inra.ijpb.morphology.strel

Class LocalExtremumBufferGray8

java.lang.Object

inra.ijpb.morphology.strel.LocalExtremumBufferGray8

All Implemented Interfaces:

LocalExtremum

public class LocalExtremumBufferGray8
extends Object
implements LocalExtremum

Computes the maximum in a local buffer around current point.

This implementation considers a circular buffer (when a value is added, it replaces the first value that was inserted) that makes it possible to update extrema if needed.

Works only for Grayscale images coded between 0 and 255.

Author:

David Legland

Nested Class Summary

Nested classes/interfaces inherited from interface inra.ijpb.morphology.strel.LocalExtremum

LocalExtremum.Type

Constructor Summary

Constructors

Constructor and Description
LocalExtremumBufferGray8(int n) Main constructor.
LocalExtremumBufferGray8(int n, int value) Initializes an histogram filled with the given value.
LocalExtremumBufferGray8(int n, LocalExtremum.Type type) Constructor from size and type of extremum (minimum or maximum).

Method Summary

Modifier and Type	Method and Description
void	add(int value) Adds a value to the local histogram, and update bounds if needed.
void	clear() Resets inner counts with default maximal integer values (Integer.MIN_VALUE for MAX, Integer.MAX_VALUE for MIN)
void	fill(int value) Resets histogram by considering it is filled with the given value.
int	getMax() Returns the maximum value stored in this local histogram
void	setMinMaxSign(int sign) Changes the sign used for distinguishing minimum and maximum.

Methods inherited from class java.lang.Object

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

Constructor Detail

LocalExtremumBufferGray8

public LocalExtremumBufferGray8(int n)

Main constructor.

Parameters:

n - the size of the buffer

LocalExtremumBufferGray8

public LocalExtremumBufferGray8(int n,
                                LocalExtremum.Type type)

Constructor from size and type of extremum (minimum or maximum).

Parameters:

n - the size of the buffer

type - the type of extremum (maximum or minimum)

LocalExtremumBufferGray8

public LocalExtremumBufferGray8(int n,
                                int value)

Initializes an histogram filled with the given value.

Parameters:

n - the size of the buffer

value - the initial value of all elements in buffer

Method Detail

setMinMaxSign

public void setMinMaxSign(int sign)

Changes the sign used for distinguishing minimum and maximum.

Parameters:

sign - +1 for maximum, -1 for minimum

add

public void add(int value)

Adds a value to the local histogram, and update bounds if needed. Then removes the last stored value, and update bounds if needed.

Parameters:

value - the value to add

clear

public void clear()

Resets inner counts with default maximal integer values (Integer.MIN_VALUE for MAX, Integer.MAX_VALUE for MIN)

fill

public void fill(int value)

Resets histogram by considering it is filled with the given value. Update max and max accordingly.

Parameters:

value - the new value of all elements in buffer

getMax

public int getMax()

Returns the maximum value stored in this local histogram

Returns:

the maximum value in neighborhood