void event_mouse(int button, int state, int x, int y) {
int err;
if (state == GLUT_DOWN) { // Mouse down = find template
// Do hough transform to find ball center and radius
struct frame *fr = get_frame(active_window->frames, active_window->cur);
err = houghTransform(active_window, active_window->cur, x, y);
if (err) {
return;
}
fr->flag |= HAS_HOUGH;
active_window->guess.x = fr->hough.x;
active_window->guess.y = fr->hough.y;
// Make a subimage containing the template
CvRect r = cvRect(fr->hough.x-fr->hough.radius, fr->hough.y-fr->hough.radius, fr->hough.radius*2, fr->hough.radius*2);
CvMat *sub = cvCreateMatHeader(fr->hough.radius*2, fr->hough.radius*2, CV_32FC1);
cvGetSubRect(fr->image, sub, r);
active_window->tmpl = sub;
// Match (could be left out)
templateMatch(active_window, active_window->cur, MARGIN, sub);
fr->flag |= HAS_MATCH;
glutPostRedisplay();
// Calculate meters per pixel
active_window->mpp = atof(active_window->argv[2])/(fr->hough.radius*2);
printf("Getting mpp: %f/%f = %f\n", atof(active_window->argv[2]), fr->hough.radius*2, active_window->mpp);
}
}
Mat PAN::preprocess(Mat *image, Image *output,int parameter,String database){
output->x_left= 0;
output->x_right = image->cols;;
output->y_upper = 0;
output->y_lower = image->rows;
if (image->channels()>=2){
cvtColor(*image, *output->img, CV_BGR2GRAY);
}
//cropimage globally to get pan card and put it in output image
if (parameter == 1){
//assuming we have only the pancard as the image
//going to remove emblem
Point matchloc;
float percentage, threshold;
database =database+ "emblem.png";
Mat temp = imread(database);
if (temp.data == NULL){ cout << "hi there"; }
templateMatch(*image, temp, matchloc, threshold, percentage);
int width, height;
width = temp.size().width; height = temp.size().height;
Point boundary(matchloc.x + width, matchloc.y + height);
if (percentage >= 85){ output->y_upper = boundary.y; }
Mat mod(*image, Rect(Point(output->x_left, output->y_upper), Point(output->x_right, output->y_lower)));
//imshow("test1", mod);
//waitKey();
return mod; }
else if (parameter == 2){
//initializing panimage by removing the borders
output->img = image;
CropImage(output,10,10,0);
return *output->img;
}
}
int templateMatch(struct window *window, int frame, int diam, CvMat *tmpl) {
// Init
struct frame *fr = get_frame(window->frames, frame);
// printf("Guess is (%d, %d), diameter is %d\n", window->guess.x, window->guess.y, diam);
float init_x = (float)window->guess.x-diam, init_y = (float)window->guess.y-diam;
// See if we can guess were the ball might be
CvRect rect = cvRect(init_x, init_y, diam*2, diam*2);
// Make sure rect is with image
rect.x = rect.x < 0 ? 0 : rect.x;
rect.y = rect.y < 0 ? 0 : rect.y;
rect.width = rect.x+rect.width > fr->image->cols ? fr->image->cols-rect.x : rect.width;
rect.height = rect.y+rect.height > fr->image->rows ? fr->image->rows-rect.y : rect.height;
// Get sub rect
CvMat *sub = cvCreateMatHeader(rect.height, rect.width, CV_32F);
cvGetSubRect(fr->image, sub, rect);
CvMat *res = cvCreateMat(sub->rows - tmpl->rows+1, sub->cols - tmpl->cols+1, CV_32F);
// Match
cvMatchTemplate(sub, tmpl, res, CV_TM_SQDIFF);
// Find value and location of min = upper-left corner of template match
CvPoint pt;
double val;
cvMinMaxLoc(res, &val, 0, &pt, 0, 0);
// printf("#%d: value of match is %f\n", frame, val);
if (val > 20000000) { // Works on sample video
// printf("Doubling search area\n");
templateMatch(window, frame, diam*2, tmpl);
return 0;
}
// Match result
struct MatchResult mr;
mr.x = init_x+pt.x;
mr.y = init_y+pt.y;
mr.found = 1;
fr->match = mr;
window->guess.x = mr.x;
window->guess.y = mr.y;
return 0;
}
/********************** *
* Event handlers *
* *********************/
void event_key_special(int key, int x, int y) {
if (active_window->state == STATE_LOADING) {
return;
}
int step = 0, i;
switch (key) {
case GLUT_KEY_LEFT:
step = -1;
break;
case GLUT_KEY_RIGHT:
step = 1;
break;
case GLUT_KEY_UP:
step = 10;
break;
case GLUT_KEY_DOWN:
step = -10;
break;
case GLUT_KEY_HOME: // Perform match on all frames
for (i = 1; i <= active_window->nfr; i++) {
struct frame *fr = get_frame(active_window->frames, i);
if (fr->flag & HAS_MATCH) {
continue;
}
templateMatch(active_window, i, MARGIN, active_window->tmpl);
fr->flag |= HAS_MATCH;
calculate_speed(fr);
}
printf("Done matching\n");
}
// Update view
if (active_window->cur+step > 0 && active_window->cur+step <= active_window->nfr) {
active_window->cur += step;
glutPostRedisplay();
}
}
