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annotate c/cvutils.cpp @ 127:d19d6e63dd77

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simple feature tracking and drawing working
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Wed, 17 Aug 2011 01:25:13 -0400
parents 336926453b28
children 536510f60854
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1 #include "cvutils.hpp"
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3 //#include "opencv/cv.h"
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4 #include "opencv2/highgui/highgui.hpp"
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5 #include "opencv2/features2d/features2d.hpp"
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7 #include <iostream>
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8 #include <vector>
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10 using namespace std;
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11 using namespace cv;
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13 void keyPoints2Points(const vector<KeyPoint>& kpts, vector<Point2f>& pts) {
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14 pts.clear();
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15 pts.reserve(kpts.size());
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17 for (unsigned int i=0; i<kpts.size(); i++)
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18 pts.push_back(kpts[i].pt);
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19 }
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21 IplImage* allocateImage(const int& width, const int& height, const int& depth, const int& channels) { return ::allocateImage(cvSize(width, height), depth, channels);}
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23 IplImage* allocateImage(const CvSize& size, const int& depth, const int& channels) {
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24 IplImage* image = cvCreateImage(size, depth, channels);
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26 if (!image) {
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27 cerr << "Error: Couldn't allocate image. Out of memory?\n" << endl;
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28 exit(-1);
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29 }
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31 return image;
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32 }
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34 int goToFrameNum(CvCapture* inputVideo, const int& currentFrameNum, const int& targetFrameNum) {
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35 int frameNum = currentFrameNum;
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36 if (currentFrameNum > targetFrameNum) {
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37 cerr << "Current frame number " << currentFrameNum << " is after the target frame number " << targetFrameNum << "." << endl;
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38 } else if (currentFrameNum < targetFrameNum) {
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39 IplImage* frame = cvQueryFrame(inputVideo);
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40 frameNum++;
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41 while (frame && frameNum<targetFrameNum) {
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42 frame = cvQueryFrame(inputVideo);
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43 frameNum++;
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44 }
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45 }
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47 return frameNum;
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48 }