Mercurial Hosting > traffic-intelligence
comparison trajectorymanagement/src/MinimumMetric.h @ 1159:e1e7acef8eab
moved trajectory management library into Traffic Intelligence
author | Nicolas Saunier <nicolas.saunier@polymtl.ca> |
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date | Mon, 22 Feb 2021 22:09:35 -0500 |
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1158:7eb972942f22 | 1159:e1e7acef8eab |
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1 #ifndef MINIMUMMETRIC_H_ | |
2 #define MINIMUMMETRIC_H_ | |
3 | |
4 #include "Metric.h" | |
5 | |
6 #include "TrajectoryExceptions.h" | |
7 | |
8 /** | |
9 * MinimumMetric class. | |
10 * | |
11 * The Minimum metric measures the similarity between two trajectories. | |
12 * This class represents the smallest distance all 3 dimensions, for ALL points. | |
13 * | |
14 */ | |
15 template<typename Tr, typename To> | |
16 class MinimumMetric: public Metric<Tr, To> | |
17 { | |
18 public: | |
19 /** | |
20 * Compute similarity between two trajectories. | |
21 * | |
22 * @param[in] a input trajectory | |
23 * @param[in] b input trajectory | |
24 * @param[out] result distance between two trajectories | |
25 */ | |
26 void distance(const Trajectory<Tr> *a, const Trajectory<Tr> *b, To &result, unsigned int nbOfPoints = std::numeric_limits<unsigned int>::max()) | |
27 { | |
28 result = To(0); | |
29 | |
30 if (nbOfPoints == std::numeric_limits<unsigned int>::max()) | |
31 checkTrajectoryLength(a->size(), b->size()); | |
32 | |
33 To diff = abs((a->getPoint(0) - b->getPoint(0)).x);//est-ce que ça fait vraiment une différence de x ? | |
34 for (unsigned int i = 0; i < a->size() and i < nbOfPoints; ++i) | |
35 { | |
36 cv::Point3_<typeof(static_cast<Tr>(a->getPoint(i)).x)> p(a->getPoint(i) - b->getPoint(i)); | |
37 diff = std::min(diff, abs(p.x)); | |
38 diff = std::min(diff, abs(p.y)); | |
39 if (dim(a->getPoint(i)) == 3) | |
40 { | |
41 diff = std::min(diff, abs(p.z)); | |
42 } | |
43 } | |
44 | |
45 result = diff; | |
46 } | |
47 | |
48 private: | |
49 /** | |
50 * Check the length of the trajectories. | |
51 * | |
52 * @param[in] a the size of the trajectory | |
53 * @param[in] b the size of the trajectory | |
54 */ | |
55 void checkTrajectoryLength(size_t a, size_t b) const | |
56 { | |
57 if (a != b || a == 0) | |
58 { | |
59 throw TrajectoryLengthErrorException(); | |
60 } | |
61 } | |
62 }; | |
63 | |
64 #endif /* MINIMUMMETRIC_H_ */ |