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 cv2from os import walk,pathdef 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, prefixif __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 <stdio.h>#include <highgui.h>#include <opencv2/opencv.hpp>#include <cv.h>using namespace std;using namespace cv;//读取指定文件下的所有图片vector<Mat> read_images_in_folder(cv::String pattern){ vector<cv::String> fn; glob(pattern, fn, false); vector<Mat> images; // vector<cv::String>&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<Mat> 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。