org.opencv.core
public class Algorithm extends java.lang.Object
class CV_EXPORTS_W Algorithm
// C++ code:
public:
Algorithm();
virtual ~Algorithm();
string name() const;
template typename ParamType<_Tp>.member_type get(const string&
name) const;
template typename ParamType<_Tp>.member_type get(const char*
name) const;
CV_WRAP int getInt(const string& name) const;
CV_WRAP double getDouble(const string& name) const;
CV_WRAP bool getBool(const string& name) const;
CV_WRAP string getString(const string& name) const;
CV_WRAP Mat getMat(const string& name) const;
CV_WRAP vector getMatVector(const string& name) const;
CV_WRAP Ptr getAlgorithm(const string& name) const;
void set(const string& name, int value);
void set(const string& name, double value);
void set(const string& name, bool value);
void set(const string& name, const string& value);
void set(const string& name, const Mat& value);
void set(const string& name, const vector& value);
void set(const string& name, const Ptr& value);
template void set(const string& name, const Ptr<_Tp>& value);
CV_WRAP void setInt(const string& name, int value);
CV_WRAP void setDouble(const string& name, double value);
CV_WRAP void setBool(const string& name, bool value);
CV_WRAP void setString(const string& name, const string& value);
CV_WRAP void setMat(const string& name, const Mat& value);
CV_WRAP void setMatVector(const string& name, const vector& value);
CV_WRAP void setAlgorithm(const string& name, const Ptr& value);
template void setAlgorithm(const string& name, const Ptr<_Tp>&
value);
void set(const char* name, int value);
void set(const char* name, double value);
void set(const char* name, bool value);
void set(const char* name, const string& value);
void set(const char* name, const Mat& value);
void set(const char* name, const vector& value);
void set(const char* name, const Ptr& value);
template void set(const char* name, const Ptr<_Tp>& value);
void setInt(const char* name, int value);
void setDouble(const char* name, double value);
void setBool(const char* name, bool value);
void setString(const char* name, const string& value);
void setMat(const char* name, const Mat& value);
void setMatVector(const char* name, const vector& value);
void setAlgorithm(const char* name, const Ptr& value);
template void setAlgorithm(const char* name, const Ptr<_Tp>&
value);
CV_WRAP string paramHelp(const string& name) const;
int paramType(const char* name) const;
CV_WRAP int paramType(const string& name) const;
CV_WRAP void getParams(CV_OUT vector& names) const;
virtual void write(FileStorage& fs) const;
virtual void read(const FileNode& fn);
typedef Algorithm* (*Constructor)(void);
typedef int (Algorithm.*Getter)() const;
typedef void (Algorithm.*Setter)(int);
CV_WRAP static void getList(CV_OUT vector& algorithms);
CV_WRAP static Ptr _create(const string& name);
template static Ptr<_Tp> create(const string& name);
virtual AlgorithmInfo* info() const / * TODO: make it = 0;* / { return 0; }
};
This is a base class for all more or less complex algorithms in OpenCV,
especially for classes of algorithms, for which there can be multiple
implementations. The examples are stereo correspondence (for which there are
algorithms like block matching, semi-global block matching, graph-cut etc.),
background subtraction (which can be done using mixture-of-gaussians models,
codebook-based algorithm etc.), optical flow (block matching, Lucas-Kanade,
Horn-Schunck etc.).
The class provides the following features for all derived classes:
Algorithm.create
). If you plan to add your own algorithms, it
is good practice to add a unique prefix to your algorithms to distinguish
them from other algorithms.
cvSetCaptureProperty()
, cvGetCaptureProperty()
,
VideoCapture.set()
and VideoCapture.get()
.
Algorithm
provides similar method where instead of integer id's
you specify the parameter names as text strings. See Algorithm.set
and Algorithm.get
for details.
Here is example of SIFT use in your application via Algorithm interface:
// C++ code:
#include "opencv2/opencv.hpp"
#include "opencv2/nonfree/nonfree.hpp"...
initModule_nonfree(); // to load SURF/SIFT etc.
Ptr sift = Algorithm.create("Feature2D.SIFT");
FileStorage fs("sift_params.xml", FileStorage.READ);
if(fs.isOpened()) // if we have file with parameters, read them
sift->read(fs["sift_params"]);
fs.release();
else // else modify the parameters and store them; user can later edit the
file to use different parameters
sift->set("contrastThreshold", 0.01f); // lower the contrast threshold,
compared to the default value
WriteStructContext ws(fs, "sift_params", CV_NODE_MAP);
sift->write(fs);
Mat image = imread("myimage.png", 0), descriptors;
vector keypoints;
(*sift)(image, noArray(), keypoints, descriptors);
- See Also:
- org.opencv.core.Algorithm
-
-
Method Summary
Methods
Modifier and Type
Method and Description
boolean
getBool(java.lang.String name)
double
getDouble(java.lang.String name)
int
getInt(java.lang.String name)
Mat
getMat(java.lang.String name)
java.util.List<Mat>
getMatVector(java.lang.String name)
java.lang.String
getString(java.lang.String name)
java.lang.String
paramHelp(java.lang.String name)
int
paramType(java.lang.String name)
void
setBool(java.lang.String name,
boolean value)
void
setDouble(java.lang.String name,
double value)
void
setInt(java.lang.String name,
int value)
void
setMat(java.lang.String name,
Mat value)
void
setMatVector(java.lang.String name,
java.util.List<Mat> value)
void
setString(java.lang.String name,
java.lang.String value)
-
-
Method Detail
-
getBool
public boolean getBool(java.lang.String name)
-
getDouble
public double getDouble(java.lang.String name)
-
getInt
public int getInt(java.lang.String name)
-
getMat
public Mat getMat(java.lang.String name)
-
getMatVector
public java.util.List<Mat> getMatVector(java.lang.String name)
-
getString
public java.lang.String getString(java.lang.String name)
-
paramHelp
public java.lang.String paramHelp(java.lang.String name)
-
paramType
public int paramType(java.lang.String name)
-
setBool
public void setBool(java.lang.String name,
boolean value)
-
setDouble
public void setDouble(java.lang.String name,
double value)
-
setInt
public void setInt(java.lang.String name,
int value)
-
setMat
public void setMat(java.lang.String name,
Mat value)
-
setMatVector
public void setMatVector(java.lang.String name,
java.util.List<Mat> value)
-
setString
public void setString(java.lang.String name,
java.lang.String value)