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

```
public class RidgeDetectionFilter
extends Algorithm
```
Applies Ridge Detection Filter to an input image. Implements Ridge detection similar to the one in [Mathematica](http://reference.wolfram.com/language/ref/RidgeFilter.html) using the eigen values from the Hessian Matrix of the input image using Sobel Derivatives. Additional refinement can be done using Skeletonization and Binarization. Adapted from CITE: segleafvein and CITE: M_RF

Field Summary
- Fields inherited from class org.opencv.core.Algorithm
  nativeObj

Constructor Summary

Constructors
Modifier Constructor Description

protected RidgeDetectionFilter(long addr)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static RidgeDetectionFilter`	`__fromPtr__(long addr)`
`static RidgeDetectionFilter`	`create()`	Create pointer to the Ridge detection filter.
`static RidgeDetectionFilter`	`create(int ddepth)`	Create pointer to the Ridge detection filter.
`static RidgeDetectionFilter`	`create(int ddepth, int dx)`	Create pointer to the Ridge detection filter.
`static RidgeDetectionFilter`	`create(int ddepth, int dx, int dy)`	Create pointer to the Ridge detection filter.
`static RidgeDetectionFilter`	`create(int ddepth, int dx, int dy, int ksize)`	Create pointer to the Ridge detection filter.
`static RidgeDetectionFilter`	`create(int ddepth, int dx, int dy, int ksize, int out_dtype)`	Create pointer to the Ridge detection filter.
`static RidgeDetectionFilter`	`create(int ddepth, int dx, int dy, int ksize, int out_dtype, double scale)`	Create pointer to the Ridge detection filter.
`static RidgeDetectionFilter`	`create(int ddepth, int dx, int dy, int ksize, int out_dtype, double scale, double delta)`	Create pointer to the Ridge detection filter.
`static RidgeDetectionFilter`	`create(int ddepth, int dx, int dy, int ksize, int out_dtype, double scale, double delta, int borderType)`	Create pointer to the Ridge detection filter.
`protected void`	`finalize()`
`void`	`getRidgeFilteredImage(Mat _img, Mat out)`	Apply Ridge detection filter on input image.

Methods inherited from class org.opencv.core.Algorithm
clear, empty, getDefaultName, getNativeObjAddr, save

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

- Constructor Detail
  - RidgeDetectionFilter
```
protected RidgeDetectionFilter(long addr)
```
- Method Detail
  - __fromPtr__
```
public static RidgeDetectionFilter __fromPtr__(long addr)
```
  - create
```
public static RidgeDetectionFilter create(int ddepth,
                                          int dx,
                                          int dy,
                                          int ksize,
                                          int out_dtype,
                                          double scale,
                                          double delta,
                                          int borderType)
```
    Create pointer to the Ridge detection filter.
    
    Parameters:
    
    ddepth - Specifies output image depth. Defualt is CV_32FC1
    
    dx - Order of derivative x, default is 1
    
    dy - Order of derivative y, default is 1
    
    ksize - Sobel kernel size , default is 3
    
    out_dtype - Converted format for output, default is CV_8UC1
    
    scale - Optional scale value for derivative values, default is 1
    
    delta - Optional bias added to output, default is 0
    
    borderType - Pixel extrapolation method, default is BORDER_DEFAULT SEE: Sobel, threshold, getStructuringElement, morphologyEx.( for additional refinement)
    
    Returns:
    
    automatically generated
  - create
```
public static RidgeDetectionFilter create(int ddepth,
                                          int dx,
                                          int dy,
                                          int ksize,
                                          int out_dtype,
                                          double scale,
                                          double delta)
```
    Create pointer to the Ridge detection filter.
    
    Parameters:
    
    ddepth - Specifies output image depth. Defualt is CV_32FC1
    
    dx - Order of derivative x, default is 1
    
    dy - Order of derivative y, default is 1
    
    ksize - Sobel kernel size , default is 3
    
    out_dtype - Converted format for output, default is CV_8UC1
    
    scale - Optional scale value for derivative values, default is 1
    
    delta - Optional bias added to output, default is 0 SEE: Sobel, threshold, getStructuringElement, morphologyEx.( for additional refinement)
    
    Returns:
    
    automatically generated
  - create
```
public static RidgeDetectionFilter create(int ddepth,
                                          int dx,
                                          int dy,
                                          int ksize,
                                          int out_dtype,
                                          double scale)
```
    Create pointer to the Ridge detection filter.
    
