http://pastebin.com/5ZeMvm2C is my header file in my project.

There are skeleton.at<uchar>(yaxis,xaxis+1) at line 249. When i type this code in my project i got this error:

OpenCV Error: Assertion failed (dims <= 2 && data && (unsigned)i0 < (unsigned)si ze.p[0] && (unsigned)(i1DataType<_Tp>::channels) < (unsigned)(size.p[1]channel s()) && ((((sizeof(size_t)<<28)|0x8442211) >> ((DataType<_Tp>::depth) & ((1 << 3 ) - 1))*4) & 15) == elemSize1()) in unknown function, file c:\opencv\build\inclu de\opencv2\core\mat.hpp, line 537

What's wrong?

http://pastebin.com/gqJ5RpBU is also my .cpp file. My previous question is

http://stackoverflow.com/questions/20069300/how-can-i-remove-unwanted-part-of-an-image-with-opencv-using-c.

You can get what i would like to do.

I would like to remove unwanted part of my image. How could i do this. What kind of algorithm should i use?

http://pastebin.com/DL0iuS6N that is my WallFinder.h file and http://pastebin.com/3H9Hb19F is my WallFinder.cpp file.

My problem is that I would like to insert a new element to lines vector. However When I wrote lines.push_back(Vec4i((*it2)[0],yaxis,xaxis,yaxis)); after calling writeToFile function. I got error message that Assertion Failed! Expression:_CrtIsValidHeapPointer(pUsrData)

How can i insert to new element to my lines vector or What is my problem?

http://pastebin.com/3H9Hb19F This is also .cpp file of .h file

http://pastebin.com/DL0iuS6N

if(xaxis!=(it2)[0]) { line(skeleton,Point((it2)[0],yaxis),Point(xaxis,yaxis),color); writeToFile((it2)[0],yaxis,xaxis,yaxis,i); lines.push_back(Vec4i((it2)[0],yaxis,xaxis,yaxis)); // LINE OF CODE WHICH FAILS ++i; } //...

_CrtIsValidHeapPointer(pUsrData) expression in error message

I have tried your recommend again and again but problem is go on.

This is my vector.

vector (Vec4i) lines; I have tried this but It is not working.

lines.push_back((0,0,10,10));

How can i do this job correctly?

i want to detect only walls. http://3drendering-studio.co.uk/images/home-floor-plan-js.jpg in this image is my input image. Only walls should remain in my image. how can erosion or dilation can do that?

i want to detect only walls. http://3drendering-studio.co.uk/images/home-floor-plan-js.jpg in this image is my input image. Only walls should remain in my image. how can erosion or dilation can do that?

I would like to detect lines in an image and write them to a file. However HougLinesP function detects some unsignificant things as an line. For example ( case B in Bedroom or thinner lines in image ). I don't want HoughLineP to detect thinner lines and texts. I want to eliminate them. How can i achieve my goal?

I have a project about computer vision. My project is that converting 2D floor plan to 3D. To do this, I should detect rooms of the plan then I should detect objects in the room ( for example: dining table, sink, armchair ). What can i learn to do this job? Which topics related to it? How can i make preparation?

I want to Use the capture and store code below together with the doPyrDown() code to create a program that reads from a camera and stores downsampled color images to disk. Then I want to display the frames as they are processed.

#include <opencv/cv.h>
#include <opencv2/highgui/highgui.hpp>
IplImage* doPyrDown(
IplImage* in,
int filter = IPL_GAUSSIAN_5x5
) {
// Best to make sure input image is divisible by two.
//
//assert( in->width%2 == 0 && in->height%2 == 0 );
IplImage* out = cvCreateImage(
cvSize( in->width/2, in->height/2 ),
in->depth,
in->nChannels
);
cvPyrDown( in, out );
return( out );
}
int main( int argc, char** argv ) {
CvCapture* capture = 0;
capture = cvCreateFileCapture( argv[1] );
if(!capture){
return -1;
}
IplImage *bgr_frame=cvQueryFrame(capture);//Init the video read
double fps = cvGetCaptureProperty (
capture,
CV_CAP_PROP_FPS
);
CvSize size = cvSize(
(int)cvGetCaptureProperty( capture, CV_CAP_PROP_FRAME_WIDTH),
(int)cvGetCaptureProperty( capture, CV_CAP_PROP_FRAME_HEIGHT)
);
CvVideoWriter* writer = cvCreateVideoWriter(
argv[2],
CV_FOURCC('M','J','P','G'),
fps,
size
);
IplImage* logpolar_frame = cvCreateImage(
size,
IPL_DEPTH_8U,
3
);
while( (bgr_frame=cvQueryFrame(capture)) != NULL ) {
cvLogPolar( bgr_frame, logpolar_frame,
cvPoint2D32f(bgr_frame->width/2,
bgr_frame->height/2),
40,
CV_INTER_LINEAR+CV_WARP_FILL_OUTLIERS );
logpolar_frame=doPyrDown(logpolar_frame,IPL_GAUSSIAN_5x5);
cvWriteFrame( writer, logpolar_frame );
}
cvNamedWindow( "Example2", CV_WINDOW_AUTOSIZE );
capture = cvCreateFileCapture( argv[2] );
IplImage* frame;
while(1) {
frame = cvQueryFrame( capture );
if( !frame ) break;
cvShowImage( "Example2", frame );
char c = cvWaitKey(33);
if( c == 27 ) break;
}
cvReleaseVideoWriter( &writer );
cvReleaseImage( &logpolar_frame );
cvReleaseCapture( &capture );
cvDestroyWindow( "Example2" );
return(0);
}

I got this error in the command line OpenCV Error: Insufficient memory (Failed to allocate 1228820 bytes) in unknown function, file ......\src\opencv\modules\core\src\alloc.cpp, line 52

I have solved the problem. Thx so much

Can you explain step by step. I have tried this but It is not still working.

I would like to debug my program but I got opencv_core246d.dll could not found error message. How can i solve this? Note: I have installed OpenCV 2.4.6 again and again.

Hi,

My code is:

include <opencv2 core="" core.hpp="">

include <opencv2 highgui="" highgui.hpp="">

include <iostream>

using namespace cv; using namespace std;

int main( int argc, char** argv ) { if( argc != 2) { cout <<" Usage: display_image ImageToLoadAndDisplay" << endl; return -1; }

Mat image;
image = imread(argv[1], IMREAD_COLOR); // Read the file

if(! image.data )                      // Check for invalid input
{
    cout <<  "Could not open or find the image" << std::endl ;
    return -1;
}

namedWindow( "Display window", WINDOW_AUTOSIZE ); // Create a window for display.
imshow( "Display window", image );                // Show our image inside it.

waitKey(0); // Wait for a keystroke in the window
return 0;

} I got error message: Error error LNK1104: cannot open file 'opencv_core231d.lib'
What's wrong?

Hi,

I have downloaded and installed OpenCV 2.4.6. I am new about OpenCV. I have followed the instructions in http://docs.opencv.org/trunk/doc/tutorials/introduction/windows_visual_studio_Opencv/windows_visual_studio_Opencv.html#windows-visual-studio-how-to

I could not get where i will paste or write codes. I could not open any code page in my project.