Privacy preserving document analysis

A system comprising:

• a processor;
• and
• computer-readable storage media having stored instructions that, responsive to execution by the processor, cause the processor to perform operations including:
• populating a stamp embedding space by processing a plurality of stamp representations with a trained stamp encoding model to create a plurality of stamp embeddings, each respective one of the plurality of stamp representations corresponding to a respective source document and containing information derived from the respective source document without containing text or images of the respective source document, wherein the plurality of stamp embeddings characterizes features of the plurality of stamp representations in a plurality of numerical values;
• generating a plurality of clusters within the stamp embedding space based on locations of the plurality of stamp embeddings within the stamp embedding space, wherein the locations of the plurality of stamp embeddings are based on the plurality of numerical values;
• receiving an additional stamp representation;
• projecting the additional stamp representation into the stamp embedding space by processing the additional stamp representation with the stamp encoding model to create an additional stamp embedding;
• and
• comparing a location of the additional stamp embedding within the stamp embedding space with the plurality of clusters for use in deriving insights pertaining to a document corresponding to the additional stamp representation.

One or more computer-readable storage media having stored instructions that are executable to perform operations comprising:

• populating a stamp embedding space by processing a plurality of stamp representations with a trained stamp encoding model to create a plurality of stamp embeddings, each respective one of the plurality of stamp representations corresponding to a respective source document and containing information derived from the respective source document without containing text or images of the respective source document, wherein the plurality of stamp embeddings characterizes features of the plurality of stamp representations in a plurality of numerical values;
• generating a plurality of clusters within the stamp embedding space based on locations of the plurality of stamp embeddings within the stamp embedding space wherein the locations of the plurality of stamp embeddings are based on the plurality of numerical values;
• receiving an additional stamp representation;
• projecting the additional stamp representation into the stamp embedding space by processing the additional stamp representation with the stamp encoding model to create an additional stamp embedding;
• and
• comparing a location of the additional stamp embedding within the stamp embedding space with the plurality of clusters for use in deriving insights pertaining to a document corresponding to the additional stamp representation.