1.0.x-learning opencv and MFC mixed programming-video motion detection

Source code: http://download.csdn.net/detail/nuptboyzhb/3961668

New Content in version 1.0.x

Video motion detection

Ø create menu items, learning opencv --> opencvr entry --> video motion detection

The menu items are set as follows:

Create a Class Wizard

ØEdit code

Voidccvmfcview: onmytestsport ()

{

// Todo: add your command handler codehere

// Alt + F8 sort out the code

Cvcapture * capture;

Capture = cvcreatecameracapture (0); // enable the camera

If (capture = NULL)

{

MessageBox ("no camera is detected. Check whether the camera is correctly installed ");

}

Else

{

Cstring windowname1 = "camera ";

Iplimage * frame1 = 0; // the first frame.

Iplimage * frame2 = 0; // second Frame

Iplimage * frame_sub = 0; // frames after subtraction

Iplimage * pimg8u = NULL; // grayscale chart

//

Assert (capture! = NULL); // if it is not enabled, it is interrupted.

Cvnamedwindow (windowname1, cv_window_autosize );

Frame1 = cvqueryframe (capture );

Frame_sub = cvcloneimage (frame1 );

While (1)

{

Frame2 = cvqueryframe (capture );

If (! Frame2)

{

Break;

}

Cvabsdiff (frame1, frame2, frame_sub );

Frame1 = cvcloneimage (frame2 );

Cvmovewindow (FIG, 150,200 );

Cvshowimage (windowname1, frame_sub );

// Create a bitmap

Pimg8u = cvcreateimage (cvgetsize (frame_sub), ipl_depth_8u, 1 );

Cvcvtcolor (frame_sub, pimg8u, cv_bgr2gray); // color grayscale

// -------------- Calculate the histogram -----------------------------

Iplimage * SRC;

Iplimage * histimg = 0;

Cvhistogram * hist = 0;

Int hdims = 256; // Number of Hist partitions, the higher the accuracy

Src = cvcloneimage (pimg8u );

Float hranges_arr [] ={ 0,255 };

Float * hranges = hranges_arr;

Int bin_w;

Float max_val;

Int I;

Cvnamedwindow ("histogram", 0 );

Hist = cvcreatehist (1, & hdims, cv_hist_array, & hranges, 1); // calculates the Histogram

Histimg = cvcreateimage (cvsize (320,200), 8, 3 );

Cvzero (histimg );

Cvcalchist (& SRC, Hist, 0, 0); // calculate the Histogram

Cvgetminmaxhistvalue (Hist, 0, & max_val, 0, 0); // you can specify the maximum value only.

Cvconvertscale (hist-> bins, hist-> bins,

Max_val? 255./max_val: 0., 0); // scale the bin to the interval [0,255]

Cvzero (histimg );

Bin_w = histimg-> width/hdims; // hdims: number of entries, then bin_w is the width

// Draw a Histogram

For (I = 0; I

{

Double val = (cvgetreal1d (hist-> bins, I) * histimg-> height/255 );

Cvscalar color = cv_rgb (255,255, 0); // (HSV 2rgb (I * 180.f/ hdims );

Cvrectangle (histimg, cvpoint (I * bin_w, histimg-> height ),

Cvpoint (I + 1) * bin_w, (INT) (histimg-> height-Val )),

Color, 1, 8, 0 );

}

Cvmovewindow ("histogram", 550,200 );

Cvshowimage ("histogram", histimg );

//------------------------------------------------------

Char c = cvwaitkey (1 );

If (C = 27)

{

Break;

}

}

Cvreleasecapture (& capture );

Cvdestroywindow (windowname1 );

Cvdestroywindow ("histogram ");

}

}