cmake error ‘the source does not appear to contain CMakeLists.txt’
You should do mkdir build and cd build while inside opencv folder, not the opencv-contrib folder. The CMakeLists.txt is there.
opencv
Converting a Cubemap into Equirectangular Panorama
Assuming the input image is in the following cubemap format: The goal is to project the image to the equirectangular format like so: The conversion algorithm is rather straightforward. In order to calculate the best estimate of the color at each pixel in the equirectangular image given a cubemap with 6 faces: Firstly, calculate polar … Read more
SystemError: new style getargs format but argument is not a tuple?
What causes the SystemError in this line of code cv2.line(output, point1, point2, (0,0,255), 5)?
OpenCV Error: Assertion failed (size.width>0 && size.height>0) simple code
This error means that you are trying to show an empty image. When you load the image with imshow, this is usually caused by: The path of your image is wrong (in Windows escape twice directory delimiters, e.g. imread(“C:\path\to\image.png”) should be: imread(“C:\\path\\to\\image.png”), or imread(“C:/path/to/image.png”)); The image extension is wrong. (e.g. “.jpg” is different from “.jpeg”); You don’t have the rights … Read more
How to crop an image in OpenCV using Python
It’s very simple. Use numpy slicing.
Installing opencv on Windows 10 with python 3.6 and anaconda 3.6
search anaconda promptopen and run the command. this single command help’s you to install opencv easily.you can take help from the video link below. video link
OpenCV NoneType object has no attribute shape
It means that somewhere a function which should return a image just returned None and therefore has no shape attribute. Try “print img” to check if your image is None or an actual numpy object.
ImportError: No module named cv2
In here, I have installed numpy and opencv in my windows operating system. But i can’t find out the proper way to add cv2 modu
Cannot import cv2 in python in OSX
I do not know what pip install cv2 actually installs… but is surely not OpenCV. pip install cv2 actually installs this, which are some blog distribution utilities, not sure what it is, but it is not OpenCV. To properly install OpenCV, check any of the links @udit043 added in the comment, or refer to any … Read more
ImportError: No module named ‘cv2’ Python3
Try to get the cv2. I’m not sure when opencv-python became available. I’d been building opencv by hand, but when I looked a few weeks ago, there it was. I’m using cv2 with Python3 in a VM that’s running ubuntu/trusty64.