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2.5 Signature Matching
In this phase, a unique image signature is computed for each image. Different images will have different signatures. The Signature Matching is based on these image signatures. This matching can easily reach the speed of 1,000,000 per second and is very fast.
A typical image has a dimension of say 480x640, or 300,000 pixels. A Feature Space of an image is a collection of variables computed from a given image. The number of variables in a Feature Space is usually less than 1% of the number of pixels. As a result, the matching in the Feature Space is much faster than Pixel Matching.
The following filters implement the Signature matching:
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Unsupervised Filter
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BioFilter
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Neural Filter
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