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comparison c/Motion.cpp @ 136:0f790de9437e

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renamed Feature to Motion files and added code to test blob db
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Thu, 18 Aug 2011 22:25:21 -0400
parents c/Feature.cpp@32d2722d4028
children 445e773c9be3
comparison
equal deleted inserted replaced
135:32d2722d4028 136:0f790de9437e
1 #include "Motion.hpp"
2
3 #include "opencv2/core/core.hpp"
4 #include "opencv2/highgui/highgui.hpp"
5
6 #include "src/TrajectoryDBAccessList.h"
7
8 using namespace std;
9 using namespace cv;
10
11 FeatureTrajectory::FeatureTrajectory(const int& frameNum, const cv::Point2f& p) {
12 addPoint(frameNum, p);
13 }
14
15 bool FeatureTrajectory::largeDisplacement(const unsigned int& nDisplacements, const float& minTotalFeatureDisplacement) const {
16 bool result = true;
17 unsigned int nPositions = positions.size();
18 if (nPositions > nDisplacements) {
19 float disp = 0;
20 for (int i=0; i<nDisplacements; i++)
21 disp += displacementDistances[nPositions-2-i];
22 result = disp > minTotalFeatureDisplacement;
23 }
24 return result;
25 }
26
27 void FeatureTrajectory::addPoint(const int& frameNum, const Point2f& p) {
28 positions.add(frameNum, p);
29 computeMotionData(frameNum);
30 }
31
32 void FeatureTrajectory::write(TrajectoryDBAccess<Point2f>& trajectoryDB) const {
33 /// \todo save velocities
34 trajectoryDB.write(positions);
35 }
36
37 #ifdef USE_OPENCV
38 /// \todo add option for anti-aliased drawing, thickness
39 void FeatureTrajectory::draw(Mat& img, const Scalar& color) const {
40 Point2f p1 = positions[0];
41 for (unsigned int i=1; i<positions.size(); i++) {
42 Point2f p2 = positions[i];
43 line(img, p1, p2, color, 1);
44 p1 = p2;
45 }
46 }
47 #endif
48
49 // protected
50
51 void FeatureTrajectory::computeMotionData(const int& frameNum) {
52 unsigned int nPositions = positions.size();
53 if (nPositions >= 3) {
54 Point2f displacement = positions[nPositions-1] - positions[nPositions-2];
55 if (nPositions == 2) // duplicate first displacement so that positions and velocities have the same length
56 velocities.add(frameNum-1, displacement);
57 velocities.add(frameNum, displacement);
58 float dist = norm(displacement);
59 displacementDistances.push_back(dist);
60 }
61 }