| CUB200-2011数据集介绍: | |
| 该数据集由加州理工学院再2010年提出的细粒度数据集,也是目前细粒度分类识别研究的基准图像数据集。 | |
| 该数据集共有11788张鸟类图像,包含200类鸟类子类,其中训练数据集有5994张图像,测试集有5794张图像,每张图像均提供了图像类标记信息,图像中鸟的bounding box,鸟的关键part信息,以及鸟类的属性信息,数据集如下图所示。 | |
| 下载的数据集中,包含了如下文件: | |
| bounding_boxes.txt;classes.txt;image_class_labels.txt; images.txt; train_test_split.txt. | |
| 其中,bounding_boxes.txt为图像中鸟类的边界框信息;classes.txt为鸟类的类别信息,共有200类; image_class_labels.txt为图像标签和所属类别标签信息;images.txt为图像的标签和图像路径信息;train_test_split.txt为训练集和测试集划分。 | |
| 本博客主要是根据train_test_split.txt文件和images.txt文件将原始下载的CUB200-2011数据集划分为训练集和测试集。在深度学习Pytorch框架下采用ImageFolder和DataLoader读取数据集较为方便。相关的python代码如下: | |
| (1) CUB200-2011训练集和测试集划分代码 | |
| # *_*coding: utf-8 *_* | |
| # author --liming-- | |
| """ | |
| 读取images.txt文件,获得每个图像的标签 | |
| 读取train_test_split.txt文件,获取每个图像的train, test标签.其中1为训练,0为测试. | |
| """ | |
| import os | |
| import shutil | |
| import numpy as np | |
| import config | |
| import time | |
| time_start = time.time() | |
| # 文件路径 | |
| path_images = config.path + 'images.txt' | |
| path_split = config.path + 'train_test_split.txt' | |
| trian_save_path = config.path + 'dataset/train/' | |
| test_save_path = config.path + 'dataset/test/' | |
| # 读取images.txt文件 | |
| images = [] | |
| with open(path_images,'r') as f: | |
| for line in f: | |
| images.append(list(line.strip('\n').split(','))) | |
| # 读取train_test_split.txt文件 | |
| split = [] | |
| with open(path_split, 'r') as f_: | |
| for line in f_: | |
| split.append(list(line.strip('\n').split(','))) | |
| # 划分 | |
| num = len(images) # 图像的总个数 | |
| for k in range(num): | |
| file_name = images[k][0].split(' ')[1].split('/')[0] | |
| aaa = int(split[k][0][-1]) | |
| if int(split[k][0][-1]) == 1: # 划分到训练集 | |
| #判断文件夹是否存在 | |
| if os.path.isdir(trian_save_path + file_name): | |
| shutil.copy(config.path + 'images/' + images[k][0].split(' ')[1], trian_save_path+file_name+'/'+images[k][0].split(' ')[1].split('/')[1]) | |
| else: | |
| os.makedirs(trian_save_path + file_name) | |
| shutil.copy(config.path + 'images/' + images[k][0].split(' ')[1], trian_save_path + file_name + '/' + images[k][0].split(' ')[1].split('/')[1]) | |
| print('%s处理完毕!' % images[k][0].split(' ')[1].split('/')[1]) | |
| else: | |
| #判断文件夹是否存在 | |
| if os.path.isdir(test_save_path + file_name): | |
| aaaa = config.path + 'images/' + images[k][0].split(' ')[1] | |
| bbbb = test_save_path+file_name+'/'+images[k][0].split(' ')[1] | |
| shutil.copy(config.path + 'images/' + images[k][0].split(' ')[1], test_save_path+file_name+'/'+images[k][0].split(' ')[1].split('/')[1]) | |
| else: | |
| os.makedirs(test_save_path + file_name) | |
| shutil.copy(config.path + 'images/' + images[k][0].split(' ')[1], test_save_path + file_name + '/' + images[k][0].split(' ')[1].split('/')[1]) | |
| print('%s处理完毕!' % images[k][0].split(' ')[1].split('/')[1]) | |
| time_end = time.time() | |
| print('CUB200训练集和测试集划分完毕, 耗时%s!!' % (time_end - time_start)) | |
| config文件 | |
| # *_*coding: utf-8 *_* | |
| # author --liming-- | |
| path = '/media/lm/C3F680DFF08EB695/细粒度数据集/birds/CUB200/CUB_200_2011/' | |
| ROOT_TRAIN = path + 'images/train/' | |
| ROOT_TEST = path + 'images/test/' | |
| BATCH_SIZE = 16 | |
| (2) 利用Pytorch方式读取数据 | |
| # *_*coding: utf-8 *_* | |
| # author --liming-- | |
| """ | |
| 用于已下载数据集的转换,便于pytorch的读取 | |
| """ | |
| import torch | |
| import torchvision | |
| import config | |
| from torchvision import datasets, transforms | |
| data_transform = transforms.Compose([ | |
| transforms.Resize(224), | |
| transforms.ToTensor(), | |
| transforms.Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225]) | |
| ]) | |
| def train_data_load(): | |
| # 训练集 | |
| root_train = config.ROOT_TRAIN | |
| train_dataset = torchvision.datasets.ImageFolder(root_train, | |
| transform=data_transform) | |
| CLASS = train_dataset.class_to_idx | |
| print('训练数据label与文件名的关系:', CLASS) | |
| train_loader = torch.utils.data.DataLoader(train_dataset, | |
| batch_size=config.BATCH_SIZE, | |
| shuffle=True) | |
| return CLASS, train_loader | |
| def test_data_load(): | |
| # 测试集 | |
| root_test = config.ROOT_TEST | |
| test_dataset = torchvision.datasets.ImageFolder(root_test, | |
| transform=data_transform) | |
| CLASS = test_dataset.class_to_idx | |
| print('测试数据label与文件名的关系:',CLASS) | |
| test_loader = torch.utils.data.DataLoader(test_dataset, | |
| batch_size=config.BATCH_SIZE, | |
| shuffle=True) | |
| return CLASS, test_loader | |
| if __name__ == '__main___': | |
| train_data_load() | |
| test_data_load() |