int main( int argc, char** argv )
{
char* filename = argc == 2 ? argv[1] : (char*)"fruits.jpg";
if( (image = cvLoadImage( filename, 1)) == 0 )
return -1;
// Create the output image
cedge = cvCreateImage(cvSize(image->width,image->height), IPL_DEPTH_8U, 3);
// Convert to grayscale
gray = cvCreateImage(cvSize(image->width,image->height), IPL_DEPTH_8U, 1);
edge = cvCreateImage(cvSize(image->width,image->height), IPL_DEPTH_8U, 1);
cvCvtColor(image, gray, CV_BGR2GRAY);
// Create a window
cvNamedWindow(wndname, 1);
// create a toolbar
cvCreateTrackbar(tbarname, wndname, &edge_thresh, 100, on_trackbar);
// Show the image
on_trackbar(0);
// Wait for a key stroke; the same function arranges events processing
cvWaitKey(0);
cvReleaseImage(&image);
cvReleaseImage(&gray);
cvReleaseImage(&edge);
cvDestroyWindow(wndname);
return 0;
}
int contours2( int argc, char** argv)
{
cv::CommandLineParser parser(argc, argv, "{help h||}");
if (parser.has("help"))
{
help();
return 0;
}
Mat img = Mat::zeros(w, w, CV_8UC1);
//Draw 6 faces
for( int i = 0; i < 6; i++ )
{
int dx = (i%2)*250 - 30;
int dy = (i/2)*150;
const Scalar white = Scalar(255);
const Scalar black = Scalar(0);
if( i == 0 )
{
for( int j = 0; j <= 10; j++ )
{
double angle = (j+5)*CV_PI/21;
line(img, Point(cvRound(dx+100+j*10-80*cos(angle)),
cvRound(dy+100-90*sin(angle))),
Point(cvRound(dx+100+j*10-30*cos(angle)),
cvRound(dy+100-30*sin(angle))), white, 1, 8, 0);
}
}
ellipse( img, Point(dx+150, dy+100), Size(100,70), 0, 0, 360, white, -1, 8, 0 );
ellipse( img, Point(dx+115, dy+70), Size(30,20), 0, 0, 360, black, -1, 8, 0 );
ellipse( img, Point(dx+185, dy+70), Size(30,20), 0, 0, 360, black, -1, 8, 0 );
ellipse( img, Point(dx+115, dy+70), Size(15,15), 0, 0, 360, white, -1, 8, 0 );
ellipse( img, Point(dx+185, dy+70), Size(15,15), 0, 0, 360, white, -1, 8, 0 );
ellipse( img, Point(dx+115, dy+70), Size(5,5), 0, 0, 360, black, -1, 8, 0 );
ellipse( img, Point(dx+185, dy+70), Size(5,5), 0, 0, 360, black, -1, 8, 0 );
ellipse( img, Point(dx+150, dy+100), Size(10,5), 0, 0, 360, black, -1, 8, 0 );
ellipse( img, Point(dx+150, dy+150), Size(40,10), 0, 0, 360, black, -1, 8, 0 );
ellipse( img, Point(dx+27, dy+100), Size(20,35), 0, 0, 360, white, -1, 8, 0 );
ellipse( img, Point(dx+273, dy+100), Size(20,35), 0, 0, 360, white, -1, 8, 0 );
}
//show the faces
namedWindow( "image", 1 );
imshow( "image", img );
//Extract the contours so that
vector<vector<Point> > contours0;
findContours( img, contours0, hierarchy, RETR_TREE, CHAIN_APPROX_SIMPLE);
contours.resize(contours0.size());
for( size_t k = 0; k < contours0.size(); k++ )
approxPolyDP(Mat(contours0[k]), contours[k], 3, true);
namedWindow( "contours", 1 );
createTrackbar( "levels+3", "contours", &levels, 7, on_trackbar );
on_trackbar(0,0);
waitKey();
return 0;
}
int main(int argc, char** argv)
{
const char* filename;
if(argc >= 2)
filename = argv[1];
else
filename = "image.jpg";
image_src = cv::imread(filename);
if(image_src.empty())
{
std::cout << "ERROR: Cannot open " << filename << std::endl;