    Parameters:
    
    ddepth - Specifies output image depth. Defualt is CV_32FC1
    
    dx - Order of derivative x, default is 1
    
    dy - Order of derivative y, default is 1
    
    ksize - Sobel kernel size , default is 3
    
    out_dtype - Converted format for output, default is CV_8UC1
    
    scale - Optional scale value for derivative values, default is 1 SEE: Sobel, threshold, getStructuringElement, morphologyEx.( for additional refinement)
    
    Returns:
    
    automatically generated
  - create
```
public static RidgeDetectionFilter create(int ddepth,
                                          int dx,
                                          int dy,
                                          int ksize,
                                          int out_dtype)
```
    Create pointer to the Ridge detection filter.
    
    Parameters:
    
    ddepth - Specifies output image depth. Defualt is CV_32FC1
    
    dx - Order of derivative x, default is 1
    
    dy - Order of derivative y, default is 1
    
    ksize - Sobel kernel size , default is 3
    
    out_dtype - Converted format for output, default is CV_8UC1 SEE: Sobel, threshold, getStructuringElement, morphologyEx.( for additional refinement)
    
    Returns:
    
    automatically generated
  - create
```
public static RidgeDetectionFilter create(int ddepth,
                                          int dx,
                                          int dy,
                                          int ksize)
```
    Create pointer to the Ridge detection filter.
    
    Parameters:
    
    ddepth - Specifies output image depth. Defualt is CV_32FC1
    
    dx - Order of derivative x, default is 1
    
    dy - Order of derivative y, default is 1
    
    ksize - Sobel kernel size , default is 3 SEE: Sobel, threshold, getStructuringElement, morphologyEx.( for additional refinement)
    
    Returns:
    
    automatically generated
  - create
```
public static RidgeDetectionFilter create(int ddepth,
                                          int dx,
                                          int dy)
```
    Create pointer to the Ridge detection filter.
    
    Parameters:
    
    ddepth - Specifies output image depth. Defualt is CV_32FC1
    
    dx - Order of derivative x, default is 1
    
    dy - Order of derivative y, default is 1 SEE: Sobel, threshold, getStructuringElement, morphologyEx.( for additional refinement)
    
    Returns:
    
    automatically generated
  - create
```
public static RidgeDetectionFilter create(int ddepth,
                                          int dx)
```
    Create pointer to the Ridge detection filter.
    
    Parameters:
    
    ddepth - Specifies output image depth. Defualt is CV_32FC1
    
    dx - Order of derivative x, default is 1 SEE: Sobel, threshold, getStructuringElement, morphologyEx.( for additional refinement)
    
    Returns:
    
    automatically generated
  - create
```
public static RidgeDetectionFilter create(int ddepth)
```
    Create pointer to the Ridge detection filter.
    
    Parameters:
    
    ddepth - Specifies output image depth. Defualt is CV_32FC1 SEE: Sobel, threshold, getStructuringElement, morphologyEx.( for additional refinement)
    
    Returns:
    
    automatically generated
  - create
```
public static RidgeDetectionFilter create()
```
    Create pointer to the Ridge detection filter. SEE: Sobel, threshold, getStructuringElement, morphologyEx.( for additional refinement)
    
    Returns:
    
    automatically generated
  - getRidgeFilteredImage
```
public void getRidgeFilteredImage(Mat _img,
                                  Mat out)
```
    Apply Ridge detection filter on input image.
    
    Parameters:
    
    _img - InputArray as supported by Sobel. img can be 1-Channel or 3-Channels.
    
    out - OutputAray of structure as RidgeDetectionFilter::ddepth. Output image with ridges.
  - finalize
```
protected void finalize()
                 throws java.lang.Throwable
```
    Overrides:
    
    finalize in class Algorithm
    
    Throws:
    
    java.lang.Throwable

Class RidgeDetectionFilter

Field Summary

Fields inherited from class org.opencv.core.Algorithm

Constructor Summary

Method Summary

Methods inherited from class org.opencv.core.Algorithm

Methods inherited from class java.lang.Object

Constructor Detail

RidgeDetectionFilter

Method Detail

__fromPtr__

create

create

create

create

create

create

create

create

create

getRidgeFilteredImage

finalize

fromPtr