구차니의 잡동사니 모음

pi@raspberrypi ~/src/cvmp $ DISPLAY=:0.0 ./cvmp.o

HIGHGUI ERROR: libv4l unable convert to requested pixfmt

세그멘테이션 오류

pi@raspberrypi ~/src/cvmp $ DISPLAY=:0.0 ./cvmp.o

HIGHGUI ERROR: libv4l unable convert to requested pixfmt

세그멘테이션 오류

pi@raspberrypi ~/src/cvmp $ DISPLAY=:0.0 ./cvmp.o

select timeout

select timeout

select timeout 

$ cat mp.cpp

#include <iostream>

int main(int argc, char **argv)

{

        #pragma omp parallel

        for(;;)

        {

                int a = 0;

                a++;

        }

        return 0 ;

}

$ g++ -fopenmp mp.cpp

$ ./a.out

$ pstree

init─┬─avahi-daemon───avahi-daemon

     ├─console-kit-dae───64*[{console-kit-dae}]

     ├─cron

     ├─2*[dbus-daemon]

     ├─dbus-launch

     ├─dhcpcd

     ├─7*[getty]

     ├─gvfs-afc-volume───{gvfs-afc-volume}

     ├─gvfs-gdu-volume───{gvfs-gdu-volume}

     ├─gvfs-gphoto2-vo

     ├─gvfsd

     ├─gvfsd-trash───{gvfsd-trash}

     ├─2*[ifplugd]

     ├─lightdm─┬─Xorg

     │         ├─lightdm─┬─lxsession─┬─lxpanel───3*[{lxpanel}]

     │         │         │           ├─openbox

     │         │         │           ├─pcmanfm───{pcmanfm}

     │         │         │           ├─ssh-agent

     │         │         │           └─{lxsession}

     │         │         └─{lightdm}

     │         └─2*[{lightdm}]

     ├─lxpolkit───{lxpolkit}

     ├─menu-cached───{menu-cached}

     ├─ntpd

     ├─polkitd───2*[{polkitd}]

     ├─rsyslogd───3*[{rsyslogd}]

     ├─sshd─┬─sshd───sshd───bash───a.out───3*[{a.out}]

     │      └─sshd───sshd───bash───pstree

     ├─thd

     ├─udevd───2*[udevd]

     └─udisks-daemon─┬─udisks-daemon

                     └─{udisks-daemon}

$ top

top - 13:00:53 up  4:21,  2 users,  load average: 0.54, 0.28, 0.16

Tasks: 109 total,   2 running, 107 sleeping,   0 stopped,   0 zombie

%Cpu0  :100.0 us,  0.0 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st

%Cpu1  :100.0 us,  0.0 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st

%Cpu2  :100.0 us,  0.0 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st

%Cpu3  : 99.7 us,  0.3 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st

KiB Mem:    883168 total,   779332 used,   103836 free,    70232 buffers

KiB Swap:   102396 total,        0 used,   102396 free,   622940 cached

  PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND

16224 pi        20   0 27992  900  784 R 399.2  0.1   0:36.16 a.out 

$ cat mousecb.cpp

#include <opencv2/core/core.hpp>

#include <opencv2/highgui/highgui.hpp>

#include <opencv2/imgproc/imgproc.hpp>

#include <iostream>

using namespace std;

using namespace cv;

Point mpos(0,0);

void CallBackFunc(int event, int x, int y, int flags, void* userdata)

{

cout << "pos (" << x << "," << y << ") ";

mpos.x = x;

mpos.y = y;

switch(event)

{

case EVENT_MOUSEMOVE:

cout << "EVENT_MOUSEMOVE" << endl;

break;

case EVENT_LBUTTONDOWN:

cout << "EVENT_LBUTTONDOWN" << endl;

break;

case EVENT_LBUTTONUP:

cout << "EVENT_LBUTTONUP" << endl;

break;

case EVENT_RBUTTONDOWN:

cout << "EVENT_RBUTTONDOWN" << endl;

break;

case EVENT_RBUTTONUP:

cout << "EVENT_RBUTTONUP" << endl;

break;

case EVENT_MBUTTONDOWN:

cout << "EVENT_MBUTTONDOWN" << endl;

break;

case EVENT_MBUTTONUP:

cout << "EVENT_MBUTTONUP" << endl;

break;

case EVENT_LBUTTONDBLCLK:

cout << "EVENT_LBUTTONDBLCLK" << endl;

break;

case EVENT_RBUTTONDBLCLK:

cout << "EVENT_RBUTTONDBLCLK" << endl;

break;

case EVENT_MBUTTONDBLCLK:

cout << "EVENT_MBUTTONDBLCLK" << endl;

break;

/*

case EVENT_MOUSEWHEEL:

cout << "EVENT_MOUSEWHEEL" << endl;

break;

case EVENT_MOUSEHWHEEL:

cout << "EVENT_MOUSEHWHEEL" << endl;

break;

*/

}

}

int main(int argc, char** argv)

{

// Read image from file

Mat img = imread("MyPic.JPG");

//if fail to read the image

if ( img.empty() )

{

cout << "Error loading the image" << endl;

return -1;

}

//Create a window

namedWindow("My Window", 1);

//set the callback function for any mouse event

setMouseCallback("My Window", CallBackFunc, NULL);

//show the image

imshow("My Window", img);

for(;;)

{

rectangle(img, Point(mpos.x - 10, mpos.y - 10),

Point(mpos.x + 10, mpos.y + 10),

Scalar(0,0,0),2,8,0);

imshow("My Window", img);

// Wait until user press some key

if(waitKey(30) >= 0) break;

}

return 0;

} 

void CallBackFunc_Mouse(int event, int x, int y, int flags, void* userdata)