return -1;
}
on_trackbar(0, (void *)0);
slider = 0;
cv::createTrackbar("Hough Threshold = Position + 20", "Display Image", &slider, slider_max, on_trackbar);
while(char(cv::waitKey(1)) != 'q'){}
return 0;
}
int connected_components( int argc, const char** argv )
{
CommandLineParser parser(argc, argv, keys);
if (parser.has("help"))
{
help();
return 0;
}
string inputImage = parser.get<string>(0);
img = imread(inputImage.c_str(), 0);
if(img.empty())
{
cout << "Could not read input image file: " << inputImage << endl;
return -1;
}
namedWindow( "Image", 1 );
imshow( "Image", img );
namedWindow( "Connected Components", 1 );
createTrackbar( "Threshold", "Connected Components", &threshval, 255, on_trackbar );
on_trackbar(threshval, 0);
waitKey(0);
return 0;
}
int main( int argc, char** argv )
{
int i, j;
CvMemStorage* storage = cvCreateMemStorage(0);
IplImage* img = cvCreateImage( cvSize(w,w), 8, 1 );
cvZero( img );
for( i=0; i < 6; i++ )
{
int dx = (i%2)*250 - 30;
int dy = (i/2)*150;
CvScalar white = cvRealScalar(255);
CvScalar black = cvRealScalar(0);
if( i == 0 )
{
for( j = 0; j <= 10; j++ )
{
double angle = (j+5)*CV_PI/21;
cvLine(img, cvPoint(cvRound(dx+100+j*10-80*cos(angle)),
cvRound(dy+100-90*sin(angle))),
cvPoint(cvRound(dx+100+j*10-30*cos(angle)),
cvRound(dy+100-30*sin(angle))), white, 1, 8, 0);
}
}
cvEllipse( img, cvPoint(dx+150, dy+100), cvSize(100,70), 0, 0, 360, white, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+115, dy+70), cvSize(30,20), 0, 0, 360, black, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+185, dy+70), cvSize(30,20), 0, 0, 360, black, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+115, dy+70), cvSize(15,15), 0, 0, 360, white, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+185, dy+70), cvSize(15,15), 0, 0, 360, white, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+115, dy+70), cvSize(5,5), 0, 0, 360, black, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+185, dy+70), cvSize(5,5), 0, 0, 360, black, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+150, dy+100), cvSize(10,5), 0, 0, 360, black, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+150, dy+150), cvSize(40,10), 0, 0, 360, black, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+27, dy+100), cvSize(20,35), 0, 0, 360, white, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+273, dy+100), cvSize(20,35), 0, 0, 360, white, -1, 8, 0 );
}
cvNamedWindow( "image", 1 );
cvShowImage( "image", img );
cvFindContours( img, storage, &contours, sizeof(CvContour),
CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0) );
// comment this out if you do not want approximation
contours = cvApproxPoly( contours, sizeof(CvContour), storage, CV_POLY_APPROX_DP, 3, 1 );
cvNamedWindow( "contours", 1 );
cvCreateTrackbar( "levels+3", "contours", &levels, 7, on_trackbar );
on_trackbar(0);
cvWaitKey(0);
cvReleaseMemStorage( &storage );
cvReleaseImage( &img );
return 0;
}
int main(int argc, _TCHAR* argv[])
{
g_image = cvLoadImage( "airplane.jpg" );
