Image Signature

Image Matching is done through something called Image Signature. 
An image has a set of computed values called features. A collection 
of features is grouped into a signature. 

Signature Menu computes signatures in the ImageFinder: the input is 
an image and the output is a signature.

In a 1:N match, the 1-signature is computed at run time and the 
N-signature is computed in advance. 

To compute the N-signatures:

 Click the Source button to select a directory;
 Click Signature/N Signature (a1.txt) to compute the signatures in a1.txt. 

Example. Select N-images:

 Click the Source button;
 Select image, ./input_file/2067(1).jpg, 
	here ./ means the folder where the ImageFinder is located;
 Click Signature/N Signature (a1.txt);
 Open ./data/a1.txt to see the results.

