Method and system for the authentication of hologram protected identity documents

A system for the authentication of a hologram protected document, the system comprising:

• a camera;
• at least one processor operatively connected to the camera, the at least one processor having an associated memory having stored therein processor executable code that when executed by the at least one processor performs the steps of:
• a) obtaining at least two images of the document from the camera;
• b) identifying in each of the at least two images pixels having a saturation and a value above respective saturation and value threshold;
• c) building a set of identified pixels connected components from the identified pixels of step b) for each of the least two images;
• d) removing from the set of identified pixels connected components any connected components belonging to a porous structure;
• e) computing a number of hues present in each remaining connected component of the set of identified pixels connected components and normalizing the number of hues according to a size of each of the remaining connected component from the set of identified pixels connected components;
• f) removing from the remaining connected components of the set of identified pixels connected components any connected component associated with a normalized number of hues below a specified hue number value;
• g) determining the presence of a hologram by computing a difference between color features of the remaining connected components of the set of identified pixels connected components of different images of the at least two images;
• h) setting a document score by computing an average of all the computed differences;
• i) authenticating the hologram protected document when the document score is above a specified document score value.