cvNamedWindow( "Contours", 1 );
cvCreateTrackbar( "Threshold", "Contours", &g_thresh, 255, on_trackbar );
on_trackbar(0);
cvWaitKey();
return 0;
}
/**
* @brief Capture the next frame and reset the trackbar
*
* @return Returns false if no frame are available
*
*/
bool nextFrame(){
Mat frame;
Mat featvector;
if (capture->nextFrame(frame)){
currframe.release();
frame.copyTo(currframe);
on_trackbar(0, this);
return true;
} else{
return false;
}
}
int main( int argc, char** argv )
{
if( argc != 2 || !(g_image = cvLoadImage(argv[1])) ){
printf("\nExample 8_2 Contour retreival using trackbar\nCall is:\n./ch8_ex8_2 image\n");
return -1;}
cvNamedWindow( "Contours", 1 );
cvCreateTrackbar(
"Threshold",
"Contours",
&g_thresh,
255,
on_trackbar
);
on_trackbar(0);
cvWaitKey();
return 0;
}
int main(int argc, char *argv[])
{
img = cv::imread(argv[1]);
cv::Mat img_b;
cvtColor(img, img_b, CV_RGB2GRAY);
cv::Mat edges;
Canny(img_b, edges, 50, 100);
// extract contours and heirarchy
cv::findContours(edges, contours, heirarchy, CV_RETR_TREE, CV_CHAIN_APPROX_NONE);
cv::namedWindow("Contours");
cv::createTrackbar("levels", "Contours", &levels, 15, on_trackbar);
// Initialize by drawing the top level contours (as levels is initialized to 0)
on_trackbar(0, 0);
while( char(cv::waitKey(1)) != 'q') {}
return 0;
}
int main( int argc, char** argv )
{
param1 = 100;
param2 = 2000;
// open input image
original = cvLoadImage("pic6.png",0);
cvNamedWindow("input");
cvShowImage("input", original );
cvNamedWindow(wndname, 0);
cvCreateTrackbar( tbarname1, wndname, ¶m1, 255, on_trackbar );
cvCreateTrackbar( tbarname2, wndname, ¶m2, 30000, on_trackbar );
// Call to update the view
for(;;)
{
int c;
// Call to update the view
on_trackbar(0);
c = cvWaitKey(0);
if( c == 27 )
break;
}
cvReleaseImage( &original );
cvReleaseImage( &originalThr );
cvReleaseImage( &displayedImage );
cvDestroyWindow( wndname );
return 0;
}
int find_rectangle(IplImage * & g_image) {
int i, c;
// create memory storage that will contain all the dynamic data
storage = cvCreateMemStorage(0);
// load i-th image
img0 = g_image;
img = cvCloneImage( img0 );
// create window and a trackbar (slider) with parent "image" and set callback
// (the slider regulates upper threshold, passed to Canny edge detector)
cvNamedWindow( wndname, 1 );
cvCreateTrackbar( "canny thresh", wndname, &thresh, 1000, on_trackbar );
// force the image processing
on_trackbar(0);
// wait for key.
// Also the function cvWaitKey takes care of event processing
c = cvWaitKey(0);
// release both images
cvReleaseImage( &img );
cvReleaseImage( &img0 );
// clear memory storage - reset free space position
cvClearMemStorage( storage );
cvDestroyWindow( wndname );
return 0;
}
int main( int argc, char** argv )
{
char* filename = argc == 2 ? argv[1] : (char*)"stuff.jpg";
if( (gray = cvLoadImage( filename, 0 )) == 0 )
return -1;
printf( "Hot keys: \n"
"\tESC - quit the program\n"
"\tC - use C/Inf metric\n"
"\tL1 - use L1 metric\n"
"\tL2 - use L2 metric\n"
"\t3 - use 3x3 mask\n"
