java.lang.Object
- org.opencv.core.Algorithm

Direct Known Subclasses:

AdaptiveManifoldFilter, AlignExposures, ArucoDetector, BackgroundSubtractor, BaseCascadeClassifier, BIF, CalibrateCRF, CharucoDetector, CLAHE, ContourFitting, DenseOpticalFlow, DescriptorMatcher, DisparityFilter, DTFilter, EdgeBoxes, EdgeDrawing, ERFilter, Facemark, FaceRecognizer, FastBilateralSolverFilter, FastGlobalSmootherFilter, FastLineDetector, Feature2D, GeneralizedHough, GraphSegmentation, GuidedFilter, ImgHashBase, Layer, legacy_MultiTracker, legacy_Tracker, LineSegmentDetector, MACE, MergeExposures, PCTSignatures, PCTSignaturesSQFD, PhaseUnwrapping, Plot2d, Retina, RetinaFastToneMapping, RFFeatureGetter, RidgeDetectionFilter, ScanSegment, SelectiveSearchSegmentation, SelectiveSearchSegmentationStrategy, SparseMatchInterpolator, SparseOpticalFlow, StatModel, StereoMatcher, StructuredEdgeDetection, StructuredLightPattern, SuperpixelLSC, SuperpixelSEEDS, SuperpixelSLIC, SyntheticSequenceGenerator, Tonemap, TransientAreasSegmentationModule, WhiteBalancer
```
public class Algorithm
extends java.lang.Object
```
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.). Here is example of SimpleBlobDetector use in your application via Algorithm interface: SNIPPET: snippets/core_various.cpp Algorithm

Field Summary

Fields
Modifier and Type Field Description

protected long nativeObj

Constructor Summary

Constructors
Modifier Constructor Description

protected Algorithm(long addr)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static Algorithm`	`__fromPtr__(long addr)`
`void`	`clear()`	Clears the algorithm state
`boolean`	`empty()`	Returns true if the Algorithm is empty (e.g.
`protected void`	`finalize()`
`java.lang.String`	`getDefaultName()`	Returns the algorithm string identifier.
`long`	`getNativeObjAddr()`
`void`	`save(java.lang.String filename)`	Saves the algorithm to a file.

Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - nativeObj
```
protected final long nativeObj
```
- Constructor Detail
  - Algorithm
```
protected Algorithm(long addr)
```
- Method Detail
  - getNativeObjAddr
```
public long getNativeObjAddr()
```
  - __fromPtr__
```
public static Algorithm __fromPtr__(long addr)
```
  - clear
```
public void clear()
```
    Clears the algorithm state
  - empty
```
public boolean empty()
```
    Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read
    
    Returns:
    
    automatically generated
  - save
```
public void save(java.lang.String filename)
```
    Saves the algorithm to a file. In order to make this method work, the derived class must implement Algorithm::write(FileStorage& fs).
    
    Parameters:
    
    filename - automatically generated
  - getDefaultName
```
public java.lang.String getDefaultName()
```
    Returns the algorithm string identifier. This string is used as top level xml/yml node tag when the object is saved to a file or string.
    
    Returns:
    
    automatically generated
  - finalize
```
protected void finalize()
                 throws java.lang.Throwable
```
    Overrides:
    
    finalize in class java.lang.Object
    
    Throws:
    
    java.lang.Throwable

Class Algorithm

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

nativeObj

Constructor Detail

Algorithm

Method Detail

getNativeObjAddr

__fromPtr__

clear

empty

save

getDefaultName

finalize

fromPtr