inra.ijpb.binary.distmap

Class ChamferMask2DW4

java.lang.Object

inra.ijpb.binary.distmap.ChamferMask2D

inra.ijpb.binary.distmap.ChamferMask2DW4

public class ChamferMask2DW4
extends ChamferMask2D

Implementation of 2D Chamfer mask that manages four types of offsets types. Weights correspond to the four following vectors:

1. d(1,0)
2. d(1,1)
3. d(2,1)
4. d(3,1)

By default, computation is performed using integers.

Author:

dlegland

Nested Class Summary

Nested classes/interfaces inherited from class inra.ijpb.binary.distmap.ChamferMask2D

ChamferMask2D.FloatOffset, ChamferMask2D.ShortOffset

Field Summary

Fields inherited from class inra.ijpb.binary.distmap.ChamferMask2D

BORGEFORS, CHESSBOARD, CHESSKNIGHT, CITY_BLOCK, QUASI_EUCLIDEAN, VERWER

Constructor Summary

Constructors

Constructor and Description
ChamferMask2DW4(int a, int b, int c, int d) Creates a new ChamferWeights2DW3 object by specifying the weights associated to orthogonal and diagonal neighbors.
ChamferMask2DW4(short[] weights) Creates a new ChamferMask3D object by specifying the weights associated to orthogonal and diagonal neighbors.

Method Summary

Modifier and Type	Method and Description
Collection<ChamferMask2D.ShortOffset>	getBackwardOffsets()
Collection<ChamferMask2D.ShortOffset>	getForwardOffsets()
short	getShortNormalizationWeight()

Methods inherited from class inra.ijpb.binary.distmap.ChamferMask2D

fromWeights, fromWeights, fromWeights, getBackwardFloatOffsets, getFloatOffsets, getForwardFloatOffsets, getNormalizationWeight, getOffsets

Methods inherited from class java.lang.Object

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

Constructor Detail

ChamferMask2DW4

public ChamferMask2DW4(int a,
                       int b,
                       int c,
                       int d)

Creates a new ChamferWeights2DW3 object by specifying the weights associated to orthogonal and diagonal neighbors.

Parameters:

a - the weight associated to orthogonal neighbors

b - the weight associated to diagonal neighbors

c - the weight associated to chess-knight move neighbors

d - the weight associated to (3,1) shift and its permutations

ChamferMask2DW4

public ChamferMask2DW4(short[] weights)

Creates a new ChamferMask3D object by specifying the weights associated to orthogonal and diagonal neighbors.

Parameters:

weights - the weights associated to the different types of offset

Method Detail

getForwardOffsets

public Collection<ChamferMask2D.ShortOffset> getForwardOffsets()

Specified by:

getForwardOffsets in class ChamferMask2D

Returns:

the set of offsets defined by this ChamferMask2D for forward iteration using integer weights.

getBackwardOffsets

public Collection<ChamferMask2D.ShortOffset> getBackwardOffsets()

Specified by:

getBackwardOffsets in class ChamferMask2D

Returns:

the set of offsets defined by this ChamferMask2D for backward iteration using integer weights.

getShortNormalizationWeight

public short getShortNormalizationWeight()

Specified by:

getShortNormalizationWeight in class ChamferMask2D

Returns:

the weight associated to orthogonal offsets, that can be used to normalize the distance map.