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

 代码如下： import cv2 as cv import numpy as np #读取图片 img=cv.imread(r'E:\Downloaded\pexels\The sea21471.jpeg',1) #获取图片的长宽信息 sp=img.shape length=sp[1] heighth=sp[0] print('加载的图片的宽度:{},高度:{}'.format(length,

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