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annotate c/cvutils.cpp @ 144:b32947b002da

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added the code to read matrices from text files
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Fri, 26 Aug 2011 19:38:11 -0400
parents 3a11dba30655
children 0089fb29cd26
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1 #include "cvutils.hpp"
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2 #include "utils.hpp"
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4 #include "opencv2/core/core.hpp"
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5 #include "opencv2/highgui/highgui.hpp"
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6 #include "opencv2/features2d/features2d.hpp"
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8 #include <iostream>
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9 #include <vector>
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11 using namespace std;
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12 using namespace cv;
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13
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14 cv::Mat loadMat(const string& filename, const string& separator) {
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15 vector<vector<float> > numbers = ::loadNumbers(filename, separator);
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17 Mat mat;
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19 if (!numbers.empty()) {
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20 mat = Mat(numbers.size(),numbers[0].size(), CV_32FC1);
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21 for (unsigned int i=0; i<numbers.size(); i++)
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22 for (unsigned int j=0; j<numbers[0].size(); j++)
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23 mat.at<float>(i,j) = numbers[i][j];
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24 }
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26 return mat;
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27 }
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29 void keyPoints2Points(const vector<KeyPoint>& kpts, vector<Point2f>& pts, const bool& clearPts /* = true */) {
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30 if (clearPts)
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31 pts.clear();
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32 pts.reserve(kpts.size());
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34 for (unsigned int i=0; i<kpts.size(); i++)
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35 pts.push_back(kpts[i].pt);
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36 }
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38 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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40 IplImage* allocateImage(const CvSize& size, const int& depth, const int& channels) {
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41 IplImage* image = cvCreateImage(size, depth, channels);
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43 if (!image) {
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44 cerr << "Error: Couldn't allocate image. Out of memory?\n" << endl;
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45 exit(-1);
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46 }
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48 return image;
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49 }
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51 int goToFrameNum(CvCapture* inputVideo, const int& currentFrameNum, const int& targetFrameNum) {
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52 int frameNum = currentFrameNum;
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53 if (currentFrameNum > targetFrameNum) {
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54 cerr << "Current frame number " << currentFrameNum << " is after the target frame number " << targetFrameNum << "." << endl;
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55 } else if (currentFrameNum < targetFrameNum) {
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56 IplImage* frame = cvQueryFrame(inputVideo);
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57 frameNum++;
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58 while (frame && frameNum<targetFrameNum) {
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59 frame = cvQueryFrame(inputVideo);
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60 frameNum++;
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61 }
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62 }
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64 return frameNum;
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65 }
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67 const Scalar Colors::color[] = {Colors::red(),
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68 Colors::green(),
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69 Colors::blue(),
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70 Colors::cyan(),
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71 Colors::magenta(),
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72 Colors::yellow(),
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73 Colors::white(),
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74 Colors::black()};
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76 Scalar Colors::black(void) { return Scalar(0,0,0);}
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77 Scalar Colors::red(void) { return Scalar(255,0,0);}
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78 Scalar Colors::green(void) { return Scalar(0,255,0);}
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79 Scalar Colors::blue(void) { return Scalar(0,0,255);}
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80 Scalar Colors::white(void) { return Scalar(255,255,255);}
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81 Scalar Colors::magenta(void) { return Scalar(255,0,255);}
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82 Scalar Colors::cyan(void) { return Scalar(0,255,255);}
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83 Scalar Colors::yellow(void) { return Scalar(255,255,0);}
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85 Scalar Colors::color3(const int& num) { return Colors::color[num%3];}
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86 Scalar Colors::color8(const int& num) { return Colors::color[num%Colors::nColors];}