Package dev.brachtendorf.jimagehash.hashAlgorithms.filter

Class SobelFilter

java.lang.Object

dev.brachtendorf.jimagehash.hashAlgorithms.filter.SobelFilter

All Implemented Interfaces:

Filter, Serializable

public class SobelFilter
extends Object
implements Filter

Edge detection filter

 
                 1     0   -1
 Gx :    2     0   -2
         1     0   -1
                
                 1    2    1
 Gy:     0    0    0
                -1   -2   -1

 G : sqrt(Gx^2+ Gy^2)

 

Since:

2.0.0

Author:

Kilian

See Also:

Sobel Operator, Serialized Form

Constructor Summary

Constructors

Constructor	Description
SobelFilter(double threshold)	Create a sobel filter

Method Summary

Modifier and Type	Method	Description
BufferedImage	filter(BufferedImage bi)	Apply the filter to the input image and return an altered copy

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SobelFilter

public SobelFilter(double threshold)

Create a sobel filter

Parameters:

threshold - the cutoff beneath which gray values will be set to 0. [0 - 1].

Method Detail

filter

public BufferedImage filter(BufferedImage bi)

Description copied from interface: Filter

Apply the filter to the input image and return an altered copy

Specified by:

filter in interface Filter

Parameters:

bi - the input image to apply the filter on

Returns:

the altered image