org.openimaj.image.processing.face.alignment

Class RotateScaleAligner

java.lang.Object

org.openimaj.image.processing.face.alignment.RotateScaleAligner

All Implemented Interfaces:

FaceAligner<KEDetectedFace>, ReadableBinary, ReadWriteableBinary, WriteableBinary

public class RotateScaleAligner
extends Object
implements FaceAligner<KEDetectedFace>

Attempt to align a face by rotating and scaling it. Facial Keypoints are used to judge the alignment. Specifically, the distance between the eyes is normalised by scaling, and the eyes are rotated to be level. The face is then translated to a known position (again, based on the eyes).

Author:

Jonathon Hare (jsh2@ecs.soton.ac.uk)

Constructor Summary

Constructors

Constructor and Description
RotateScaleAligner() Default constructor with no mask.
RotateScaleAligner(FImage mask) Construct with a mask (in the canonical frame) to apply after alignment.
RotateScaleAligner(int targetSize) Default constructor with no mask.

Method Summary

Modifier and Type	Method and Description
FImage	align(KEDetectedFace descriptor) For the provided face detection, return an aligned version of the face.
byte[]	binaryHeader() Header for binary input.
FImage	getMask() Return a mask image for aligned faces.
void	readBinary(DataInput in) Read internal state from in.
void	writeBinary(DataOutput out) Write the content of this as binary to out.

Methods inherited from class java.lang.Object

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

Constructor Detail

RotateScaleAligner

public RotateScaleAligner()

Default constructor with no mask.

RotateScaleAligner

public RotateScaleAligner(int targetSize)

Default constructor with no mask.

Parameters:

targetSize - target aligned image size

RotateScaleAligner

public RotateScaleAligner(FImage mask)

Construct with a mask (in the canonical frame) to apply after alignment.

Parameters:

mask - The mask.

Method Detail

align

public FImage align(KEDetectedFace descriptor)

Description copied from interface: FaceAligner

For the provided face detection, return an aligned version of the face.

Specified by:

align in interface FaceAligner<KEDetectedFace>

Parameters:

descriptor - the face to align

Returns:

aligned face

getMask

public FImage getMask()

Description copied from interface: FaceAligner

Return a mask image for aligned faces. 0 pixels mark background pixels that should be ignored in further processing of aligned faces produced by this aligner.

Specified by:

getMask in interface FaceAligner<KEDetectedFace>

Returns:

a mask image, or null if masking isn't required

readBinary

public void readBinary(DataInput in)
                throws IOException

Description copied from interface: ReadableBinary

Read internal state from in.

Specified by:

readBinary in interface ReadableBinary

Parameters:

in - source to read from.

Throws:

IOException - an error reading input

binaryHeader

public byte[] binaryHeader()

Description copied from interface: ReadableBinary

Header for binary input. Will be automatically read by IOUtils when using readBinary().

Specified by:

binaryHeader in interface ReadableBinary

Specified by:

binaryHeader in interface WriteableBinary

Returns:

header

writeBinary

public void writeBinary(DataOutput out)
                 throws IOException

Description copied from interface: WriteableBinary

Write the content of this as binary to out.

Specified by:

writeBinary in interface WriteableBinary

Parameters:

out - sink to write to

Throws:

IOException - an error writing to out