SHOGUN
v1.1.0
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The Chi2 kernel operating on realvalued vectors computes the chi-squared distance between sets of histograms.
It is a very useful distance in image recognition (used to detect objects).
It is defined as
Definition at line 32 of file Chi2Kernel.h.
Public Member Functions | |
CChi2Kernel () | |
CChi2Kernel (int32_t size, float64_t width) | |
CChi2Kernel (CSimpleFeatures< float64_t > *l, CSimpleFeatures< float64_t > *r, float64_t width, int32_t size) | |
virtual | ~CChi2Kernel () |
virtual bool | init (CFeatures *l, CFeatures *r) |
virtual EKernelType | get_kernel_type () |
virtual EFeatureClass | get_feature_class () |
virtual EFeatureType | get_feature_type () |
virtual const char * | get_name () const |
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CDotKernel () | |
CDotKernel (int32_t cachesize) | |
CDotKernel (CFeatures *l, CFeatures *r) | |
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CKernel () | |
CKernel (int32_t size) | |
CKernel (CFeatures *l, CFeatures *r, int32_t size) | |
virtual | ~CKernel () |
float64_t | kernel (int32_t idx_a, int32_t idx_b) |
SGMatrix< float64_t > | get_kernel_matrix () |
virtual SGVector< float64_t > | get_kernel_col (int32_t j) |
virtual SGVector< float64_t > | get_kernel_row (int32_t i) |
template<class T > | |
SGMatrix< T > | get_kernel_matrix () |
virtual bool | set_normalizer (CKernelNormalizer *normalizer) |
virtual CKernelNormalizer * | get_normalizer () |
virtual bool | init_normalizer () |
virtual void | cleanup () |
void | load (CFile *loader) |
void | save (CFile *writer) |
CFeatures * | get_lhs () |
CFeatures * | get_rhs () |
virtual int32_t | get_num_vec_lhs () |
virtual int32_t | get_num_vec_rhs () |
virtual bool | has_features () |
bool | get_lhs_equals_rhs () |
virtual void | remove_lhs_and_rhs () |
virtual void | remove_lhs () |
virtual void | remove_rhs () |
takes all necessary steps if the rhs is removed from kernel | |
void | set_cache_size (int32_t size) |
int32_t | get_cache_size () |
void | list_kernel () |
bool | has_property (EKernelProperty p) |
virtual void | clear_normal () |
virtual void | add_to_normal (int32_t vector_idx, float64_t weight) |
EOptimizationType | get_optimization_type () |
virtual void | set_optimization_type (EOptimizationType t) |
bool | get_is_initialized () |
virtual bool | init_optimization (int32_t count, int32_t *IDX, float64_t *weights) |
virtual bool | delete_optimization () |
bool | init_optimization_svm (CSVM *svm) |
virtual float64_t | compute_optimized (int32_t vector_idx) |
virtual void | compute_batch (int32_t num_vec, int32_t *vec_idx, float64_t *target, int32_t num_suppvec, int32_t *IDX, float64_t *alphas, float64_t factor=1.0) |
float64_t | get_combined_kernel_weight () |
void | set_combined_kernel_weight (float64_t nw) |
virtual int32_t | get_num_subkernels () |
virtual void | compute_by_subkernel (int32_t vector_idx, float64_t *subkernel_contrib) |
virtual const float64_t * | get_subkernel_weights (int32_t &num_weights) |
virtual void | set_subkernel_weights (SGVector< float64_t > weights) |
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CSGObject () | |
CSGObject (const CSGObject &orig) | |
virtual | ~CSGObject () |
virtual bool | is_generic (EPrimitiveType *generic) const |
template<class T > | |
void | set_generic () |
void | unset_generic () |
virtual void | print_serializable (const char *prefix="") |
virtual bool | save_serializable (CSerializableFile *file, const char *prefix="") |
virtual bool | load_serializable (CSerializableFile *file, const char *prefix="") |
void | set_global_io (SGIO *io) |
SGIO * | get_global_io () |
void | set_global_parallel (Parallel *parallel) |
Parallel * | get_global_parallel () |
void | set_global_version (Version *version) |
Version * | get_global_version () |
SGVector< char * > | get_modelsel_names () |
char * | get_modsel_param_descr (const char *param_name) |
index_t | get_modsel_param_index (const char *param_name) |
Protected Member Functions | |
virtual float64_t | compute (int32_t idx_a, int32_t idx_b) |
Protected Attributes | |
float64_t | width |
Additional Inherited Members | |
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SGIO * | io |
Parallel * | parallel |
Version * | version |
Parameter * | m_parameters |
Parameter * | m_model_selection_parameters |
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template<class T > | |
static void * | get_kernel_matrix_helper (void *p) |
CChi2Kernel | ( | ) |
default constructor
Definition at line 25 of file Chi2Kernel.cpp.
CChi2Kernel | ( | int32_t | size, |
float64_t | width | ||
) |
CChi2Kernel | ( | CSimpleFeatures< float64_t > * | l, |
CSimpleFeatures< float64_t > * | r, | ||
float64_t | width, | ||
int32_t | size | ||
) |
constructor
l | features of left-hand side |
r | features of right-hand side |
width | width |
size | cache size |
Definition at line 37 of file Chi2Kernel.cpp.
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virtual |
Definition at line 45 of file Chi2Kernel.cpp.
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protectedvirtual |
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 |
Reimplemented from CDotKernel.
Definition at line 57 of file Chi2Kernel.cpp.
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virtual |
return feature class the kernel can deal with
Reimplemented from CDotKernel.
Definition at line 77 of file Chi2Kernel.h.
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virtual |
return feature type the kernel can deal with
Reimplemented from CDotKernel.
Definition at line 83 of file Chi2Kernel.h.
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virtual |
return what type of kernel we are
Implements CDotKernel.
Definition at line 71 of file Chi2Kernel.h.
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virtual |
return the kernel's name
Reimplemented from CDotKernel.
Definition at line 89 of file Chi2Kernel.h.
initialize kernel
l | features of left-hand side |
r | features of right-hand side |
Reimplemented from CDotKernel.
Definition at line 50 of file Chi2Kernel.cpp.
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protected |
width
Definition at line 104 of file Chi2Kernel.h.