Python 找不到存在的目录

Question

我的文件夹结构如下所示

.  
├── requirements.txt  
├── resources  
│   ├── img  
│   │   └── chessboard  
│   │       ├── 2022-02-01-153053.jpg  
│   │       ├── 2022-02-01-153058.jpg  
│   │       ├── 2022-02-01-153101.jpg  
│   │       ├── 2022-02-01-153103.jpg  
│   │       ├── 2022-02-01-153106.jpg  
│   │       ├── 2022-02-01-153108.jpg  
│   │       ├── 2022-02-01-153112.jpg  
│   │       ├── 2022-02-01-153116.jpg    
│   │       ├── 2022-02-01-153118.jpg  
│   │       ├── 2022-02-01-153123.jpg  
│   │       ├── 2022-02-01-153126.jpg  
│   │       ├── 2022-02-01-153129.jpg  
│   │       ├── 2022-02-01-153131.jpg  
│   │       ├── 2022-02-01-153134.jpg  
│   │       ├── 2022-02-01-153136.jpg  
│   │       └── 2022-02-01-153137.jpg  
└──scripts  
    └── calibrate.py

和calibrate.py看起来像这样

import os
import cv2
import numpy as np
from glob import glob

# Parameters
IMAGES_DIR = os.path.join("..", "resources", "img", "chessboard")
IMAGES_FORMAT = ".jpg"
SQUARE_SIZE = 2.9  # cm
# Count lines not boxes
WIDTH = 6
HEIGHT = 7


def calibrate_chessboard(dir_path, image_format, square_size, width, height):
    """Calibrate a camera using chessboard images."""
    images = glob(f"{dir_path}/*.{image_format}")

    criteria = (cv2.TERM_CRITERIA_EPS + cv2.TERM_CRITERIA_MAX_ITER, 30, 0.001)

    objp = np.zeros((height * width, 3), np.float32)
    objp[:, :2] = np.mgrid[0:width, 0:height].T.reshape(-1, 2)
    objp = objp * square_size

    objpoints = []  # 3d point in real world space
    imgpoints = []  # 2d points in image plane.

    # Iterate through all images
    for file in images:
        img = cv2.imread(str(file))
        gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

        # Find the chess board corners
        ret, corners = cv2.findChessboardCorners(gray, (width, height), None)

        # If found, add object points, image points (after refining them)
        if ret:
            objpoints.append(objp)

            corners2 = cv2.cornerSubPix(gray, corners, (11, 11), (-1, -1), criteria)
            imgpoints.append(corners2)

    # Calibrate camera
    ret, mtx, dist, rvecs, tvecs = cv2.calibrateCamera(
        objpoints, imgpoints, gray.shape[::-1], None, None
    )

    return [ret, mtx, dist, rvecs, tvecs]

# Calibrate
ret, mtx, dist, rvecs, tvecs = calibrate_chessboard(
    IMAGES_DIR, IMAGES_FORMAT, SQUARE_SIZE, WIDTH, HEIGHT
)

出于某种原因，尽管路径正确，但我无法理解 images = glob(f"{dir_path}/*.{image_format}") 行找不到任何文件，我什至尝试在根目录和 scripts/ 文件夹中执行。该脚本应该 glob 目录中的所有文件并使用它们来查找相机失真矩阵

Answer 1

我发现您的路径/文件类型存在一个潜在的小问题。

images = glob(f"{dir_path}/*.{image_format}")

和

IMAGES_FORMAT = ".jpg"

它们都包含 .，因此您找不到任何图片，因为它们只有一个点。尝试从 IMAGES_FORMAT = ".jpg" 或您的另一行中删除点。

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