4.4   Signature Matching

Both BioFilter and Unsupervised Filter match two whole images. BioFilter is better than Unsupervised Matching, but it requires a process called training. Training teaches the BioFilter who should match with whom. The BioFilter learns how to match the image features.

•    The advantage of the BioFilter is that it does not require a lot of training data.
•    The disadvantage of the BioFilter is that it has a lower identification rate than the Neural Filter.

NeuralFilter also matches two whole images, which is similar to the BioFilter. NeuralFilter is better than both Unsupervised Filter and BioFilter, but it requires a large amount of training data. Training data teaches the NeuralFilter who should match with whom. In comparison:

•    The advantage of the NeuralFilter is that it is more accurate.
•    The disadvantage of the NeuralFilter is that it requires more training data than BioFilter.

The interfaces for BioFilter and Unsupervised Filter are basically the same except the Unsupervised Filter does not have the training part. The interfaces for BioFilter and Neural Filter are identical. The interface for BioFilter is:

public interface I_BioFilter

    {

bool training ( string a1_txt, string match_txt);

 

        Attrasoft.TransApplet70.Results_1N .Results_1N findMatch11

            ( Attrasoft.TransApplet70.ImageSignature70.ImageSignature sig1,

            Attrasoft.TransApplet70.ImageSignature70.ImageSignature sig2);

 

        Attrasoft.TransApplet70.Results_1N .Results_1N findMatch11

(string path1, string path2);

        Attrasoft.TransApplet70.Results_1N .Results_1N findMatch11

(Bitmap left, Bitmap right);

        

        Attrasoft.TransApplet70.Results_1N.Results_1N findMatch1N

            (Attrasoft.TransApplet70.ImageSignature70.ImageSignature sig,

 string a1File, string b1File);

        Attrasoft.TransApplet70.Results_1N.Results_1N findMatch1N

(string keyuPath, string a1File, string b1File);

        Attrasoft.TransApplet70.Results_1N.Results_1N findMatch1N

(Bitmap keyImage, string a1File, string b1File);

        

        bool findMatchNN (string a1File, string b1File);

        bool findMatchNM (string a1File, string a2File, string b1File);

    }

The following table lists the functions.

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