georegression.struct.homography

Class Homography2D_F32

java.lang.Object

georegression.struct.Matrix3x3_F32

georegression.struct.homography.Homography2D_F32

All Implemented Interfaces:

Homography<Homography2D_F32>, InvertibleTransform<Homography2D_F32>, java.io.Serializable

public class Homography2D_F32
extends Matrix3x3_F32
implements Homography<Homography2D_F32>

Describes a homography transform in 2D.

See Also:

Serialized Form

Field Summary

Fields inherited from class georegression.struct.Matrix3x3_F32

a11, a12, a13, a21, a22, a23, a31, a32, a33

Constructor Summary

Constructors

Constructor and Description
Homography2D_F32()
Homography2D_F32(float a11, float a12, float a13, float a21, float a22, float a23, float a31, float a32, float a33)
Homography2D_F32(Homography2D_F32 a)

Method Summary

Modifier and Type	Method and Description
Homography2D_F32	concat(Homography2D_F32 second, Homography2D_F32 ret) Computes a transform which is the equivalent to applying 'this' then the 'second' transform.
Homography2D_F32	copy()
Homography2D_F32	createInstance() Creates a new instance of the same SpecialEuclidean as this class.
float	get(int row, int col)
int	getDimension() Returns the dimension of the space which this transform operates on.
Homography2D_F32	invert(Homography2D_F32 ret) Computes a transform which is the inverse of this transform.
void	reset() Sets the transform to its initial state of no transform.
void	set(Homography2D_F32 target) Assigns 'this' to the value of target.
java.lang.String	toString()

Methods inherited from class georegression.struct.Matrix3x3_F32

getA11, getA12, getA13, getA21, getA22, getA23, getA31, getA32, getA33, scale, set, set, setA11, setA12, setA13, setA21, setA22, setA23, setA31, setA32, setA33, zero

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Homography2D_F32

public Homography2D_F32(float a11,
                        float a12,
                        float a13,
                        float a21,
                        float a22,
                        float a23,
                        float a31,
                        float a32,
                        float a33)

Homography2D_F32

public Homography2D_F32(Homography2D_F32 a)

Homography2D_F32

public Homography2D_F32()

Method Detail

getDimension

public int getDimension()

Description copied from interface: InvertibleTransform

Returns the dimension of the space which this transform operates on.

Specified by:

getDimension in interface InvertibleTransform<Homography2D_F32>

Returns:

space's dimension

createInstance

public Homography2D_F32 createInstance()

Description copied from interface: InvertibleTransform

Creates a new instance of the same SpecialEuclidean as this class.

Specified by:

createInstance in interface InvertibleTransform<Homography2D_F32>

Returns:

A new instance.

set

public void set(Homography2D_F32 target)

Description copied from interface: InvertibleTransform

Assigns 'this' to the value of target.

Specified by:

set in interface InvertibleTransform<Homography2D_F32>

Parameters:

target - The new value of 'this'.

concat

public Homography2D_F32 concat(Homography2D_F32 second,
                               Homography2D_F32 ret)

Description copied from interface: InvertibleTransform

Computes a transform which is the equivalent to applying 'this' then the 'second' transform.

For example:

Point A = tran2( tran1( A ) );
Point A = tran12( A );

where tran12 = tran1.concat( tran2 , null );

NOTE: 'second', 'result', and 'this' must all be unique instances.

Specified by:

concat in interface InvertibleTransform<Homography2D_F32>

Parameters:

second - The second transform which is applied. Not modified.

ret - A transform which is equivalent to applying the first then the second. If null then a new instance is declared. Modified.

Returns:

The equivalent transform.

invert

public Homography2D_F32 invert(Homography2D_F32 ret)

Description copied from interface: InvertibleTransform

Computes a transform which is the inverse of this transform. The 'this' matrix can be passed in as an input.

Example:
Point A = tran(B);
Point B = inv(A);

where inv = invert( tran );

Specified by:

invert in interface InvertibleTransform<Homography2D_F32>

Parameters:

ret - Where the inverse will be stored. If null a new instance is created. Modified.

Returns:

The inverse transform.

reset

public void reset()

Description copied from interface: InvertibleTransform

Sets the transform to its initial state of no transform.

Specified by:

reset in interface InvertibleTransform<Homography2D_F32>

get

public float get(int row,
                 int col)

copy

public Homography2D_F32 copy()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object