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

This error occurs when the width of an image or video frame is equal to or less than zero. This means that there is no image data to work with, and the program cannot perform the desired operation on the image.

To fix this error, you will need to ensure that the input image or video frame has a valid size. This could involve checking the source of the image or video to ensure that it is being read correctly, or checking the dimensions of the image before passing it to any processing functions.

It may also be helpful to print out the dimensions of the image or video frame as it is being processed, so that you can identify exactly where the error is occurring.

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。