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submodule
opencv
Commits
7f3273c7
Commit
7f3273c7
authored
Aug 22, 2013
by
Mathieu Barnachon
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Adding an export for HOGDetector compatibility.
An SVM train with HOG could export a single vector for HOGDetector.
parent
4ed9b1ca
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34 additions
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+34
-0
ml.hpp
modules/ml/include/opencv2/ml.hpp
+3
-0
svm.cpp
modules/ml/src/svm.cpp
+31
-0
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modules/ml/include/opencv2/ml.hpp
View file @
7f3273c7
...
...
@@ -518,6 +518,9 @@ public:
virtual
CvSVMParams
get_params
()
const
{
return
params
;
};
CV_WRAP
virtual
void
clear
();
// return a single vector for HOG detector.
virtual
void
get_svm_detector
(
std
::
vector
<
float
>
&
detector
)
const
;
static
CvParamGrid
get_default_grid
(
int
param_id
);
virtual
void
write
(
CvFileStorage
*
storage
,
const
char
*
name
)
const
;
...
...
modules/ml/src/svm.cpp
View file @
7f3273c7
...
...
@@ -1245,6 +1245,37 @@ const float* CvSVM::get_support_vector(int i) const
return
sv
&&
(
unsigned
)
i
<
(
unsigned
)
sv_total
?
sv
[
i
]
:
0
;
}
void
CvSVM
::
get_svm_detector
(
std
::
vector
<
float
>
&
detector
)
const
{
CV_Assert
(
var_all
>
0
&&
sv_total
>
0
&&
sv
!=
0
&&
decision_func
!=
0
&&
decision_func
->
alpha
!=
0
&&
decision_func
->
sv_count
==
sv_total
);
float
svi
=
0.
f
;
detector
.
clear
();
//clear stuff in vector.
detector
.
reserve
(
var_all
+
1
);
//reserve place for memory efficiency.
/**
* detector^i = \sum_j support_vector_j^i * \alpha_j
* detector^dim = -\rho
*/
for
(
int
i
=
0
;
i
<
var_all
;
++
i
)
{
svi
=
0.
f
;
for
(
int
j
=
0
;
j
<
sv_total
;
++
j
)
{
if
(
decision_func
->
sv_index
!=
NULL
)
// sometime the sv_index isn't store on YML/XML.
svi
+=
(
float
)(
sv
[
decision_func
->
sv_index
[
j
]][
i
]
*
decision_func
->
alpha
[
j
]
);
else
svi
+=
(
float
)(
sv
[
j
][
i
]
*
decision_func
->
alpha
[
j
]
);
}
detector
.
push_back
(
svi
);
}
detector
.
push_back
(
-
decision_func
->
rho
);
}
bool
CvSVM
::
set_params
(
const
CvSVMParams
&
_params
)
{
...
...
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