如何使用Python和OpenCV从目录中读取图像? [英] How to read images from a directory with Python and OpenCV?

问题描述

我编写了以下代码:

import os
import cv2
import random
from pathlib import Path

path = Path(__file__).parent
path = "../img_folder"
for f in path.iterdir():

    f = str(f)

    img=cv2.imread(f)

    im_height = img.shape[0]
    im_width = img.shape[1]

但是当我运行此代码时，出现以下错误:

But when I run this code, I get the following error:

AttributeError:"noneType"对象在im_height = img.shape [0]中没有属性"shape".

AttributeError: 'NoneType' object has no attribute 'shape' in im_height = img.shape[0].

我认为我无法访问图像，所以我写了print(img)和print(type(omg))以及None&返回. img_folder是一个包含10张图像的文件夹.当我打印出f时，我得到:

I think I cannot access images, so I wrote print(img) and print(type(omg)) and None& is returned. img_folder is a folder that has 10 images. When I print out f, I get:

../img_folder/.DS_Store

../img_folder/.DS_Store

我不知道为什么包含.DS_Store，因为img_folder仅包含图像.我该如何解决?我该怎么写?为什么我不能访问图像?

I do not know why .DS_Store is contained because img_folder has only images. How should I fix this? What should I write this? Why can't I access images?

推荐答案

您至少发布了三个有关使用"PostPath"获取文件名的问题.不好.

You have post at least three questions about get filenames with "PostPath". Badly.

更好的方法是使用glob.glob获取文件名的特定类型.

A better way is use glob.glob to get the specific type of filenames.

$ tree .
├── a.txt
├── feature.py
├── img01.jpg
├── img01.png
├── imgs
│   ├── img02.jpg
│   └── img02.png
├── tt01.py
├── tt02.py
└── utils.py

1 directory, 9 files

从当前目录:

import glob
import itertools

def getFilenames(exts):
    fnames = [glob.glob(ext) for ext in exts]
    fnames = list(itertools.chain.from_iterable(fnames))
    return fnames


## get `.py` and `.txt` in current folder
exts = ["*.py","*.txt"]
res = getFilenames(exts)
print(res)
# ['utils.py', 'tt02.py', 'feature.py', 'tt01.py', 'a.txt']


# get `.png` in  current folder and subfolders
exts = ["*.png","*/*.png"]
res = getFilenames(exts)
print(res)
# ['img01.png', 'imgs/img02.png']

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