Method of generating image information data, which can be printed in a forgery-proof manner, from information data, comprising the following steps: a) encoding the information data into a form of binary information pixels with a first or a second information color value by means of an encoding rule, wherein the binary information pixels are arranged in a grid-like manner in accordance with a first grid in respective first grid regions within an image region; b) dividing the respective first grid regions into respective second grid regions by means of a second grid, so that a plurality of second grid regions are formed per each first grid region; c) determining a respective information field (Ixy) of the respective second grid regions of the respective first grid region in accordance with a first association rule and determining the other second grid regions as faulty fields (Sxy); d) associating with the respective information field (Ixy), in dependence on the value of the information pixel, a first information color value for a value 1 and a second information color value for a value 0 in accordance with an information color value association rule; e) determining and associating with the respective faulty fields (Sxy) a respective fault color value in accordance with a fault color value association rule; and f) storing the second grid regions with the respective information color values (IF1, IF0) and fault color values as image information data and completing for a printing of the image information data; characterized in that g) in step e), the respective fault color value for the respective faulty field (Sxy) is determined by means of the fault color value association rule by generating a predefined averaged color value of the first grid region, averaged over the information field (Ixy) and the other faulty fields (Sxy). a) encoding the information data into a form of binary information pixels with a first or a second information color value by means of an encoding rule, wherein the binary information pixels are arranged in a grid-like manner in accordance with a first grid in respective first grid regions within an image region; b) dividing the respective first grid regions into respective second grid regions by means of a second grid, so that a plurality of second grid regions are formed per each first grid region; c) determining a respective information field (Ixy) of the respective second grid regions of the respective first grid region in accordance with a first association rule and determining the other second grid regions as faulty fields (Sxy); d) associating with the respective information field (Ixy), in dependence on the value of the information pixel, a first information color value for a value 1 and a second information color value for a value 0 in accordance with an information color value association rule; e) determining and associating with the respective faulty fields (Sxy) a respective fault color value in accordance with a fault color value association rule; and f) storing the second grid regions with the respective information color values (IF1, IF0) and fault color values as image information data and completing for a printing of the image information data;