本文实例为大家分享了python或C++读取指定文件夹下的所有图片，供大家参考，具体内容如下

1.python读取指定文件夹下的所有图片路径和图片文件名

import cv2

from os import walk,path

def get_fileNames(rootdir):

data=[]

prefix = []

for root, dirs, files in walk(rootdir, topdown=True):

for name in files:

pre, ending = path.splitext(name)

if ending != ".jpg" and ending != ".jepg" and ending != ".png":

continue

else:

data.append(path.join(root, name))

prefix.append(pre)

return data, prefix

if __name__ == '__main__':

images, preifx = get_fileNames('/home/yasin/target_pics') #得到指定文件夹下的图片，例如.jpg，.jepg或.png等，可根据上述代码更改

for i in range(len(images)):

img = cv2.imread(images[i])

w = img.shape[1]

l = img.shape[0]

img_res = cv2.resize(img, (w*2,l*2)) #对图片操作后

cv2.imwrite("./resized_wb/{}.jpg".format(preifx[i]),img_res)

2.C++得到指定文件夹下的所有图片并返回读取Mat值

#include

#include

#include

#include

using namespace std;

using namespace cv;

//读取指定文件下的所有图片

vector

read_images_in_folder(cv::String pattern)

{

vector

fn;

glob(pattern, fn, false);

vector

images;

// vector

&prefix //

size_t count = fn.size(); //number of png files in images folder

for (size_t i = 0; i < count; i++)

{

// prefix.push_back(fn[i].substr(20, 4)); // 此处可以得到文件名的子字符串，可以获取图片前缀

images.push_back(imread(fn[i])); //直读取图片并返回Mat类型

//imshow("img", imread(fn[i]));

//waitKey(1000);

}

return images;

}

int main()

{

cv::String pattern = "./*.jpg";

//遍历得到目标文件中所有的.jpg文件

vector

images = read_images_in_folder(pattern);

for (int i = 0; i < images.size(); i++)

{

imshow("img", images[i]);

waitKey(1000);

}

// system("pause");

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。