Egnatius's profile - activity

Hi, just trying the openCV kalman.cpp

my computer crashes at this line because of reading forbidden memory:

KF.transitionMatrix = *(Mat_<float>(2, 2) << 1, 1, 0, 1);

And I don't understand why this cause a violating read.

the program works (in a sense) after I changed it to use "at" function to modify each element separately. It works "in a sense" because it now crashes after I hit ESC,q or Q. And the only line of code after that is return 0. I'm not a CS student but what makes a program crash when returning?

And if use memcpy to do it, it will crash after several (about 10) times I restart the Kalman process by pressing any key other than ESC, q, Q.

My computer seems to have problems with all kinds of sample codes even if I follow the instruction carefully, does anybody know any probable cause?

It seems to work perfect after switching from 2.4.2 to 2.4.0.

My code with cv2DRotationMatrix() compiles but always terminates with status -1073741515

I've tried many codes on the internet and in books but still the same.

I can't figure out where went wrong.

My code:

int main() {

IplImage *image, *image2;
CvMat *transmat;
CvPoint2D32f center;
double angle = 45.0;
double scale = 0.6;
image = cvLoadImage("lena.jpg",CV_LOAD_IMAGE_UNCHANGED);
if(!image){
    printf("Image open failed. Shutting down\n");
    system("PAUSE");
    return -1;
}
transmat = cvCreateMat(2,3,CV_32FC1);
image2 = cvCloneImage(image);
center.x = image->width/2;
center.y = image->height/2;

cv2DRotationMatrix(center,angle,scale,transmat);
cvWarpAffine(image, image2, transmat,image->nSize);
cvShowImage("Original",image);
cvShowImage("Rotated",image2);
cvWaitKey(0);
cvDestroyWindow("Original");
cvDestroyWindow("Rotated");
cvReleaseImage(&image);
cvReleaseImage(&image2);
cvReleaseMat(&transmat);
system("PAUSE");
return 0;

}

I'm using Code::Blocks under Win7.