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4.2 Signature Filter

Signature filter computes signatures in the TransApplet: the input is an image and the output is a signature.

The filter has two classes: Signature Generator and Signature Filter. The interface for Signature Generator is:

public interface I_SignatureGenerator

{

bool setSignatureFilter (int x);

int getSignatureFilter ();

ImageSignature getSignature (Bitmap b);

int getSignatureFilterSize ();

string [] getSignatureFilterNames();

}//class

The following table lists the functions.

Function	Descriptions
ImageSignature getSignature (Bitmap b)	Gets the signature of the input image. Input: Bitmap b Output: Signature.
int getSignatureFilterSize ()	Gets the number of attributes the library of signatures.
bool setSignatureFilter (int x)int getSignatureFilter ()	Selects a Signature Generator.

The interface for Signature Filter is:

public interface I_SignatureFilter

{

bool setSignatureFilter (int x);

int getSignatureFilter ();

string [] getSignatureFilterNames();

ImageSignature getSignature (string imagePath, string ID);

ImageSignature getSignature (string imagePath);

ImageSignature getSignature (Bitmap b, string ID);

ImageSignature getSignature (Bitmap b);

ImageSignature getSignature

( string imagePath, string ID,int x, int y, int w, int h);

ImageSignature getSignature

( Bitmap bImg, string path, string name, string ID,

int x, int y, int w, int h);

bool getLibrary ( string [] imageAbsolutePath, string fileName );

bool getLibrary

( string [] imageAbsolutePath, string [] IDs, string fileName );

bool getSegmentLibrary ( string [] imageAbsolutePath,

string [] IDs,

string [] xs,

string [] ys,

string [] ws,

string [] hs,

string fileName );

bool getSegmentLibrary ( string [] imageAbsolutePath,

string [] IDs,

int [] xs,

int [] ys,

int [] ws,

int [] hs,

string fileName );

}//class

The following table lists the functions.

Function	Descriptions
bool setSignatureFilter (int x)int getSignatureFilter ()	Selects a Signature filter.
string [] getSignatureFilterNames();	Gets a list of Signature filter names.
ImageSignature getSignature (string imagePath, string ID); ImageSignature getSignature (string imagePath); ImageSignature getSignature (Bitmap b, string ID); ImageSignature getSignature (Bitmap b);	Gets the Signature of the input image.
ImageSignature getSignature( string imagePath, string ID,int x, int y, int w, int h); ImageSignature getSignature( Bitmap bImg, string path, string name, string ID,int x, int y, int w, int h);	Gets the Signature of the input image segment. Input: string imagePath, or Bitmap bImg string ID int x, int y, int w, int h. Output: Signature.
bool getLibrary ( string [] imageAbsolutePath, string fileName ); bool getLibrary( string [] imageAbsolutePath, string [] IDs, string fileName ); bool getSegmentLibrary ( string [] imageAbsolutePath, string [] IDs,string [] xs,string [] ys,string [] ws,string [] hs,string fileName ); bool getSegmentLibrary ( string [] imageAbsolutePath, string [] IDs,int [] xs,int [] ys,int [] ws,int [] hs,string fileName );	Generates a Signature library from all images in string [] imageAbsolutePath and produce a file that contains all signatures. Input: string [] imageAbsolutePath Output: A text file that contains the library of signatures.

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