1. In a document comparison system having a document reader communicating with a document inspection engine and configured for assessing whether a document read by the document reader is authentic, a method of analyzing a texture feature of the document for comparison with an expected texture feature characteristic of a predetermined printing method used to manufacture the document, the method comprising: a) obtaining a digital image of at least a portion of the document comprising a texture feature which is characteristic of the predetermined printing method used to manufacture the document; b) obtaining data for the document from an analysis of the texture feature of the digital image; c) comparing the data for the document obtained in step b) with expected data for the expected texture feature; and, d) generating a score based on a comparison between the obtained data for the document and the expected data; whereby the score is useful to assess whether the document is authentic by indicating whether the document was manufactured by the predetermined printing method.