SecuGen.FDxSDKPro.jni

Class SGWSQLib

java.lang.Object

SecuGen.FDxSDKPro.jni.SGWSQLib

public class SGWSQLib
extends java.lang.Object

This class is a JNI wrapper for the WSQ algorithm developed by the National Institute of Standards and Technology.

Field Summary

Fields

Modifier and Type	Field and Description
static float	BITRATE_15_TO_1 Yields around 15:1 compression.
static float	BITRATE_5_TO_1 Yields around 5:1 compression.

Constructor Summary

Constructors

Constructor and Description
SGWSQLib()

Method Summary

Modifier and Type	Method and Description
long	SGWSQDecode(byte[] fingerImageOut, int[] width, int[] height, int[] pixelDepth, int[] ppi, int[] lossyFlag, byte[] wsqImage, int wsqImageSize) Decode the WSQ image and return the RAW image.
long	SGWSQEncode(byte[] wsqImageOut, float wsqBitRate, byte[] fingerImage, int width, int height, int pixelDepth, int ppi) Encode a WSQ image.
long	SGWSQGetDecodedImageSize(int[] fingerImageOutSize, byte[] wsqImage, int wsqImageSize) Get the size of the RAW image contained in the WSQ image file.
long	SGWSQGetEncodedImageSize(int[] wsqImageOutSize, float wsqBitRate, byte[] fingerImage, int width, int height, int pixelDepth, int ppi) Get the size of the compressed WSQ image that will be returned when the RAW image file is compressed.

Methods inherited from class java.lang.Object

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

Field Detail

BITRATE_5_TO_1

public static final float BITRATE_5_TO_1

Yields around 5:1 compression.

See Also:

Constant Field Values

BITRATE_15_TO_1

public static final float BITRATE_15_TO_1

Yields around 15:1 compression.

See Also:

Constant Field Values

Constructor Detail

SGWSQLib

public SGWSQLib()

Method Detail

SGWSQGetDecodedImageSize

public long SGWSQGetDecodedImageSize(int[] fingerImageOutSize,
                                     byte[] wsqImage,
                                     int wsqImageSize)

Get the size of the RAW image contained in the WSQ image file. This function must be called before WSQDecode is called to allocate the size needed for the fingerimageOut buffer that will be populated with the raw image.

Parameters:

fingerImageOutSize - Integer array that will be populated with the size of the WSQ image.

wsqImage - Byte array containing the WSQ image.

wsqImageSize - The size of the WSQ image file.

SGWSQDecode

public long SGWSQDecode(byte[] fingerImageOut,
                        int[] width,
                        int[] height,
                        int[] pixelDepth,
                        int[] ppi,
                        int[] lossyFlag,
                        byte[] wsqImage,
                        int wsqImageSize)

Decode the WSQ image and return the RAW image. WSQGetDecodedImageSize() must be called first to allocate the size needed for the fingerimageOut buffer that will be populated with the raw image.

Parameters:

fingerImageOut - Byte array that will be populated with the AW image.

width - Integer array that will be populated with the RAW image width.

height - Integer array that will be populated with the RAW image height.

pixelDepth - Integer array that will be populated with the RAW image pixelDepth. Example 8 bits per pixel.

ppi - Integer array that will be populated with the RAW image resolution. Example 500 ppi.

lossyFlag - Integer array that will be populated with the RAW image width.

wsqImage - Byte array containing the WSQ image.

wsqImageSize - The size of the WSQ image file.

SGWSQGetEncodedImageSize

public long SGWSQGetEncodedImageSize(int[] wsqImageOutSize,
                                     float wsqBitRate,
                                     byte[] fingerImage,
                                     int width,
                                     int height,
                                     int pixelDepth,
                                     int ppi)

Get the size of the compressed WSQ image that will be returned when the RAW image file is compressed. This function must be called before WSQEncode() is called to allocate the size needed for the wsqImageOut buffer that will be populated with the raw image.

Parameters:

wsqImageOutSize - Integer array that will be populated with the size of the WSQ image.

wsqBitRate - Compression bitrate to be used. Either BITRATE_5_TO_1 or BITRATE_15_TO_1.

fingerImage - Byte array containing a raw fingerprint image.

width - Width of the raw image in pixels.

height - Height of the raw image in pixels.

pixelDepth - Pixel depth of the image. Example - 8 bits per pixel.

ppi - Image resolution.

See Also:

SGWSQLib

SGWSQEncode

public long SGWSQEncode(byte[] wsqImageOut,
                        float wsqBitRate,
                        byte[] fingerImage,
                        int width,
                        int height,
                        int pixelDepth,
                        int ppi)

Encode a WSQ image. WSQGetEncodedImageSize() must be called first to determine the size to be allocated for the wsqImageOut buffer.

Parameters:

wsqImageOut - Byte array that will be populated with the WSQ image.

wsqBitRate - Compression bitrate to be used. Either BITRATE_5_TO_1 or BITRATE_15_TO_1.

fingerImage - Byte array containing a raw fingerprint image.

width - Width of the raw image in pixels.

height - Height of the raw image in pixels.

pixelDepth - Pixel depth of the image. Example - 8 bits per pixel.

ppi - Image resolution.

See Also:

SGWSQLib