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

This error occurs when OpenCV encounters an image or matrix with a width of zero or a negative value. This can happen if the image or matrix was not properly initialized or if it was resized incorrectly.

To solve this error, make sure that the image or matrix has a valid width and height, and that it has been initialized properly. You can also check the code where the error occurred to ensure that the input values are correct and that any resizing operations are performed correctly.

相关问题

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

这个错误是由于在使用cv2.imshow函数时，传入的图像尺寸出现了问题。具体地说，图像的宽度和高度需要大于0才能正确显示。根据引用、和中的报错信息，你可以查看你的代码中是否正确读取了图片，并且确认图片的尺寸是否正确。如果图片的尺寸为0，那么你需要检查图片文件是否存在、路径是否正确，或者尝试使用其他图片进行测试。如果图片的尺寸不为0，那么你可能需要检查其他代码部分，如图像处理过程中是否存在异常，或者其他函数的调用是否正确。请仔细检查你的代码，并确保所有输入参数的正确性，以解决这个错误。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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cv2.error: OpenCV(4.7.0) D:\a\opencv-python\opencv-python\opencv\modules\highgui\src\window.cpp:971: error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'cv::imshow'

这个错误是由于使用cv2.imshow()函数时传递了一个无效的图像大小导致的。请确保您正在传递有效的图像大小作为参数，例如：

import cv2

# 读取图像
img = cv2.imread('image.jpg')

# 确认图像读取成功
if img is not None:
    # 显示图像
    cv2.imshow('image', img)
    cv2.waitKey(0)
    cv2.destroyAllWindows()
else:
    print('无法读取图像文件')

如果您仍然遇到问题，请检查您的图像是否存在，或者使用其他图像文件进行测试。