PrewittEdgeDetector (DMLab Library API for 0.0.4-SNAPSHOT)

java.lang.Object
- edu.gsu.cs.dmlab.imageproc.edgedetection.detectors.GaussianEdgeDetector
- - edu.gsu.cs.dmlab.imageproc.edgedetection.detectors.PrewittEdgeDetector

```
public class PrewittEdgeDetector
extends GaussianEdgeDetector
```
This class detects the edges of grayscale images using Prewitt convolution kernel.
Note: The final matrix of edges is slightly smaller than the original image. The difference depends on the size of the kernel matrix.

Author:

Jason Altschuler, modified by Azim Ahmadzadeh and Dustin Kempton of Data Mining Lab, Georgia State University

See Also:

ImageConvolution

Field Summary
- Fields inherited from class edu.gsu.cs.dmlab.imageproc.edgedetection.detectors.GaussianEdgeDetector
  edges, L1norm, threshold

Constructor Summary

Constructors
Constructor	Description
`PrewittEdgeDetector(double[][] image)`	All work is done in constructor.
`PrewittEdgeDetector(double[][] image, boolean L1norm)`	All work is done in constructor.
`PrewittEdgeDetector(String filePath)`	All work is done in constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

double[][] getXkernel()
Abstract methods to implement

double[][] getYkernel()
- Methods inherited from class edu.gsu.cs.dmlab.imageproc.edgedetection.detectors.GaussianEdgeDetector
  findEdges, getEdges, getL1norm, getThreshold
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PrewittEdgeDetector
```
public PrewittEdgeDetector(String filePath)
```
    All work is done in constructor.
    
    Parameters:
    
    filePath - path to image
  - PrewittEdgeDetector
```
public PrewittEdgeDetector(double[][] image)
```
    All work is done in constructor.
    Uses L2 norm by default.
    
    Parameters:
    
    image - the image to process
  - PrewittEdgeDetector
```
public PrewittEdgeDetector(double[][] image,
                           boolean L1norm)
```
    All work is done in constructor.
    Gives option to use L1 or L2 norm.
    
    Parameters:
    
    image - image to process
    
    L1norm - indicates whether to use L1 norm, L2 will be used if false
- Method Detail
  - getXkernel
```
public double[][] getXkernel()
```
    Description copied from class: GaussianEdgeDetector
    
    Abstract methods to implement
    
    Specified by:
    
    getXkernel in class GaussianEdgeDetector
  - getYkernel
```
public double[][] getYkernel()
```
    Specified by:
    
    getYkernel in class GaussianEdgeDetector