cv2 :: imshow的参数 [英] Arguments to cv2::imshow

问题描述

原始标题将numpy数组转换为cvmat"是一个错误-OpenCV的信息不那么有用，而且我没有阅读文档！

使用 OpenCV 2，

With OpenCV 2, IPython now uses NumPy arrays by default.

cvimage = cv2.imread("image.png") #using OpenCV 2
type(cvimage)
Out: numpy.ndarray  #dtype is uint8

pltimage = plt.imread("image.png")  #using Matplotlib
type(pltimage)
Out: numpy.ndarray   #dtype is float

plt.imshow(cvimage)  # works great

cv2.imshow(cvimage)
TypeError: Required argument 'mat' (pos 2) not found

由于默认情况下cv2使用NumPy数组，因此不再有任何cv :: Mat构造函数，并且NumPy没有函数可以转换为cv::Mat数组.

Since cv2 uses NumPy arrays by default, there is no longer any cv::Mat constructor and NumPy has no functions to convert to a cv::Mat array.

有什么想法吗?

推荐答案

该函数具有以下文档字符串:imshow(winname, mat) -> None. 您可以通过在解释器中输入cv2.imshow.__doc__来查看文档字符串.

The function has the following docstring: imshow(winname, mat) -> None. You can see the doc string by typing cv2.imshow.__doc__ in the interpreter.

尝试cv2.imshow('Image', cvimage).

tl; dr:在原始问题中，缺少窗口名称"的第一个参数. "imshow"具有两个参数，仅提供了一个.

tl;dr : In original question, first argument of "window name" was missing. "imshow" takes two parameters and only one was supplied.

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