"\t5 - use 5x5 mask\n"
"\t0 - use precise distance transform\n"
"\tv - switch Voronoi diagram mode on/off\n"
"\tENTER - loop through all the modes\n" );
dist = cvCreateImage( cvGetSize(gray), IPL_DEPTH_32F, 1 );
dist8u1 = cvCloneImage( gray );
dist8u2 = cvCloneImage( gray );
dist8u = cvCreateImage( cvGetSize(gray), IPL_DEPTH_8U, 3 );
dist32s = cvCreateImage( cvGetSize(gray), IPL_DEPTH_32S, 1 );
edge = cvCloneImage( gray );
labels = cvCreateImage( cvGetSize(gray), IPL_DEPTH_32S, 1 );
cvNamedWindow( wndname, 1 );
cvCreateTrackbar( tbarname, wndname, &edge_thresh, 255, on_trackbar );
for(;;)
{
int c;
// Call to update the view
on_trackbar(0);
c = cvWaitKey(0);
if( (char)c == 27 )
break;
if( (char)c == 'c' || (char)c == 'C' )
dist_type = CV_DIST_C;
else if( (char)c == '1' )
dist_type = CV_DIST_L1;
else if( (char)c == '2' )
dist_type = CV_DIST_L2;
else if( (char)c == '3' )
mask_size = CV_DIST_MASK_3;
else if( (char)c == '5' )
mask_size = CV_DIST_MASK_5;
else if( (char)c == '0' )
mask_size = CV_DIST_MASK_PRECISE;
else if( (char)c == 'v' )
build_voronoi ^= 1;
else if( (char)c == '\n' || (char)c == '\r' )
{
if( build_voronoi )
{
build_voronoi = 0;
mask_size = CV_DIST_MASK_3;
dist_type = CV_DIST_C;
}
else if( dist_type == CV_DIST_C )
dist_type = CV_DIST_L1;
else if( dist_type == CV_DIST_L1 )
dist_type = CV_DIST_L2;
else if( mask_size == CV_DIST_MASK_3 )
mask_size = CV_DIST_MASK_5;
else if( mask_size == CV_DIST_MASK_5 )
mask_size = CV_DIST_MASK_PRECISE;
else if( mask_size == CV_DIST_MASK_PRECISE )
build_voronoi = 1;
}
}
cvReleaseImage( &gray );
cvReleaseImage( &edge );
cvReleaseImage( &dist );
cvReleaseImage( &dist8u );
cvReleaseImage( &dist8u1 );
cvReleaseImage( &dist8u2 );
cvReleaseImage( &dist32s );
cvReleaseImage( &labels );
cvDestroyWindow( wndname );
return 0;
}
int main(int argc, char* argv[])
{
int i, j;
CvMemStorage* storage = cvCreateMemStorage(0);
IplImage* img = cvCreateImage( cvSize(w,w), 8, 1 );
IplImage* img32f = cvCreateImage( cvSize(w,w), IPL_DEPTH_32F, 1 );
IplImage* img32s = cvCreateImage( cvSize(w,w), IPL_DEPTH_32S, 1 );
IplImage* img3 = cvCreateImage( cvSize(w,w), 8, 3 );
(void)argc; (void)argv;
help();
cvZero( img );
for( i=0; i < 6; i++ )
{
int dx = (i%2)*250 - 30;
int dy = (i/2)*150;
CvScalar white = cvRealScalar(255);
CvScalar black = cvRealScalar(0);
if( i == 0 )
{
for( j = 0; j <= 10; j++ )
{
double angle = (j+5)*CV_PI/21;
cvLine(img, cvPoint(cvRound(dx+100+j*10-80*cos(angle)),
cvRound(dy+100-90*sin(angle))),
cvPoint(cvRound(dx+100+j*10-30*cos(angle)),
cvRound(dy+100-30*sin(angle))), white, 3, 8, 0);
}
}
