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- // GlowLoop.cpp : Defines the entry point for the console application.
- //
- //#include "stdafx.h"
- /*
- int _tmain(int argc, _TCHAR* argv[])
- {
- return 0;
- }
- */
- #ifdef _CH_
- #pragma package <opencv>
- #endif
- #define CV_NO_BACKWARD_COMPATIBILITY
- #ifndef _EiC
- #include "cv.h"
- #include "highgui.h"
- #include <stdio.h>
- #include <ctype.h>
- #endif
- // Two windows, one to diaplay the output lines
- #define GLOW_WINDOW_NAME "Glow"
- // and one for the input image
- #define INPUT_WINDOW_NAME "Input"
- #define CONTROL_WINDOW_NAME GLOW_WINDOW_NAME
- IplImage *image=0, *smoothImage = 0, *edgeImage = 0, *cannyImage = 0, *greyImage = 0;
- // Our configuration parameters, which are adjusted by the sliders
- // Initial blurring of the iamge, to get rid of uninteresting details
- int smoothRadius = 2;
- // Parameters to the Canny edge-finder
- int lowThresh = 10;
- int highThresh = 100;
- // Shortest vector that we want to keep (as the short vectors are mostly noise we don't care about)
- int minLength = 100;
- // Apply straightening to our vectors to reduce the storage requirement in the projector
- int straightener = 10;
- void writeContours( CvSeq* contours );
- int main( int argc, char** argv )
- {
- CvCapture* capture = 0;
- int doWrite = 0;
- int levels = 3;
- CvSeq* contours = 0;
- //CvSeq* filteredContours = 0;
- CvMemStorage* contourStorage = cvCreateMemStorage(0);
- //filteredContours = cvCreateSeq( 0, sizeof(CvSeq), sizeof(CvSeq), storage );
- if( argc == 1 || (argc == 2 && strlen(argv[1]) == 1 && isdigit(argv[1][0])))
- capture = cvCaptureFromCAM( argc == 2 ? argv[1][0] - '0' : 0 );
- else if( argc == 2 )
- capture = cvCaptureFromAVI( argv[1] );
- if( !capture )
- {
- fprintf(stderr,"Could not initialize capturing...\n");
- return -1;
- }
- printf( "Hot keys: \n"
- "\tESC - quit the program\n"
- "\tSpacebar - write contours\n"
- );
- cvNamedWindow( GLOW_WINDOW_NAME, 1 );
- cvNamedWindow( INPUT_WINDOW_NAME, 1 );
- //cvSetMouseCallback( INPUT_WINDOW_NAME, on_mouse, 0 );
- cvCreateTrackbar( "Blur", CONTROL_WINDOW_NAME, &smoothRadius, 10, 0 );
- cvCreateTrackbar( "Canny low", CONTROL_WINDOW_NAME, &lowThresh, 256, 0 );
- cvCreateTrackbar( "Canny high", CONTROL_WINDOW_NAME, &highThresh, 256, 0 );
- cvCreateTrackbar( "Straighten", CONTROL_WINDOW_NAME, &straightener, 50, 0 );
- cvCreateTrackbar( "Min length", CONTROL_WINDOW_NAME, &minLength, 256, 0 );
- for(;;)
- {
- IplImage* frame = 0;
- int c;
- frame = cvQueryFrame( capture );
- if( !frame )
- break;
- if( !image )
- {
- /* allocate all the buffers */
- image = cvCreateImage( cvGetSize(frame), 8, 3 );
- image->origin = frame->origin;
- greyImage = cvCreateImage( cvGetSize(frame), 8, 1 );
- greyImage->origin = frame->origin;
- smoothImage = cvCreateImage( cvGetSize(frame), 8, 1 );
- smoothImage->origin = frame->origin;
- cannyImage = cvCreateImage( cvGetSize(frame), 8, 1 );
- cannyImage->origin = frame->origin;
- edgeImage = cvCreateImage( cvGetSize(frame), 8, 1 );
- edgeImage->origin = frame->origin;
- }
- cvCopy( frame, image, 0 );
- //cvCvtColor( image, hsv, CV_BGR2HSV );
- // copy input frame to a greyscale iamge
- cvCvtColor( frame, greyImage, CV_BGR2GRAY );
- if( smoothRadius > 0 )
- {
- int smoothWidth = (smoothRadius - 1 ) * 2 + 1;
- cvSmooth( greyImage, smoothImage, CV_GAUSSIAN, smoothWidth, smoothWidth );
- }
- else
- {
- // no smooth, so just copy
- cvCopy( greyImage, smoothImage, 0 );
- }
- //int g_thresh = 100;
- // threshold the image - a cheap alternative to canny
- //cvThreshold( greyImage, cannyImage, g_thresh, 255, CV_THRESH_BINARY );
- // Apply Canny edge-find
- int aperture = 3;
- cvCanny( smoothImage, cannyImage, lowThresh, highThresh, aperture );
- CvContourScanner scanner = cvStartFindContours(cannyImage, contourStorage, sizeof(CvContour),
- CV_RETR_LIST/*CV_RETR_EXTERNAL*/,
- CV_CHAIN_APPROX_SIMPLE);
- CvSeq* contour;
- while ((contour = cvFindNextContour(scanner)) != NULL)
