A method for detecting a viewing-angle-dependent feature of a document using an image camera, wherein the viewing-angle-dependent feature comprises viewing-angle-dependent representations, the method comprising: capturing a first image of the document by the image camera in a first spatial position of the document relative to the image camera in order to obtain a first document image; capturing a second image of the document by the image camera in a second spatial position of the document relative to the image camera in order to obtain a second document image; and detecting an image difference between the first document image and the second document image in order to detect the viewing-angle-dependent feature of the document, wherein the image difference is segmented into a plurality of image segments, and wherein the viewing-angle-dependent feature of the document is detected on the basis of at least one image segment of the plurality of image segments, wherein an image segment measure is determined for an image segment of the plurality of image segments, and wherein the determined image segment measure is compared with a predetermined image segment measure in order to qualify the image segment for the detection of the viewing-angle-dependent feature; wherein an image segment of the plurality of image segments is assigned a first document image segment of the first document image and a second document image segment of the second document image, wherein the first document image segment is compared with the second document image segment in order to qualify the image segment for the detection of the viewing-angle-dependent feature; wherein the comparison of the first document image segment with the second document image segment is carried out by means of a normalized cross-correlation, and the image segment is qualified for the detection of the viewing-angle-dependent feature if the first document image segment and the second document image segment are different; wherein the capturing of the first image of the document further comprises a perspective rectification of the first document image on the basis of the first spatial position, and wherein the capturing of the second image of the document further comprises a perspective rectification the second document image based on the second spatial position; wherein the method further comprises determining the first spatial position of the document relative to the image camera on the basis of the first document image and/or determining the second spatial position of the document relative to the image camera on the basis of the second document image. capturing a first image of the document by the image camera in a first spatial position of the document relative to the image camera in order to obtain a first document image; capturing a second image of the document by the image camera in a second spatial position of the document relative to the image camera in order to obtain a second document image; and detecting an image difference between the first document image and the second document image in order to detect the viewing-angle-dependent feature of the document, wherein the image difference is segmented into a plurality of image segments, and wherein the viewing-angle-dependent feature of the document is detected on the basis of at least one image segment of the plurality of image segments, wherein an image segment measure is determined for an image segment of the plurality of image segments, and wherein the determined image segment measure is compared with a predetermined image segment measure in order to qualify the image segment for the detection of the viewing-angle-dependent feature; wherein an image segment of the plurality of image segments is assigned a first document image segment of the first document image and a second document image segment of the second document image, wherein the first document image segment is compared with the second document image segment in order to qualify the image segment for the detection of the viewing-angle-dependent feature; wherein the comparison of the first document image segment with the second document image segment is carried out by means of a normalized cross-correlation, and the image segment is qualified for the detection of the viewing-angle-dependent feature if the first document image segment and the second document image segment are different; wherein the capturing of the first image of the document further comprises a perspective rectification of the first document image on the basis of the first spatial position, and wherein the capturing of the second image of the document further comprises a perspective rectification the second document image based on the second spatial position; wherein the method further comprises determining the first spatial position of the document relative to the image camera on the basis of the first document image and/or determining the second spatial position of the document relative to the image camera on the basis of the second document image.