cv2.error: OpenCV(4.6.0) (-215:Assertion failed) !_src.empty() in function ‘cv::cvtColor‘

OpenCV(4.6.0) imread 读取空 问题解决方法小记

详情如下：

D:\ProgramData\Anaconda3\python.exe F:/.../image_q...ity.py
浙A..._207
C:\Users\kngin\...\浙A0..._207.jpeg======================
[ WARN:0@0.363] global D:\a\opencv-python\opencv-python\opencv\modules\imgcodecs\src\loadsave.cpp (239) cv::findDecoder imread_('C:\Users\kngin\...\浙A0..._207.jpeg'): can't open/read file: check file path/integrity
Traceback (most recent call last):
  File "F:/.../image_q...ity.py", line 15, in <module>
    resultScharr[imageName]=get_picture_scharr(os.path.join(img_folder, txt_file[index]))
  File "F:\...\Cle...gorithm.py", line 14, in get_picture_scharr
    image_gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
cv2.error: OpenCV(4.6.0) D:\a\opencv-python\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'

Process finished with exit code 1
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解决方案

1. 安装imageio模块

# 安装imageio模块，执行其一即可
pip install imageio -i https://pypi.tuna.tsinghua.edu.cn/simple some-package

conda install imageio
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2. 代码修改

# 原代码
import cv2
img = cv2.imread(path)


# 替换后代码，代码可正常运行
import imageio
img = imageio.imread(path)
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材料参考

• cv2.imread获取图片为空
• 2022-11-03关于cv2.imread()读取图片返回None的原因及解决办法