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annotate c/cvutils.cpp @ 131:3a11dba30655

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added colors
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Wed, 17 Aug 2011 19:03:11 -0400
parents 536510f60854
children b32947b002da
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1 #include "cvutils.hpp"
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2
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3 #include "opencv2/core/core.hpp"
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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, const bool& clearPts /* = true */) {
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14 if (clearPts)
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15 pts.clear();
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16 pts.reserve(kpts.size());
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18 for (unsigned int i=0; i<kpts.size(); i++)
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19 pts.push_back(kpts[i].pt);
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20 }
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22 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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24 IplImage* allocateImage(const CvSize& size, const int& depth, const int& channels) {
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25 IplImage* image = cvCreateImage(size, depth, channels);
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27 if (!image) {
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28 cerr << "Error: Couldn't allocate image. Out of memory?\n" << endl;
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29 exit(-1);
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30 }
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32 return image;
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33 }
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35 int goToFrameNum(CvCapture* inputVideo, const int& currentFrameNum, const int& targetFrameNum) {
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36 int frameNum = currentFrameNum;
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37 if (currentFrameNum > targetFrameNum) {
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38 cerr << "Current frame number " << currentFrameNum << " is after the target frame number " << targetFrameNum << "." << endl;
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39 } else if (currentFrameNum < targetFrameNum) {
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40 IplImage* frame = cvQueryFrame(inputVideo);
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41 frameNum++;
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42 while (frame && frameNum<targetFrameNum) {
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43 frame = cvQueryFrame(inputVideo);
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44 frameNum++;
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45 }
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46 }
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48 return frameNum;
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49 }
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51 const Scalar Colors::color[] = {Colors::red(),
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52 Colors::green(),
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53 Colors::blue(),
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54 Colors::cyan(),
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55 Colors::magenta(),
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56 Colors::yellow(),
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57 Colors::white(),
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58 Colors::black()};
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60 Scalar Colors::black(void) { return Scalar(0,0,0);}
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61 Scalar Colors::red(void) { return Scalar(255,0,0);}
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62 Scalar Colors::green(void) { return Scalar(0,255,0);}
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63 Scalar Colors::blue(void) { return Scalar(0,0,255);}
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64 Scalar Colors::white(void) { return Scalar(255,255,255);}
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65 Scalar Colors::magenta(void) { return Scalar(255,0,255);}
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66 Scalar Colors::cyan(void) { return Scalar(0,255,255);}
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67 Scalar Colors::yellow(void) { return Scalar(255,255,0);}
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69 Scalar Colors::color3(const int& num) { return Colors::color[num%3];}
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70 Scalar Colors::color8(const int& num) { return Colors::color[num%Colors::nColors];}