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annotate c/optical-flow.cpp @ 398:3399bd48cb40

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Ajout d'une méthode pour obtenir le nombre de FPS Méthode de capture des trames vidéos plus résistante aux erreur Utilisation d'un dictionnaire pour les fichier de configuration afin de garder le nom des sections
author Jean-Philippe Jodoin <jpjodoin@gmail.com>
date Mon, 29 Jul 2013 13:46:07 -0400
parents bc4ea09b1743
children 8e30c9a6ac6f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #include "cvutils.hpp"
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2 #include "utils.hpp"
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3
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4 #include "opencv/cv.h"
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5 #include "opencv/highgui.h"
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6
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7 #include <iostream>
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8 #include <ctime>
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9
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10 /* MSVC does not have lrintf */
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11 #ifdef _MSC_VER
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12 static inline long lrintf(float f){
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13 /* x64 does not supported embedded assembly */
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14 #ifdef _M_X64
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15 return (long)((f>0.0f) ? (f + 0.5f):(f -0.5f));
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16 #else
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17 int i;
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18
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19 _asm{
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20 fld f
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21 fistp i
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22 };
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23
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24 return i;
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25 #endif
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26 }
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27 #endif
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28
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29 using namespace std;
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30
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31 void videoTiming(CvCapture* inputVideo) {
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32 IplImage* frame = cvQueryFrame(inputVideo);
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33 //IplImage* bwFrame = allocateImage(frame->width, frame->height, IPL_DEPTH_8U, 1);
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35 int frameNum = 0;
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36 time_t seconds;
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37 time_t t0 = time(NULL);
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38 while (frame) {
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39 frameNum = ::goToFrameNum(inputVideo, frameNum, frameNum+1000);
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40 seconds = time(NULL)-t0;
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41
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42 cout << frameNum << " " << seconds << endl;
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43 }
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44 }
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46 int main(int argc, char *argv[]) {
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47 //cout << "Hello World" << endl;
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48
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49 CvCapture *inputVideo = 0;
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50 if (argc == 1)
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51 inputVideo = cvCreateCameraCapture(-1);
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52 else
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53 inputVideo = cvCaptureFromFile(argv[1]);
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55 int frameNum = 0;
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56 cvNamedWindow("Optical Flow", CV_WINDOW_AUTOSIZE);
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57
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58 // allocate space for pyramids
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59 IplImage* frame = cvQueryFrame(inputVideo);
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60 CvSize frameSize = cvSize(frame->width, frame->height);
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61
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62 IplImage* frame1_1C = ::allocateImage(frameSize, IPL_DEPTH_8U, 1);
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63 cvConvertImage(frame, frame1_1C);
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64
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65 IplImage *frame1 = ::allocateImage(frameSize, IPL_DEPTH_8U, 3);
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66 cvConvertImage(frame, frame1);
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67
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68 frame = cvQueryFrame(inputVideo);
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70 IplImage* frame2_1C = ::allocateImage(frameSize, IPL_DEPTH_8U, 1);
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71 cvConvertImage(frame, frame2_1C);
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73 IplImage *eig_image = ::allocateImage(frameSize, IPL_DEPTH_32F, 1);
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74 IplImage *temp_image = ::allocateImage(frameSize, IPL_DEPTH_32F, 1);
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76 int nFeatures = 1000;
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77 CvPoint2D32f frame1_features[1000];
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79 CvPoint2D32f frame2_features[1000];
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81 char optical_flow_found_feature[1000];
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82 float optical_flow_feature_error[1000];
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83
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84 CvSize optical_flow_window = cvSize(3,3);
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85
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86 CvTermCriteria optical_flow_termination_criteria = cvTermCriteria( CV_TERMCRIT_ITER | CV_TERMCRIT_EPS, 20, .3 );
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87 IplImage* pyramid1 = ::allocateImage(frameSize, IPL_DEPTH_8U, 1);
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88 IplImage* pyramid2 = ::allocateImage(frameSize, IPL_DEPTH_8U, 1);
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89
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90 int pressedKey = '?';
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91 while (frame && !::interruptionKey(pressedKey)) {
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92 cvGoodFeaturesToTrack(frame1_1C, eig_image, temp_image, frame1_features, &nFeatures, 0.05 /*quality*/, 1/* min dist*/, NULL);
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93 cvCalcOpticalFlowPyrLK(frame1_1C, frame2_1C, pyramid1, pyramid2, frame1_features, frame2_features, nFeatures, optical_flow_window, 5, optical_flow_found_feature, optical_flow_feature_error, optical_flow_termination_criteria, 0 );
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94
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95 for(int i = 0; i < nFeatures; i++) {
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96 if (optical_flow_found_feature[i] != 0) {
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97 int line_thickness = 1;
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98 CvScalar line_color = CV_RGB(255,0,0);
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99
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100 CvPoint p,q;
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101 p.x = lrintf(frame1_features[i].x);
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102 p.y = lrintf(frame1_features[i].y);
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103 q.x = lrintf(frame2_features[i].x);
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104 q.y = lrintf(frame2_features[i].y);
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105
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106 double dx = frame2_features[i].x-frame1_features[i].x;
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107 double dy = frame2_features[i].y-frame1_features[i].y;
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108
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109 double angle = atan2( (double) p.y - q.y, (double) p.x - q.x );
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110 double dist = sqrt(square(dx) + square(dy));
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111
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112 if (dist > 2.) { // min motion distance
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113 q.x = lrintf(frame1_features[i].x+dx*3); //(p.x - 3 * hypotenuse * cos(angle));
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114 q.y = lrintf(frame1_features[i].y+dy*3); //(p.y - 3 * hypotenuse * sin(angle));
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115
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116 /* Now we draw the main line of the arrow. */
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117 cvLine( frame1, p, q, line_color, line_thickness, CV_AA, 0 );
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118 /* Now draw the tips of the arrow. I do some scaling so that the
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119 * tips look proportional to the main line of the arrow.
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120 */
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121 float arrowSize = 6;
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122 p.x = lrintf(q.x + arrowSize * cos(angle + pi / 4));
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123 p.y = lrintf(q.y + arrowSize * sin(angle + pi / 4));
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124 cvLine( frame1, p, q, line_color, line_thickness, CV_AA, 0 );
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125 p.x = lrintf(q.x + arrowSize * cos(angle - pi / 4));
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126 p.y = lrintf(q.y + arrowSize * sin(angle - pi / 4));
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127 cvLine( frame1, p, q, line_color, line_thickness, CV_AA, 0 );
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128 }
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129 }
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130 }
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131 cvShowImage("Optical Flow", frame1);
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132 pressedKey = cvWaitKey(5);
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133 frame = cvQueryFrame(inputVideo);
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134 frameNum++;
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135 cout << frameNum << endl;
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136
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137 cvCopy(frame2_1C, frame1_1C);
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138 cvCopy(pyramid2, pyramid1);
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139 cvConvertImage(frame, frame2_1C);
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140 cvConvertImage(frame, frame1);
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141 }
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142
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143 return 1;
068cf45c3f1b added optical flow skeleton (test to reach a frame with cvqueryframe (fast for small resolutions)
Nicolas Saunier <nico@confins.net>
parents:
diff changeset
144 }