Spherical kernel.
Formally described as
![\[ k(x, y) = 1 - \frac{3}{2} \frac{|x-y|}{\sigma} + \frac{1}{2} \left( \frac{|x-y|}{\sigma} \right)^3 \mbox{if}~ |x-y| \leq \sigma \mbox{, zero otherwise} \]](form_162.png)
Definition at line 38 of file SphericalKernel.h.
Public Member Functions | |
| CSphericalKernel () | |
| CSphericalKernel (int32_t size, float64_t sigma, CDistance *dist) | |
| CSphericalKernel (CFeatures *l, CFeatures *r, float64_t sigma, CDistance *dist) | |
| virtual bool | init (CFeatures *l, CFeatures *r) |
| void | init () |
| virtual EKernelType | get_kernel_type () |
| virtual EFeatureType | get_feature_type () |
| virtual EFeatureClass | get_feature_class () |
| virtual const char * | get_name () const |
| virtual void | set_sigma (float64_t s) |
| virtual float64_t | get_sigma () const |
| virtual | ~CSphericalKernel () |
Protected Member Functions | |
| virtual float64_t | compute (int32_t idx_a, int32_t idx_b) |
Protected Attributes | |
| CDistance * | distance |
| float64_t | sigma |
| CSphericalKernel | ( | ) |
default constructor
Definition at line 17 of file SphericalKernel.cpp.
| CSphericalKernel | ( | int32_t | size, | |
| float64_t | sigma, | |||
| CDistance * | dist | |||
| ) |
constructor
| size | cache size | |
| sigma | kernel parameter sigma | |
| dist | distance |
Definition at line 23 of file SphericalKernel.cpp.
| CSphericalKernel | ( | CFeatures * | l, | |
| CFeatures * | r, | |||
| float64_t | sigma, | |||
| CDistance * | dist | |||
| ) |
constructor
| l | features of left-side | |
| r | features of right-side | |
| sigma | kernel parameter sigma | |
| dist | distance |
Definition at line 32 of file SphericalKernel.cpp.
| ~CSphericalKernel | ( | ) | [virtual] |
Definition at line 43 of file SphericalKernel.cpp.
| float64_t compute | ( | int32_t | idx_a, | |
| int32_t | idx_b | |||
| ) | [protected, virtual] |
compute kernel function for features a and b idx_{a,b} denote the index of the feature vectors in the corresponding feature object
| idx_a | index a | |
| idx_b | index b |
Implements CKernel.
Definition at line 63 of file SphericalKernel.cpp.
| virtual EFeatureClass get_feature_class | ( | ) | [virtual] |
| virtual EFeatureType get_feature_type | ( | ) | [virtual] |
| virtual EKernelType get_kernel_type | ( | ) | [virtual] |
| virtual const char* get_name | ( | ) | const [virtual] |
| virtual float64_t get_sigma | ( | ) | const [virtual] |
| void init | ( | ) |
Do basic initialisations like default settings and registering parameters
Reimplemented from CKernel.
Definition at line 57 of file SphericalKernel.cpp.
initialize kernel with features
| l | features of left-side | |
| r | features of right-side |
Reimplemented from CKernel.
Definition at line 49 of file SphericalKernel.cpp.
| virtual void set_sigma | ( | float64_t | s | ) | [virtual] |
distance
Definition at line 113 of file SphericalKernel.h.
width
Definition at line 116 of file SphericalKernel.h.
