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。
