| CPC G06V 20/95 (2022.01) [G06V 10/44 (2022.01); G06V 10/72 (2022.01); G06V 10/751 (2022.01); G06V 10/774 (2022.01)] | 20 Claims |
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1. A system for generating a fixed-size representation of a surface based on microstructural features for identification and authentication of a physical object, the system comprising:
a backend module configured to:
extract using a feature extractor, a plurality of microstructural features from a plurality of surfaces of the physical object;
determine an input sequence of tokens, wherein a token from the input sequence of tokens characterize the plurality of microstructural features of the surface of the physical object;
augment the input sequence of tokens with an additional token, wherein the additional token indicates a start or an end of the input sequence of tokens;
iteratively process the input sequence of tokens augmented with the additional token using an attention mechanism, wherein:
contextual information is exchanged between the tokens of the input sequence of tokens, and
the attention mechanism is trained on a training set of data from processing of the input sequence of tokens to extract the fixed-size representation of the surface of the physical object from a set of arbitrary size representations containing local microstructural features extracted from the surface;
determine an output of processing the input sequence of tokens augmented with the additional token as the fixed-size representation of the surface; and
determine a status of the physical object based on the fixed-size representation of the surface of the physical object.
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