详细描述
class GeodesicMetric
The Geodesic distance (Great circle distance) computes the shortest path between two data points on a sphere (the radius is set to one for the evaluation).
![\[\displaystyle d(\bf{x},\bf{x'}) = arccos\sum_{i=1}^{n} \frac{\bf{x_{i}}\cdot\bf{x'_{i}}} {\sqrt{x_{i}x_{i} x'_{i}x'_{i}}} \]](form_54.png)
在文件GeodesicMetric.h第35行定义。
继承图，类CGeodesicMetric
公有成员 | |
| CGeodesicMetric () | |
| CGeodesicMetric (CSimpleFeatures< float64_t > *l, CSimpleFeatures< float64_t > *r) | |
| virtual | ~CGeodesicMetric () |
| virtual bool | init (CFeatures *l, CFeatures *r) |
| virtual void | cleanup () |
| virtual EDistanceType | get_distance_type () |
| virtual const char * | get_name () const |
保护成员 | |
| virtual float64_t | compute (int32_t idx_a, int32_t idx_b) |
构造及析构函数文档
| CGeodesicMetric | ( | ) |
default constructor
在文件GeodesicMetric.cpp第20行定义。
| CGeodesicMetric | ( | CSimpleFeatures< float64_t > * | l, | |
| CSimpleFeatures< float64_t > * | r | |||
| ) |
constructor
- 参数:
-
l features of left-hand side r features of right-hand side
在文件GeodesicMetric.cpp第25行定义。
| ~CGeodesicMetric | ( | ) | [virtual] |
在文件GeodesicMetric.cpp第31行定义。
成员函数文档
| void cleanup | ( | ) | [virtual] |
| float64_t compute | ( | int32_t | idx_a, | |
| int32_t | idx_b | |||
| ) | [protected, virtual] |
compute distance for features a and b idx_{a,b} denote the index of the feature vectors in the corresponding feature object
实现了CDistance。
在文件GeodesicMetric.cpp第47行定义。
| virtual EDistanceType get_distance_type | ( | ) | [virtual] |
| virtual const char* get_name | ( | ) | const [virtual] |
init distance
- 参数:
-
l features of left-hand side r features of right-hand side
- 返回:
- if init was successful
重载CSimpleDistance< float64_t >。
在文件GeodesicMetric.cpp第36行定义。
该类的文档由以下文件生成：