- {
- double len = cvContourPerimeter(contour);
- if (len < minLength)
- {
- // contour too short - throw it away
- cvSubstituteContour(scanner, NULL);
- }
- else
- {
- // contour is long enough, so keep it
- // but apply some straightening to reduce the amount of storage we need to draw it with our projector
- CvSeq* c_new = cvApproxPoly(contour, sizeof(CvContour), contourStorage, CV_POLY_APPROX_DP, straightener, 0);
- cvSubstituteContour(scanner, c_new);
- }
- }
- contours = cvEndFindContours(&scanner);
- // clear our output image
- cvSet(edgeImage, cvScalar(0));
- // draw the finished set of contours into the output image
- cvDrawContours(
- edgeImage,
- contours,
- cvScalarAll(255),
- cvScalarAll(255),
- 100
- );
- if( doWrite != 0)
- {
- writeContours( contours );
- doWrite = 0;
- }
- //cvClearSeq( contours ); does not return the memory used by the contours! Need to clear contourStorage instead
- cvClearMemStorage(contourStorage);
- // Show our output image
- cvShowImage( GLOW_WINDOW_NAME, edgeImage );
- // Show the input image for reference
- cvShowImage( INPUT_WINDOW_NAME, image );
- c = cvWaitKey(10);
- if( (char) c == 27 ) // Hit Esc to quit the app
- break;
- switch( (char) c )
- {
- case ' ': // hit space to write a contour list
- doWrite = 1;
- break;
- case 'b':
- //backproject_mode ^= 1;
- break;
- case 'c':
- //track_object = 0;
- //cvZero( histimg );
- break;
- default:
- ;
- }
- }
- cvReleaseCapture( &capture );
- cvDestroyWindow(INPUT_WINDOW_NAME);
- cvDestroyWindow(GLOW_WINDOW_NAME);
- cvReleaseMemStorage( &contourStorage );
- return 0;
- }
- void writeContours( CvSeq* contours )
- {
- printf("%d contours:\n", contours->total );
- // loop over all the contours
- for( CvSeq* c=contours; c!=NULL; c=c->h_next )
- {
- CvSeqReader reader;
- cvStartReadSeq(c, &reader);
- const int points = c->total;
- //Each contour is a series of points:
- printf(" %d points:\n", points );
- for (int point = 0; point < points; ++point)
- {
- CvPoint p;
- CV_READ_SEQ_ELEM(p, reader);
- // Do stuff with p
- printf(" (%d,%d)\n", p.x, p.y );
- }
- }
- }
- //unused
- //*hsv = 0, *hue = 0, *mask = 0, *backproject = 0, *histimg = 0;
- //CvHistogram *hist = 0;
- /*
- int backproject_mode = 0;
- int select_object = 0;
- int track_object = 0;
- CvPoint origin;
- CvRect selection;
- CvRect track_window;
- CvBox2D track_box;
- CvConnectedComp track_comp;
- int hdims = 16;
- float hranges_arr[] = {0,180};
- float* hranges = hranges_arr;
- int vmin = 10, vmax = 256, smin = 30;
- */
- /*
- void on_mouse( int event, int x, int y, int flags, void* param )
- {
- if( !image )
- return;
- if( image->origin )
- y = image->height - y;
- if( select_object )
- {
- selection.x = MIN(x,origin.x);
- selection.y = MIN(y,origin.y);
- selection.width = selection.x + CV_IABS(x - origin.x);
- selection.height = selection.y + CV_IABS(y - origin.y);
- selection.x = MAX( selection.x, 0 );
- selection.y = MAX( selection.y, 0 );
- selection.width = MIN( selection.width, image->width );
- selection.height = MIN( selection.height, image->height );
- selection.width -= selection.x;
- selection.height -= selection.y;
- }
- switch( event )
- {
- case CV_EVENT_LBUTTONDOWN:
- origin = cvPoint(x,y);
- selection = cvRect(x,y,0,0);
- select_object = 1;
- break;
- case CV_EVENT_LBUTTONUP:
- select_object = 0;
- if( selection.width > 0 && selection.height > 0 )
- track_object = -1;
- break;
- }
- }
- //unused
- CvScalar hsv2rgb( float hue )
- {
- int rgb[3], p, sector;
- static const int sector_data[][3]=
- {{0,2,1}, {1,2,0}, {1,0,2}, {2,0,1}, {2,1,0}, {0,1,2}};
- hue *= 0.033333333333333333333333333333333f;
- sector = cvFloor(hue);
- p = cvRound(255*(hue - sector));
- p ^= sector & 1 ? 255 : 0;
- rgb[sector_data[sector][0]] = 255;
- rgb[sector_data[sector][1]] = 0;
- rgb[sector_data[sector][2]] = p;
- return cvScalar(rgb[2], rgb[1], rgb[0],0);
- }
- */
- #ifdef _EiC
- main(1,"camshiftdemo.c");
- #endif
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