axip.ailia

Class AiliaFeatureExtractor

java.lang.Object

axip.ailia.AiliaFeatureExtractor

public class AiliaFeatureExtractor
extends java.lang.Object

AILIA feature extraction library (native API)

Field Summary

Fields

Modifier and Type	Field and Description
static int	DISTANCE_L2NORM Deprecated. Prease use AiliaFeatureExtractorDistanceType.L2NORM

Constructor Summary

Constructors

Constructor and Description
AiliaFeatureExtractor()

Method Summary

Modifier and Type	Method and Description
static void	Compute(long handle, float[] dst, int dstSize, byte[] src, int srcStride, int srcWidth, int srcHeight, int srcFormat) Performs feature extraction.
static long	Create(long netHandle, int format, int channel, int range, java.lang.String layerName) Creates a feature extraction instance.
static void	Destroy(long handle) It destroys the feature extraction instance.
static float	Match(long handle, int distanceType, float[] feature1, int feature1Size, float[] feature2, int feature2Size) Computes distances in feature space.

Methods inherited from class java.lang.Object

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

Field Detail

DISTANCE_L2NORM

@Deprecated
public static final int DISTANCE_L2NORM

Deprecated. Prease use AiliaFeatureExtractorDistanceType.L2NORM

See Also:

Constant Field Values

Constructor Detail

AiliaFeatureExtractor

public AiliaFeatureExtractor()

Method Detail

Create

public static long Create(long netHandle,
                          int format,
                          int channel,
                          int range,
                          java.lang.String layerName)
                   throws AiliaException

Creates a feature extraction instance.

Parameters:

netHandle - A network instance handle

format - The network image format (AiliaNetworkImageFormat)

channel - The network image channel (AiliaNetworkImageChannel)

range - The network image range (AiliaNetworkImageRange)

layerName - The name of the layer corresponding to the feature (fc1 for VGG16 and NULL for the last layer)

Returns:

A feature extraction instance handle

Throws:

AiliaException - Exception

Destroy

public static void Destroy(long handle)

It destroys the feature extraction instance.

Parameters:

handle - A feature extraction instance handle

Compute

public static void Compute(long handle,
                           float[] dst,
                           int dstSize,
                           byte[] src,
                           int srcStride,
                           int srcWidth,
                           int srcHeight,
                           int srcFormat)
                    throws AiliaException

Performs feature extraction.

Parameters:

handle - A feature extraction instance handle

dst - The feature data

dstSize - The size of the dst (in byte)

src - Image data (32 bpp)

srcStride - The number of bytes in 1 line

srcWidth - Image width

srcHeight - Image height

srcFormat - Image format (AiliaImageFormat)

Throws:

AiliaException - Exception

Match

public static float Match(long handle,
                          int distanceType,
                          float[] feature1,
                          int feature1Size,
                          float[] feature2,
                          int feature2Size)
                   throws AiliaException

Computes distances in feature space.

Parameters:

handle - A feature extraction instance handle

distanceType - The type of the distance in feature space AiliaFeatureExtractorDistanceType

feature1 - The feature

feature1Size - The size of the feature1 (in bytes)

feature2 - The other feature

feature2Size - The size of the feature2 (in bytes)

Returns:

A distance in feature space

Throws:

AiliaException - Exception