames
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templates=dataset.template
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# loader = build_data_loader(data_source=dataset.val, batch_size=64, is_train=False, tfm=preprocess,
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# shuffle=False)
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loader = build_data_loader(data_source=dataset.test, batch_size=64, is_train=False, tfm=preprocess,
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shuffle=False)
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train_tranform = transforms.Compose([
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transforms.RandomResizedCrop(size=224, scale=(0.5, 1), interpolation=transforms.InterpolationMode.BICUBIC),
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transforms.RandomHorizontalFlip(p=0.5),
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transforms.ToTensor(),
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transforms.Normalize(mean=(0.48145466, 0.4578275, 0.40821073), std=(0.26862954, 0.26130258, 0.27577711))
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])
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#
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# train_loader_cache = build_data_loader(data_source=dataset.train_x, batch_size=256, tfm=train_tranform,
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# is_train=True, shuffle=False)
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train_loader_shuffle = build_data_loader(data_source=dataset.train_x, batch_size=256, tfm=train_tranform, is_train=True,
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shuffle=True)
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criterion = nn.CrossEntropyLoss().cuda()
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# if not os.path.isdir(args.log):
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# os.makedirs(args.log)
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# log = open(os.path.join(args.log, 'log.txt'), 'a')
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# state = {k: v for k, v in args._get_kwargs()}
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# log.write(json.dumps(state) + '\n')
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# log.close()
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#
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# cudnn.benchmark = True # Benchmark模式会提升计算速度，但是由于计算中有随机性，每次网络前馈结果略有差异
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#
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# log = open(os.path.join(args.log, 'log.txt'), 'a')
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# log.write('\n-------------------------------------------\n')
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# log.write(time.asctime(time.localtime(time.time())))
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# log.write('\n-------------------------------------------')
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# log.close()
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# process the data and prepare the dataloaders.
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# train_loader_shuffle, loader = generate_dataloader(args, preprocess)
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#拆分CLIP图像编码器
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if args.name =="ViT-B/16":
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CLIP_Text,Text_Encoder=partial_model.get_text(model,text_layer_idx=0)
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assert type(model.visual) == VisionTransformer
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CLIP_Image,Image_Encoder=partial_model.get_image_vit(model.visual, image_layer_idx=0)
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elif args.name =="ViT-B/32":
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CLIP_Text, Text_Encoder = partial_model.get_text(model, text_layer_idx=0)
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assert type(model.visual) == VisionTransformer
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CLIP_Image, Image_Encoder = partial_model.get_image_vit(model.visual, image_layer_idx=0)
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elif args.name == "RN50":
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CLIP_Text,Text_Encoder =partial_model.get_text(model,text_layer_idx=0)
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assert type(model.visual) == ModifiedResNet
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CLIP_Image,Image_Encoder=partial_model.get_image_resnet(model.visual, image_layer_idx=1)
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elif args.name == "RN101":
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CLIP_Text, Text_Encoder = partial_model.get_text(model, text_layer_idx=0)
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assert type(model.visual) == ModifiedResNet
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CLIP_Image, Image_Encoder = partial_model.get_image_resnet(model.visual, image_layer_idx=0)
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elif args.name == "RN50x16":
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CLIP_Text, Text_Encoder = partial_model.get_text(model, text_layer_idx=0)
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assert type(model.visual) == ModifiedResNet
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CLIP_Image, Image_Encoder = partial_model.get_image_resnet(model.visual, image_layer_idx=0)
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# 1000类标签经过clip
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model=model.cuda()
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zero_weights = all_classifier(classnames, templates, model)
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CLIP_Text,Text_Encoder,CLIP_Image,Image_Encoder=CLIP_Text.cuda(),Text_Encoder.cuda(),CLIP_Image.cuda(),Image_Encoder.cuda()
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weights_path = None
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best_epoch=0
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best_init_acc=0
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criterion_classifier_target = DClassifierForTarget(nClass=len(classnames)).cuda()
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criterion_classifier_source = DClassifierForSource(nClass=len(classnames)).cuda()
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text_weights=zero_weights
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adapter_weights=torch.cat([text_weights,text_weights],dim=1).T
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adapter = Weight_Adapter(1024, 2 * len(classnames),adapter_weights).cuda()
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ADAM_BETAS = (0.9, 0.999)
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if args.shot>=18:
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optimizer = torch.optim.AdamW([{'params': adapter.parameters(), 'lr': 0.001},
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{'params': Image_Encoder.parameters(), 'lr':0.00001},
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{'params': Text_Encoder.parameters(), 'lr': 0.00001}],
