使用python在opencv中显示图像

Question

我正在使用python.i学习openCv，我想显示图像，但是代码不起作用..它没有显示任何内容，而不是我搜索的错误，但问题仍然相同。

OpenCV-Python不显示图像

  import cv2
img = cv2.imread("D:\\iki\\images.png", 0)
if img is None:
  print ("The file does not exist")
else:
  cv2.imshow("image", img)

但这并不能解决我的问题..请指出我在哪里做错了，将不胜感激

错误： Traceback (most recent call last): File "C:/Users/ATech/AppData/Local/Programs/Python/Python37-32/cc task/FYP_OpenCv/read_show_img.py", line 7, in <module> cv2.imshow("image", img) cv2.error: OpenCV(4.0.0) C:\\projects\\opencv-python\\opencv\\modules\\highgui\\src\\window.cpp:625: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function 'cvShowImage' Traceback (most recent call last): File "C:/Users/ATech/AppData/Local/Programs/Python/Python37-32/cc task/FYP_OpenCv/read_show_img.py", line 7, in <module> cv2.imshow("image", img) cv2.error: OpenCV(4.0.0) C:\\projects\\opencv-python\\opencv\\modules\\highgui\\src\\window.cpp:625: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function 'cvShowImage'

Answer 1

只要确保您的文件确实存在。 尝试这个：

import cv2
img = cv2.imread("./Downloads/2nd-color.png", 0)
if img is None:
  print ("The file does not exist")
else:
  cv2.imshow("image", img)

注意imread中的第二个论点。 0是灰度。 看看： https : //docs.opencv.org/3.0-beta/doc/py_tutorials/py_gui/py_image_display/py_image_display.html#read-an-image

希望能帮助到你