适用场景:从训练集中随机抽取一定比例作为验证集
# -*- coding:utf-8 -*-
import os
import random
import shutil
# source_file:源路径, target_ir:目标路径
def cover_files(source_dir, target_ir):
for file in os.listdir(source_dir):
source_file = os.path.join(source_dir, file)
if os.path.isfile(source_file):
shutil.copy(source_file, target_ir)
def ensure_dir_exists(dir_name):
"""Makes sure the folder exists on disk.
Args:
dir_name: Path string to the folder we want to create.
"""
if not os.path.exists(dir_name):
os.makedirs(dir_name)
def moveFile(file_dir, save_dir):
ensure_dir_exists(save_dir)
path_dir = os.listdir(file_dir) # 取图片的原始路径
filenumber = len(path_dir)
rate = 0.1 # 自定义抽取图片的比例,比方说100张抽10张,那就是0.1
picknumber = int(filenumber*rate) # 按照rate比例从文件夹中取一定数量图片
sample = random.sample(path_dir, picknumber) # 随机选取picknumber数量的样本图片
print (sample)
for name in sample:
shutil.move(file_dir+name, save_dir+name)
if __name__ == '__main__':
file_dir = 'val/' # 源图片文件夹路径
save_dir = 'images_val/' # 移动到新的文件夹路径
moveFile(file_dir, save_dir)
转载:https://blog.csdn.net/weixin_40769885/article/details/82869760