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submodule
opencv
Commits
b8ea21b2
Commit
b8ea21b2
authored
Oct 04, 2013
by
Rahul Kavi
Committed by
Maksim Shabunin
Aug 18, 2014
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updated logistic regression sample program
parent
6c74439d
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50 additions
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13 deletions
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-13
logistic_regression.cpp
samples/cpp/logistic_regression.cpp
+50
-13
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samples/cpp/
sample_
logistic_regression.cpp
→
samples/cpp/logistic_regression.cpp
View file @
b8ea21b2
///////////////////////////////////////////////////////////////////////////////////////
// sample_logistic_regression.cpp
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
// This is a
sample program demostrating classification of digits 0 and 1 using Logistic Regression
// This is a
implementation of the Logistic Regression algorithm in C++ in OpenCV.
// AUTHOR:
// Rahul Kavi rahulkavi[at]live[at]com
//
// contains a subset of data from the popular Iris Dataset (taken from "http://archive.ics.uci.edu/ml/datasets/Iris")
// # You are free to use, change, or redistribute the code in any way you wish for
// # non-commercial purposes, but please maintain the name of the original author.
// # This code comes with no warranty of any kind.
// #
// # You are free to use, change, or redistribute the code in any way you wish for
// # non-commercial purposes, but please maintain the name of the original author.
// # This code comes with no warranty of any kind.
// # Logistic Regression ALGORITHM
// License Agreement
// For Open Source Computer Vision Library
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2008-2011, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
#include <iostream>
#include <opencv2/core/core.hpp>
...
...
@@ -76,17 +120,11 @@ int main()
cout
<<
"initializing Logisitc Regression Parameters
\n
"
<<
endl
;
CvLR_TrainParams
params
=
CvLR_TrainParams
();
params
.
alpha
=
0.001
;
params
.
num_iters
=
10
;
params
.
norm
=
CvLR
::
REG_L2
;
params
.
regularized
=
1
;
params
.
train_method
=
CvLR
::
BATCH
;
LogisticRegressionParams
params
=
LogisticRegressionParams
(
0.001
,
10
,
LogisticRegression
::
REG_L2
,
1
,
LogisticRegression
::
BATCH
,
1
);
cout
<<
"training Logisitc Regression classifier
\n
"
<<
endl
;
CvLR
lr_
(
data_train
,
labels_train
,
params
);
LogisticRegression
lr_
(
data_train
,
labels_train
,
params
);
lr_
.
predict
(
data_test
,
responses
);
labels_test
.
convertTo
(
labels_test
,
CV_32S
);
...
...
@@ -106,7 +144,7 @@ int main()
lr_
.
save
(
"NewLR_Trained.xml"
);
// load the classifier onto new object
CvLR
lr2
;
LogisticRegression
lr2
;
cout
<<
"loading a new classifier"
<<
endl
;
lr2
.
load
(
"NewLR_Trained.xml"
);
...
...
@@ -119,8 +157,7 @@ int main()
lr2
.
predict
(
data_test
,
responses2
);
// calculate accuracy
result
=
(
labels_test
==
responses2
)
/
255
;
cout
<<
"accuracy using loaded classifier: "
<<
((
double
)
cv
::
sum
(
result
)[
0
]
/
result
.
rows
)
*
100
<<
"%
\n
"
;
cout
<<
"accuracy using loaded classifier: "
<<
100
*
(
float
)
cv
::
countNonZero
(
labels_test
==
responses2
)
/
responses2
.
rows
<<
"%"
<<
endl
;
waitKey
(
0
);
return
0
;
...
...
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