## Vision Transformer(ViT)
# 代码会自动载入预训练权重
1. 准备好自定义数据集,按照下面格式摆放
data-train---后面跟文件夹,每个文件夹里面存放相同的图像,几个文件夹代表几个分类
data-test
2. 在 `train.py` 脚本中更改下面超参数
# num_classes 必须根据分类的个数进行更改 !!!其他的看着改
parser.add_argument('--num-classes', type=int, default=5)
parser.add_argument('--epochs', type=int, default=100)
parser.add_argument('--batch-size', type=int, default=16)
parser.add_argument('--lr', type=float, default=0.001)
parser.add_argument('--lrf', type=float, default=0.01)
parser.add_argument('--freeze-layers', type=bool, default=True) # 是否冻结权重
3.`predict.py`脚本会自动预测 inference 文件夹下的所以图片
# 下面的三个都要更改,num_classes 是自己分类的个数
# mean,std 是训练图片的均值和方差,训练的时候会生成,copy在这里就行('./run_results/train_log_results.txt' 文件里也有)
num_classes = 5
mean = [0.467,0.424,0.304]
std = [0.301,0.271,0.296]
main(mean=mean,std=std,num_classes=num_classes)
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Vision Transformer 网络对不同氨气氧气浓度轨迹RAS 图像数据集的分类,包含训练权重和数据集、迁移学习
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温馨提示
1.网络使用的是Transformer 网络中的 ViT 模型 2.数据集是4分类的氨气氧气浓度曲线数据集(5mg/L等等) 3.网络训练的过程中,会对数据集的训练集图像求取灰度值的均值和方差,预处理处理包括随机裁剪、中心裁剪等等。网络初始化会自动载入ViT 官方的预训练权重(transformer网络收敛很慢,不经过预训练效果会很差,因此本篇代码自动载入) 4.train.py 会自动生成数据集类别的 json 文件,所以不需要自己定义。train.py 训练完成会生成训练集的loss、测试集的loss,训练集的accuracy、测试集的accuracy,并生成对应的曲线保存至run_results文件内。训练完成会计算训练集和测试集的混淆矩阵,计算召回率、特异度啥的 5.预测代码是predict.py,只需要将待预测的图像放在inference文件夹下,代码会自动将该文件下所有的图像进行预测,并在原图像左上角写入最大的前三个类别和概率 【如果想要训练自己的数据集,参考README文件】 【本项目测试了10个epoch,准确率为0.71,网络未收敛,加大轮次可以增加精度】
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