error: (-215:Assertion failed) size.width＞0 && size.height＞0 in function ‘cv::imshow‘(已解决)

错误的原因是cv.imshow这个函数

搜这个问题的时候发现很多博客在胡扯，这个函数的第一个参数根本不是什么地址

cv2.imshow('显示窗口名称',图像数组)

def imshow(winname, mat): # real signature unknown; restored from __doc__
"""
    .   -   If the image is 8-bit unsigned, it is displayed as is.
    .   -   If the image is 16-bit unsigned, the pixels are divided by 256. That is, the
    .       value range [0,255\*256] is mapped to [0,255].
    .   -   If the image is 32-bit or 64-bit floating-point, the pixel values are multiplied by 255. That is, the
    .       value range [0,1] is mapped to [0,255].
    .   -   32-bit integer images are not processed anymore due to ambiguouty of required transform.
"""

解决方案：

其中图像数组是numpy类型，如果是RGB三通道类型的，数组大小为：图像长*图像宽*3

 若出现报错，先检查是不是图像数组有问题，改成规定格式就能成功解决

注：

cv.show()函数测试

import cv2
img=cv2.imread('2007_000876.jpg')
cv2.imshow("img", img)
cv2.waitKey(0)
cv2.destroyAllWindows()

参考资料：

下面这个错误原因是，变量名不能重复使用

python - error: (-215:Assertion failed) bmi && width >= 0 && height >= 0 && (bpp == 8 || bpp == 24 || bpp == 32) in function 'FillBitmapInfo - Stack Overflow