visual c++ - OpenCV 2.0 C++ API using imshow: returns unhandled exception and "bad-flag"

Question

I'm trying to use the new OpenCV 2.0 API in MS Visual C++ 2008 and wrote this simple program:

cv::Mat img1 = cv::imread("image.jpg",1);
cv::namedWindow("My Window", CV_WINDOW_AUTOSIZE);
cv::imshow("My Window", img1);

Visual Studio returnes an unhandled exception and the Console returns:

OpenCV Error: bad flag (parameter or structure field) 
(Unrecognized or unsupported array type) in unknown function, 
file ........ocvopencvsrccxcorecxarray.cpp, line 2376

The image is not displayed. Furthermore the window "My Window" has a strange caption: "ììììMy Window", which is not dependent on the name.

The "old" C API using commands like cvLoadImage, cvNamedWindow or cvShowImage works without any problem for the same image file. I tried a lot of different stuff without success.

I appreciate any help here.

Konrad

Answer 1

As I just commented, imread isn't working for me either. A little googling shows other people having the same problem; I guess it's a bug in the library code. For now, here's a hacky workaround:

IplImage* img = cvLoadImage("lena.jpg");
cv::Mat lena(img);
cvReleaseImage(&img);

This way, you can at least use the C++ API for the rest of your stuff.