cvEllipse( img, cvPoint(dx+150, dy+100), cvSize(100,70), 0, 0, 360, white, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+115, dy+70), cvSize(30,20), 0, 0, 360, black, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+185, dy+70), cvSize(30,20), 0, 0, 360, black, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+115, dy+70), cvSize(15,15), 0, 0, 360, white, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+185, dy+70), cvSize(15,15), 0, 0, 360, white, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+115, dy+70), cvSize(5,5), 0, 0, 360, black, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+185, dy+70), cvSize(5,5), 0, 0, 360, black, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+150, dy+100), cvSize(10,5), 0, 0, 360, black, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+150, dy+150), cvSize(40,10), 0, 0, 360, black, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+27, dy+100), cvSize(20,35), 0, 0, 360, white, -1, 8, 0 );
cvEllipse( img, cvPoint(dx+273, dy+100), cvSize(20,35), 0, 0, 360, white, -1, 8, 0 );
}
cvNamedWindow( "image", 1 );
cvShowImage( "image", img );
cvConvert( img, img32f );
findCComp( img32f );
cvConvert( img32f, img32s );
cvFindContours( img32s, storage, &contours, sizeof(CvContour),
CV_RETR_CCOMP, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0) );
//cvFindContours( img, storage, &contours, sizeof(CvContour),
// CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0) );
{
const char* attrs[] = {"recursive", "1", 0};
cvSave("contours.xml", contours, 0, 0, cvAttrList(attrs, 0));
contours = (CvSeq*)cvLoad("contours.xml", storage, 0, 0);
}
// comment this out if you do not want approximation
contours = cvApproxPoly( contours, sizeof(CvContour), storage, CV_POLY_APPROX_DP, 3, 1 );
cvNamedWindow( "contours", 1 );
cvCreateTrackbar( "levels+3", "contours", &levels, 7, on_trackbar );
{
CvRNG rng = cvRNG(-1);
CvSeq* tcontours = contours;
cvCvtColor( img, img3, CV_GRAY2BGR );
while( tcontours->h_next )
tcontours = tcontours->h_next;
for( ; tcontours != 0; tcontours = tcontours->h_prev )
{
CvScalar color;
color.val[0] = cvRandInt(&rng) % 256;
color.val[1] = cvRandInt(&rng) % 256;
color.val[2] = cvRandInt(&rng) % 256;
color.val[3] = cvRandInt(&rng) % 256;
cvDrawContours(img3, tcontours, color, color, 0, -1, 8, cvPoint(0,0));
if( tcontours->v_next )
{
color.val[0] = cvRandInt(&rng) % 256;
color.val[1] = cvRandInt(&rng) % 256;
color.val[2] = cvRandInt(&rng) % 256;
color.val[3] = cvRandInt(&rng) % 256;
cvDrawContours(img3, tcontours->v_next, color, color, 1, -1, 8, cvPoint(0,0));
}
}
}
cvShowImage( "colored", img3 );
on_trackbar(0);
cvWaitKey(0);
cvReleaseMemStorage( &storage );
cvReleaseImage( &img );
cvReleaseImage( &img32f );
cvReleaseImage( &img32s );
cvReleaseImage( &img3 );
return 0;
}
int main(int argc, char **argv)
{
if (argc != 3)
{
help();
return 0;
}
char *image1name = argv[1];
char *image2name = argv[2];
//create two windows
cvNamedWindow(WINDOW1NAME, CV_WINDOW_NORMAL);
cvNamedWindow(WINDOW2NAME, CV_WINDOW_NORMAL);
//read two images with gray
pGrayImage1 = cvLoadImage(image1name, CV_LOAD_IMAGE_GRAYSCALE);
pGrayImage2 = cvLoadImage(image2name, CV_LOAD_IMAGE_GRAYSCALE);
//show two gray images
cvShowImage(WINDOW1NAME, pGrayImage1);
cvShowImage(WINDOW2NAME, pGrayImage2);
cvWaitKey(0);
//show image1 and with a track slider
cvNamedWindow(WINDOW1BINARYNAME, CV_WINDOW_NORMAL);
cvNamedWindow(WINDOW2BINARYNAME, CV_WINDOW_NORMAL);
