A visual security feature is provided that is disposed on a target. The visual security feature includes two substantially transparent layers. At least one of the two substantially transparent layers is present in an image-wise pattern.

A visual security feature is provided that is disposed on a target. The visual security feature includes two substantially transparent layers. At least one of the two substantially transparent layers is present in an image-wise pattern.

An identification device includes: an observation object shape frame display configured to display, on a display screen, an observation object shape image indicating a shape of an anti-counterfeit medium observed at an observation angle, and display image data that is an image of an imaging object of an image-capturing device, the anti-counterfeit medium being designed such that an observed pattern of light varies as the observation angle varies; a shape similarity calculator configured to calculate a shape similarity between the observation object shape image and an outer shape of the anti-counterfeit medium; and an imaging determinator configured to perform imaging determination as to whether the observation angle and an observation position of the image-capturing device are correct based on whether the shape similarity is equal to or greater than a shape similarity threshold.

An identification device includes: an observation object shape frame display configured to display, on a display screen, an observation object shape image indicating a shape of an anti-counterfeit medium observed at an observation angle, and display image data that is an image of an imaging object of an image-capturing device, the anti-counterfeit medium being designed such that an observed pattern of light varies as the observation angle varies; a shape similarity calculator configured to calculate a shape similarity between the observation object shape image and an outer shape of the anti-counterfeit medium; and an imaging determinator configured to perform imaging determination as to whether the observation angle and an observation position of the image-capturing device are correct based on whether the shape similarity is equal to or greater than a shape similarity threshold.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for enhancing skin tone in a ghost image are disclosed. In one aspect, a method includes the actions of receiving a color image. The actions further include converting the color image to a grayscale image. The actions further include generating a foreground image by removing background pixels from the grayscale image. The actions further include determining a foreground pixel value range of the pixel values of the foreground image. The actions further include generating a transfer function based on the foreground pixel value range, a minimum pixel value, and a maximum pixel value. The actions further include generating a transferred image by applying the transfer function to each pixel of the foreground image. The actions further include generating a monochrome image of the transferred image.

A flexible band configured to be connected to a data page and to a booklet, wherein the flexible band extends along a main direction and includes an upper side and a lower side as well as a plurality of apertures, wherein the flexible band includes at least one security element, wherein the security element is provided by at least one security print pattern; or the security element is provided by at least one security thread; or the security element is provided by at least one security print pattern in combination with at least one security thread.

A flexible band configured to be connected to a data page and to a booklet, wherein the flexible band extends along a main direction and includes an upper side and a lower side as well as a plurality of apertures, wherein the flexible band includes at least one security element, wherein the security element is provided by at least one security print pattern; or the security element is provided by at least one security thread; or the security element is provided by at least one security print pattern in combination with at least one security thread.

The invention relates to an absorbent medium for improving the overprintability, in particular by inkjet printing, of a security element, in particular an optically variable security element, comprising a binder, at least one pigment and an in particular aqueous solvent. The invention furthermore relates to a transfer film with an absorbent layer made of such an absorbent medium as well as a method for personalizing a security element using such a transfer film.

The invention relates to an absorbent medium for improving the overprintability, in particular by inkjet printing, of a security element, in particular an optically variable security element, comprising a binder, at least one pigment and an in particular aqueous solvent. The invention furthermore relates to a transfer film with an absorbent layer made of such an absorbent medium as well as a method for personalizing a security element using such a transfer film.

A security document has a carrier element which has a surface with a principal plane and a personalization region. A personalization layer is applied to the surface, such that the surface of the carrier element in the personalization region is configured with a plurality of structure elements uniformly aligned with each other and raised with respect to the principal plane. The structure elements of the plurality of structure elements are configured immediately adjacent to each other and the structure elements are configured with a center distance between vertical axes of the respective structure elements of less than 250 μm.