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25.4 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:
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Click the “Source” button to select a directory;
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Click “Signature/N Signature (a1.txt)” to compute the signatures in a1.txt.
Example. Select N-images:
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Click the Source button;
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Select image, ./input_file/2067(1).jpg, here “./” means the folder where the ImageFinder is located;
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Click “Signature/N Signature (a1.txt)”;
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Open “./data/a1.txt” to see the results.
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