pBinaryImage1 = cvCreateImage(cvGetSize(pGrayImage1), IPL_DEPTH_8U, 1);
pBinaryImage2 = cvCreateImage(cvGetSize(pGrayImage2), IPL_DEPTH_8U, 1);
int threshold = 0;
cvCreateTrackbar(TRACKNAME, WINDOW1BINARYNAME, &threshold, 254, on_trackbar);
on_trackbar(1);
int c = cvWaitKey(0);
printf("%c, %d, %x, %x, %x, %x\n", c, c, c, 'a', 'o', 'x');
IplImage * pImageXor = cvCreateImage(cvGetSize(pGrayImage1), IPL_DEPTH_8U, 1);
if (c == 0x100078) {
cvXor(pBinaryImage1, pBinaryImage2, pImageXor, NULL);
cvNamedWindow(WINDOWXORNAME, CV_WINDOW_NORMAL);
cvShowImage(WINDOWXORNAME, pImageXor);
} else if (c == 0x100061) {
cvAnd(pBinaryImage1, pBinaryImage2, pImageXor, NULL);
cvNamedWindow(WINDOWANDNAME, CV_WINDOW_NORMAL);
cvShowImage(WINDOWANDNAME, pImageXor);
} else if (c == 0x10006f) {
cvOr(pBinaryImage1, pBinaryImage2, pImageXor, NULL);
cvNamedWindow(WINDOWORNAME, CV_WINDOW_NORMAL);
cvShowImage(WINDOWORNAME, pImageXor);
} else {
goto err_input;
}
int s = cvWaitKey(0);
char* filename = NULL;
if (s == 0x100073) {
if (c == 0x100078) {
filename = "xor.jpg";
} else if (c == 0x10006f) {
filename = "or.jpg";
} else if (c == 0x100061) {
filename = "and.jpg";
}
cvSaveImage(filename, pImageXor, 0);
}
//xor two images
/*cvOr(pGrayImage1, pGrayImage2, pImageXor, NULL);
cvNamedWindow("xor", CV_WINDOW_NORMAL);
cvShowImage("xor", pImageXor);
cvWaitKey(0);
cvReleaseImage(&pImageXor);
cvDestroyWindow("xor");*/
err_input:
cvReleaseImage(&pImageXor);
cvReleaseImage(&pGrayImage1);
cvReleaseImage(&pGrayImage2);
cvReleaseImage(&pBinaryImage1);
cvReleaseImage(&pBinaryImage2);
cvDestroyWindow(WINDOW1NAME);
cvDestroyWindow(WINDOW2NAME);
cvDestroyWindow(WINDOW1BINARYNAME);
cvDestroyWindow(WINDOW2BINARYNAME);
return 0;
}
int main(int argc, char** argv){
// Set up variables
//set the camera capture
capture = cvCaptureFromCAM(0);
// create a new window with auto sizing
cvNamedWindow(window_name, 1);
// create a window
//cvNamedWindow("HSV Window", CV_WINDOW_AUTOSIZE);
// create a window
//cvNamedWindow("Grey Window", CV_WINDOW_AUTOSIZE);
// create a window
cvNamedWindow("Target", CV_WINDOW_AUTOSIZE);
cvNamedWindow("Target2", CV_WINDOW_AUTOSIZE);
cvNamedWindow("Before", CV_WINDOW_AUTOSIZE);
cvNamedWindow("First", CV_WINDOW_AUTOSIZE);
cvNamedWindow("Second", CV_WINDOW_AUTOSIZE);
cvNamedWindow("Before2", CV_WINDOW_AUTOSIZE);
cvNamedWindow("Third", CV_WINDOW_AUTOSIZE);
while(quit != 'q'){
//grab frame from webcam
g_image = cvQueryFrame(capture);
// display frame
cvShowImage(window_name,g_image);
on_trackbar(0);
//cvShowImage("HSV Window", g_gray );
//cvShowImage("Grey Window", g_grey );
somethingNew();
cvShowImage("Target", g_grey );
cvShowImage("Target2", g_gray );
/*something();
cvShowImage("blobOut", g_grey );*/
/*printf("Thresh is %d\n",new_thresh++);
if(new_thresh == 255){
new_thresh = 0;
}*/
//check for q to quit
quit = cvWaitKey(1);
// delay for a moment, delay is under 2 it doesn't seem to work
cvWaitKey(DELAY);
}
// before quitting it releases memory
cvReleaseCapture(&capture);
cvDestroyWindow(window_name);
return 0;
}