load image with openCV Mat c++

by

I’ve talked about this so many times before, I guess it’s pointless to do it again, but code defensively: if a method/function call can fail, make sure you know when it happens:

Mat I = imread("C:\\images\\apple.jpg", 0);
if (I.empty())
{
    std::cout << "!!! Failed imread(): image not found" << std::endl;
    // don't let the execution continue, else imshow() will crash.
}

namedWindow( "Display window", CV_WINDOW_AUTOSIZE );// Create a window for display.
imshow( "Display window", I ); 
waitKey(0);

Note that Windows’ path uses backslash \ instead of the standard / used on *nix systems. You need to escape the backslash when passing the filename: C:\\images\\apple.jpg

Calling waitKey() is mandatory if you use imshow().

EDIT:

If it’s cv::imread() that is throwing the exception the only solution I know to work is downloading OpenCV sources and building it on the machine, since re-installing OpenCV doesn’t fix the issue.

More Related Contents:

  1. Efficiently load a large Mat into memory in OpenCV
  2. cv::Mat to QImage and back
  3. C++ OpenCV image sending through socket
  4. How to write a Float Mat to a file in OpenCV
  5. Exception non gérée à 0x100e3cf2 dans shervinemami.exe : 0xC0000094: Integer division by zero
  6. How to convert an OpenCV cv::Mat to QImage
  7. Rotate an image without cropping in OpenCV in C++
  8. OpenCV get pixel channel value from Mat image
  9. Accessing certain pixel RGB value in openCV
  10. Simple object detection using OpenCV and machine learning
  11. Camera position in world coordinate from cv::solvePnP
  12. How can I get the position and draw rectangle using opencv?
  13. Converting data from glReadPixels() to OpenCV::Mat
  14. Thread safe implementation of circular buffer
  15. OpenCV: process every frame
  16. Recommended values for OpenCV detectMultiScale() parameters
  17. Using hierarchy in findContours () in OpenCV?
  18. Cannot get OpenCV to compile because of undefined references?
  19. Audio output with video processing with opencv
  20. Rotate cv::Mat using cv::warpAffine offsets destination image
  21. OpenCV: How to visualize a depth image
  22. Why are the return values of these doubles -1.#IND?
  23. process video stream from memory buffer
  24. Unable to read frames from VideoCapture from secondary webcam with OpenCV
  25. Why “cout” works weird for “unsigned char”?
  26. How to write video file in OpenCV 2.4.3
  27. OpenCV’s Canny Edge Detection in C++
  28. Video processing with OpenCV in IOS Swift project
  29. OpenCV cv::Mat to std::ifstream for base64 encoding
  30. how to use gpu::Stream in OpenCV?

Leave a Comment