按比例从文件夹中取一定数量图片

# -*- coding: utf-8 -*-

import os, random, shutil

def moveFile(fileDir):
    pathDir = os.listdir(fileDir)  # 取图片的原始路径
    filenumber = len(pathDir)
    rate = 0.75  # 自定义抽取图片的比例
    picknumber = int(filenumber * rate)  # 按照rate比例从文件夹中取一定数量图片
    sample = random.sample(pathDir, picknumber)  # 随机选取picknumber数量的样本图片
    print (sample)
    for name in sample:
        shutil.move(fileDir + name, tarDir + name)
    return

if __name__ == '__main__':
    fileDir = "/mnt/NIvsCG/datasets/prcg_images/"  # 源图片文件夹路径
    tarDir = '/mnt/NIvsCG/datasets/train/'  # 移动到新的文件夹路径
    moveFile(fileDir)

随机选取一定数量的样本图片

import os, random, shutil

data_base_dir = "/mnt/NIvsCG/temp/train/"  # 源图片文件夹路径

tarDir = "/mnt/NIvsCG/random/train/"  # 移动到新的文件夹路径

for file in os.listdir(data_base_dir):
    fileDir = data_base_dir + file + '/'  # 取图片的原始路径
    pathDir = os.listdir(fileDir)
    filenumber = len(pathDir)

    if filenumber > 30:
        picknumber = 30  # 所取图片数量
        sample = random.sample(pathDir, picknumber)  # 随机选取picknumber数量的样本图片
        print(sample)
        for name in sample:
        shutil.copy(fileDir + name, tarDir + name)

按比例从文件夹中取一定数量图片，并在移动到新文件夹之前重命名选取的图片

import os, random, shutil

def moveFile(fileDir):

pathDir = os.listdir(fileDir)  # 取图片的原始路径
filenumber = len(pathDir)
rate = 0.75  # 自定义抽取图片的比例
picknumber = int(1000 * rate)  # 按照rate比例从文件夹中取一定数量图片
sample = random.sample(pathDir, picknumber)  # 随机选取picknumber数量的样本图片
count = 1

for namein sample:
    shutil.move(fileDir + name, tarDir + name)
    os.rename(os.path.join(tarDir, name), os.path.join(tarDir, str(count) + ".jpg"))
    count += 1
return

if __name__ == '__main__':
    fileDir = "/mnt/NIvsCG/datasets/mobilephone_img/"  # 源图片文件夹路径
    tarDir = "/mnt/NIvsCG/datasets/train/"  # 移动到新的文件夹路径
    moveFile(fileDir)