OpenCV
OpenCVDetect CandleOpenCV Part IConfigure Visual StudioOpen VC++
Directories configuration: Tools > Options > Projects and
Solutions > VC++ Directories Choose "Show directories for:
Include files" Add "Folder OpenCV>\include\opencv" Configure
Visual Studio (2)Choose "Show directories for: Library files" Add
"\lib" Choose "Show directories for: Source files" Add "\src\cv
"Add "\src\cvaux "Add "\src\cxcore "Add "\src\highgui"Configure
your ProjectOpen Linker Input properties: Configuration Properties
> Linker > Input edit "Additional Dependencies"Add
"cv210.lib"Add "cxcore210.lib" Add
"highgui210.lib"IplImageIplImagecvQueryFrame(CvCapture*
capture)cvCreateImage(CvSize size, int depth, int
channels)cvLoadImage(const char* filename, int
iscolor=CV_LOAD_IMAGE_COLOR)cvReleaseImage(IplImage** image)
HighGuiHighGuicvNamedWindow(const char* name, int
flags)cvShowImage(const char* name, const CvArr*
image)cvWaitKey(int delay=0)cvDestroyWindow(const char*
name)cvDestroyAllWindows()
Sample #1#include #include #include
int main( int argc, char** argv ) {IplImage* img = cvLoadImage(
photo.jpg);// photo.jpgcvNamedWindow( Example1, CV_WINDOW_AUTOSIZE
);// cvShowImage( Example1, img );// cvWaitKey(0); // Wait for any
keycvReleaseImage( &img ); // Clear MemorycvDestroyWindow(
Example1 ); // }Sample #1
DrawingWrite StringcvInitFont(CvFont*font, intfontFace,
doublehscale, doublevscale, doubleshear=0, intthickness=1,
intlineType=8)cvPutText(CvArr*img, const char*text,CvPointorg,
const CvFont*font,CvScalarcolor)Draw
CirclecvCircle(CvArr*img,CvPointcenter, intradius,CvScalarcolor,
intthickness=1, intlineType=8, intshift=0)Draw
RectanglecvRectangle(CvArr*img,CvPointpt1,CvPointpt2,CvScalarcolor,
intthickness=1, intlineType=8, intshift=0)Draw
LinecvLine(CvArr*img,CvPointpt1,CvPointpt2,CvScalarcolor,
intthickness=1, intlineType=8, intshift=0)Sample #2//Print
stringCvFont font;cvInitFont(&font, CV_FONT_HERSHEY_SIMPLEX,
1.0, 1.0, 0, 1, CV_AA);cvPutText(img,"Hello", cvPoint(20,20),
&font, cvScalar(255, 255, 255, 0));
//Draw
x-markcvLine(img,cvPoint(0,0),cvPoint(10,10),cvScalar(0,0,255,0))cvLine(img,cvPoint(10,0),cvPoint(0,10),cvScalar(0,0,255,0))
Sample #2
Color FilterAccess image data RGB imageImgHeight = x , ImgWidth
= yImage[x][y] = (img->imageData + x * img->widthStep)+
(3*y)Red Channel = Image[x][y] + 2Green Channel = Image[x][y] +
1Blue Channel = Image[x][y]
Sample #3//Convert image to red channelvoid cutoff_gb (
IplImage* img ) {for( int x=0; xheight; x++ ) {uchar* ptr =
(uchar*) (img->imageData + x * img->widthStep);for( int y=0;
ywidth; y++ ) {ptr[3*y] = 0;ptr[3*y+1] = 0;}}}Sample #3
Color Filter(2)Convert color
spacecvCvtColor(CvArr*src,CvArr*dst, intcode)code = X2Y (such
asRGB2GRAY , RGB2HSV)Blur imagecvSmooth(CvArr*src,CvArr*dst,
intsmoothtype=CV_GAUSSIAN, intparam1=3, intparam2=0)Cut
thresholdcvThreshold(CvArr*src,CvArr*dst, doublethreshold,
doublemaxValue, intthresholdType)
Threshold type
Threshold type(2)
OpenCV Part IICameraGet Capture from cameraCvCapture* capture =
cvCreateCameraCapture( int index );Get Image from captureIplImage
*img = cvQueryFrame( capture );Sample #4//Capture from
cameraCvCapture* capture = cvCreateCameraCapture( 0 );IplImage* img
= cvQueryFrame( capture );
cvNamedWindow( "Input", CV_WINDOW_AUTOSIZE );
while(cvWaitKey(5) != 27) // wait 5 ms for press
ESC{cvShowImage( "Input", img );img = cvQueryFrame( capture
);}cvDestroyAllWindows();Detect CircleIplImage* temp =
cvCreateImage(cvGetSize(img),IPL_DEPTH_8U,1);cvCvtColor(img,temp,CV_RGB2GRAY);cvSmooth(temp,temp,CV_GAUSSIAN,7,7);CvMemStorage*
MemStorage = cvCreateMemStorage(0);CvSeq* Circles =
cvHoughCircles(temp,MemStorage,CV_HOUGH_GRADIENT,DP,MIN_DIST,200,100);for
(int i = 0; i < Circles->total; i++) {float* c =
(float*)cvGetSeqElem( Circles, i );if( cvRound(c[2]) <
MIN_RADIUS || cvRound(c[2]) > MAX_RADIUS)continue;
//Draw cvCircle( result, cvPoint(cvRound(c[0]),cvRound(c[1])),3,
CV_RGB(0,255,0), -1, 8, 0 );cvCircle( result,
cvPoint(cvRound(c[0]),cvRound(c[1])),cvRound(c[2]),
CV_RGB(255,0,0), 3, 8, 0 );//char
radius_word[100];sprintf(radius_word,"%d",cvRound(c[2]));cvPutText(result,radius_word,
cvPoint(cvRound(c[0]),cvRound(c[1])), &font, cvScalar(255, 0,
0, 0));}Detect Circle
ROICvRectcvRect( int x, int y, int width, int height ) ROI
(Region Of
Interest)cvSetImageROI(IplImage*image,CvRectrect)cvResetImageROI(IplImage*image)cvCopy(CvArr*src,CvArr*dst,
CvArr*mask=NULL)MissionMissionCapture from camera
cvCvtColor
cvSmooth
cvHoughCircles
Cut ROI