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eps=1e-5)
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else:
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# optimizer = torch.optim.AdamW([{'params': adapter.parameters(), 'lr': 0.0001},
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# {'params': Image_Encoder.parameters(), 'lr':0.00001},
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# {'params': Text_Encoder.parameters(), 'lr': 0.00001}],
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# eps=1e-5)
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# optimizer = torch.optim.AdamW([{'params': adapter.parameters()},
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# {'params': Image_Encoder.parameters()},
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# {'params': Text_Encoder.parameters()}],
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# eps=1e-5,lr=0.0001,weight_decay=0.0001)
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##caltech101
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# optimizer = torch.optim.AdamW(
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# [
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# {'params': adapter.parameters(), 'lr': 0.0001, 'weight_decay': 0.00001, 'betas': ADAM_BETAS},
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# {'params': Image_Encoder.parameters(), 'lr': 0.00001, 'weight_decay': 0.00001, 'betas': ADAM_BETAS},
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# {'params': Text_Encoder.parameters(), 'lr': 0.00001, 'weight_decay': 0.00001, 'betas': ADAM_BETAS}]
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# , eps=1e-4
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# )
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optimizer = torch.optim.AdamW(
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[
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{'params': adapter.parameters(), 'lr': 0.0001, 'weight_decay': 0.00001, 'betas': ADAM_BETAS},
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{'params': Image_Encoder.parameters(), 'lr': 0.00001, 'weight_decay': 0.00001, 'betas': ADAM_BETAS},
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{'params': Text_Encoder.parameters(), 'lr': 0.00001, 'weight_decay': 0.00001, 'betas': ADAM_BETAS}]
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, eps=1e-4
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)
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scheduler = torch.optim.lr_scheduler.CosineAnnealingLR(optimizer, args.epochs * len(train_loader_shuffle))
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source_train_loader_batch = enumerate(train_loader_shuffle)
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dir=args.savedir+args.dataset_name+'_epx/'+str(args.shot)+'shot'+'/'
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torch.save(CLIP_Text, dir + '/CLIP_Text.pth')
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torch.save(CLIP_Image, dir + '/CLIP_Image.pth')
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while (current_epoch < args.epochs):
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source_train_loader_batch, current_epoch, new_epoch_flag = train(classnames, templates,
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train_loader_shuffle,
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source_train_loader_batch,
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model,
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adapter,
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criterion_classifier_source,
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criterion_classifier_target,
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optimizer,
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current_epoch,
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args, scheduler, criterion, CLIP_Text,Text_Encoder,CLIP_Image,Image_Encoder)
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# evaluate on the val data
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if new_epoch_flag:
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if (current_epoch + 1) % args.test_freq == 0 or current_epoch == 0:
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if current_epoch >=args.valepoch:
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prec1 = validate(classnames, templates,loader, model, adapter, current_epoch, args, zero_weights, criterion,
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CLIP_Text,Text_Encoder,CLIP_Image,Image_Encoder)
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# record the best prec1 and save checkpoint
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is_best = prec1 > best_prec1
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if prec1 > args.valacc:
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save_dir = dir+'/epoch_' + str(current_epoch) + '_' + str(
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prec1)
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if not os.path.isdir(save_dir):
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os.mkdir(save_dir)
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torch.save(adapter, save_dir + '/_adapter_extractor.pth')
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torch.save(Text_Encoder, save_dir + '/Text_Encoder.pth')
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torch.save(Image_Encoder, save_dir + '/Image_Encoder.pth')
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best_prec1 = max(prec1, best_prec1)
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if is_best:
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weights_path=save_dir
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best_init_acc=best_prec1
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best_epoch=current_epoch
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# log = open(os.path.join(args.log, 'log.txt'), 'a')
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# log.write('Best acc: %3f' % (best_prec1))
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# log.close()
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filename=args.filename_dir+args.dataset_name+'.txt'
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strr=str(args.shot)+'shot'+' '+'best_epoch'+' '+str(best_epoch)+' '+'best_init_acc'+' '+str(best_init_acc)
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with open(filename, 'a') as f:
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f.write(strr+ '\n')
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f.close()
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# log = open(os.path.join(args.log, 'log.txt'), 'a')
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# log.write('\n-------------------------------------------\n')
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# log.write(time.asctime(time.localtime(time.time())))
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# log.write('\n-------------------------------------------\n')
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# log.close()
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if __name__ == '__main__':
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main()
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