tynguyen.tech's profile - activity

Thanks, but above code apparently did not work due to some issues such as: img -&gt

Thank you, Mathieu. I did like you and it worked though i had to changed the whole code into C++ API.

No word can say my appreciation to you, pros. Could you please give me some advice about learning OPENCV with this new C++ API ( such as book, or tutorial for the beginner? - the tutorial on docs.Opencv seems to be too hard to catch up with). Recently, i have been learning "OPENCV- computer vision with the OPENCv libarary" by Gary Bradski & Adrian Kaebler which relies on C-API.

Thank you. However, i have not gotten the picture. What do you mean by "NEWER C++ STYLE API" ? It is for example new version of Visual Studio or other environment such as Eclipse, right?

Thanks. I've tried as your instruction but i has not worked yet. When i tried to debug, it is CANNY edge detection function that program gets stuck. I've edited my question in which a screenshot that illustrates the issue when debugging is inserted. Pls help me crack it. Many thanks.

Dear pros, i'm the beginner in studying OPENCV. I got stuck in this beginning program, it could not debugged by OPENCV2.4.5.

Pls help me to figure it out. Many thanks.

#include <highgui.h>
#include <stdio.h>
#include <cv.h>
#include <assert.h>

IplImage* doPyrDown(
IplImage* in,
int filter 
)
{
assert(in->width%2 == 0 && in->height%2 == 0);
IplImage * out = cvCreateImage(
    cvGetSize(in),
    IPL_DEPTH_8U,
    3
);
cvPyrDown( in, out);
return(out);
}


 void main() {

    int  filter =  IPL_GAUSSIAN_5x5;
    IplImage* in = cvLoadImage("F:\\chandung.png");
    cvNamedWindow( "Example-in");
    cvNamedWindow( "Example-out");  
IplImage* out  = doPyrDown(in, filter);
cvShowImage( "Example-in", in);
cvShowImage( "Example-out", out);
cvReleaseImage( &out);
cvWaitKey( 0);
cvDestroyWindow( "Example-in");
cvDestroyWindow( "Example-out");

}

When i run it, this error exists:

When i debugged it, errors exists while executing CANNY edge detection function. Following is the screenshot that illustrates the issue: