解决 OpenCV cv2.imread()、cv2.imwrite()函数无法读取、写入以中文命名的图像文件及含有中文路径的图像文件

古城微笑少年丶 2021-12-04 09:47 716阅读 0赞

**环境**：Windows10、Python3.6、OpenCV3.3  
**问题**  
OpenCV 函数cv2.imread()、cv2.imwrite()在读取含有中文路径及以中文命名的文件时，会报错，主要原因是因为cv2.imread()、cv2.imwrite()不支持中文。

代码及出错代码

import cv2
    img = cv2.imread(r"G:\Python_work\图片\vikings.jpg")
    cv2.imshow("img",img)
    cv2.waitKey()
    cv2.destroyAllWindows()

**报错**  
OpenCV(3.4.1) Error: Assertion failed (size.width>0 && size.height>0) in cv::imshow, file D:\\Build\\OpenCV\\opencv-3.4.1\\modules\\highgui\\src\\window.cpp, line 364  
Traceback (most recent call last):  
File “G:/Python\_work/test/test2.py”, line 5, in  
cv2.imshow(“img”,img)  
cv2.error: OpenCV(3.4.1) D:\\Build\\OpenCV\\opencv-3.4.1\\modules\\highgui\\src\\window.cpp:364: error: (-215) size.width>0 && size.height>0 in function cv::imshow

**解决方法：**

OpenCV cv2.imdecode()、cv2.imencode()方法可以解决。

import cv2
        import numpy as np
        img_path = r"G:\Python_work\图片\vikings.jpg"
        #img = cv2.imread(r"G:\Python_work\图片\vikings.jpg")
        img = cv2.imdecode(np.fromfile(img_path,dtype=np.uint8),cv2.IMREAD_UNCHANGED)
        #也可以写成cv2.imdecode(np.fromfile(img_path,dtype=np.uint8),-1)；
        # cv2.IMREAD_UNCHANGED参数可以用-1代替
        #cv2.IMREAD_GRAYSCALE:以灰度模式读入图像：其值为0
        #cv2.IMREAD_COLOR:读入彩色图像：其值为1；
        #np.fromfile()函数相对应的函数为np.tofile()
        img_write = cv2.imencode(".jpg",img)[1].tofile(img_path)
        #cv2.imencode()函数返回两个值;写入成功返回Ture，另一个值为数组.
        #_,im_encode = cv2.imencode(".jpg",img)
        cv2.imshow("img",img)
        cv2.waitKey()
        cv2.destroyAllWindows()

其中 **cv2.imwrite()** 的解决方法为：

cv2.imwrite(imagepath, frame)

修改为

cv2.imencode('.jpg', frame)[1].tofile(imagepath)

**参考链接：**

[https://blog.csdn.net/kebu12345678/article/details/54837245（NumPy][https_blog.csdn.net_kebu12345678_article_details_54837245_NumPy] 文件存取 tofile，fromfile， load，save）;

[https://blog.csdn.net/dcrmg/article/details/79155233][https_blog.csdn.net_dcrmg_article_details_79155233](OpenCV-Python cv2.imdecode()和cv2.imencode() 图片解码和编码)

[https_blog.csdn.net_kebu12345678_article_details_54837245_NumPy]: https://blog.csdn.net/kebu12345678/article/details/54837245%EF%BC%88NumPy
[https_blog.csdn.net_dcrmg_article_details_79155233]: https://blog.csdn.net/dcrmg/article/details/79155233