error: ‘CV_WINDOW_AUTOSIZE’ was not declared in this scope
This error occurs because the symbol CV_WINDOW_AUTOSIZE
is not declared in the scope of the program. To fix this issue:
Include Necessary Libraries: Ensure that the required OpenCV libraries are included at the beginning of your code.
cpp #include <opencv2/highgui/highgui.hpp>
Namespace Declaration: Use the
cv
namespace or specify the namespace for OpenCV functions and symbols.cpp using namespace cv;
Check OpenCV Version: Verify the version of OpenCV being used in the program. For newer versions,
CV_WINDOW_AUTOSIZE
might have been deprecated or replaced with other constants.Verify Function Usage: Confirm the correct usage of
CV_WINDOW_AUTOSIZE
in the context of the code. Ensure it's being used in the right place and manner within the OpenCV functions.Compiler or Configuration Errors: Check if there are any issues related to the compiler or configuration settings that might be affecting the inclusion of OpenCV libraries or symbols.
Library Linking: Ensure that the OpenCV library is correctly linked with your project or code, as improper linking can cause symbols like
CV_WINDOW_AUTOSIZE
to be unresolved.
Make sure to address these points in your code to resolve the 'not declared in this scope' error related to CV_WINDOW_AUTOSIZE
.