{

switch(event)

{

case EVENT_MOUSEMOVE:

//x,y

break;

case EVENT_LBUTTONDOWN:

case EVENT_LBUTTONUP:

case EVENT_RBUTTONDOWN:

case EVENT_RBUTTONUP:

case EVENT_MBUTTONDOWN:

case EVENT_MBUTTONUP:

case EVENT_LBUTTONDBLCLK:

case EVENT_RBUTTONDBLCLK:

case EVENT_MBUTTONDBLCLK:

// case EVENT_MOUSEWHEEL:

// case EVENT_MOUSEHWHEEL:

}

}

setMouseCallback("My Window", CallBackFunc_Mouse, NULL); 

enum   cv::MouseEventFlags { 

  cv::EVENT_FLAG_LBUTTON = 1, 

  cv::EVENT_FLAG_RBUTTON = 2, 

  cv::EVENT_FLAG_MBUTTON = 4, 

  cv::EVENT_FLAG_CTRLKEY = 8, 

  cv::EVENT_FLAG_SHIFTKEY = 16, 

  cv::EVENT_FLAG_ALTKEY = 32 

}

enum   cv::MouseEventTypes { 

  cv::EVENT_MOUSEMOVE = 0, 

  cv::EVENT_LBUTTONDOWN = 1, 

  cv::EVENT_RBUTTONDOWN = 2, 

  cv::EVENT_MBUTTONDOWN = 3, 

  cv::EVENT_LBUTTONUP = 4, 

  cv::EVENT_RBUTTONUP = 5, 

  cv::EVENT_MBUTTONUP = 6, 

  cv::EVENT_LBUTTONDBLCLK = 7, 

  cv::EVENT_RBUTTONDBLCLK = 8, 

  cv::EVENT_MBUTTONDBLCLK = 9, 

  cv::EVENT_MOUSEWHEEL = 10, 

  cv::EVENT_MOUSEHWHEEL = 11 

}

[링크 : http://docs.opencv.org/master/d7/dfc/group__highgui.html#gsc.tab=0] 

void CallBackFunc(int event, int x, int y, int flags, void* userdata)

{

     if  ( event == EVENT_LBUTTONDOWN )

     {

          cout << "Left button of the mouse is clicked - position (" << x << ", " << y << ")" << endl;

     }

     else if  ( event == EVENT_RBUTTONDOWN )

     {

          cout << "Right button of the mouse is clicked - position (" << x << ", " << y << ")" << endl;

     }

     else if  ( event == EVENT_MBUTTONDOWN )

     {

          cout << "Middle button of the mouse is clicked - position (" << x << ", " << y << ")" << endl;

     }

     else if ( event == EVENT_MOUSEMOVE )

     {

          cout << "Mouse move over the window - position (" << x << ", " << y << ")" << endl;

     }

}

setMouseCallback("My Window", CallBackFunc, NULL);

[링크 : http://opencv-srf.blogspot.kr/2011/11/mouse-events.html] 

void onMouse( int event, int x, int y, int, void* )

[링크 : https://github.com/Itseez/opencv/blob/master/samples/cpp/ffilldemo.cpp]

    [링크 : http://docs.opencv.org/modules/highgui/doc/user_interface.html#setmousecallback] 

Mat img;

Mat templ;

Mat result;

int match_method; // 6가지 종류의 매칭 방법(0~5)

double minVal; double maxVal; Point minLoc; Point maxLoc;

img = imread( argv[1], 1 );

templ = imread( argv[2], 1 );

    matchTemplate( img, templ, result, match_method );

    normalize( result, result, 0, 1, NORM_MINMAX, -1, Mat() );

    minMaxLoc( result, &minVal, &maxVal, &minLoc, &maxLoc, Mat() );

    if( match_method  == CV_TM_SQDIFF || match_method == CV_TM_SQDIFF_NORMED )

        { matchLoc = minLoc; }

    else

        { matchLoc = maxLoc; }

    rectangle( img_display, matchLoc, Point( matchLoc.x + templ.cols , matchLoc.y + templ.rows ), Scalar::all(0), 2, 8, 0 );

    rectangle( result, matchLoc, Point( matchLoc.x + templ.cols , matchLoc.y + templ.rows ), Scalar::all(0), 2, 8, 0 );

[링크 : http://docs.opencv.org/doc/tutorials/imgproc/histograms/template_matching/template_matching.html]

C++: void matchTemplate(InputArray image, InputArray templ, OutputArray result, int method)

[링크 : http://docs.opencv.org/modules/imgproc/doc/object_detection.html#matchtemplate] 

C++: void normalize(InputArray src, OutputArray dst, double alpha=1, double beta=0, int norm_type=NORM_L2, int dtype=-1, InputArray mask=noArray() )

C++: void normalize(const SparseMat& src, SparseMat& dst, double alpha, int normType)

[링크 : http://docs.opencv.org/modules/core/doc/operations_on_arrays.html#normalize] 

C++: void minMaxLoc(InputArray src, double* minVal, double* maxVal=0, Point* minLoc=0, Point* maxLoc=0, InputArray mask=noArray())

C++: void minMaxLoc(const SparseMat& a, double* minVal, double* maxVal, int* minIdx=0, int* maxIdx=0 )

[링크 : http://docs.opencv.org/modules/core/doc/operations_on_arrays.html#minmaxloc] 

$ wget https://raw.githubusercontent.com/Itseez/opencv/master/samples/cpp/tutorial_code/Histograms_Matching/MatchTemplate_Demo.cpp

$ g++  -lopencv_imgproc -lopencv_core -lopencv_highgui MatchTemplate_Demo.cpp -o b.out

$ ./b.out 1.jpg 2.jpg