42results about How to "Difficult to reproduce" patented technology

A biometric authentication apparatus includes an illumination section, an imaging section, a photographic subject placing section, and an authentication section. The illumination section irradiates at least near infrared light onto a biological portion placed in contact with a housing surface. The imaging section images a near infrared light image of the biological portion. The photographic subject placing section is provided in the vicinity of the illumination section, in which at least a part of the light emanation portion of the illumination section on a side where the imaging section is disposed is covered by the photographic subject when the photographic subject is placed. The authentication section performing biometric authentication by making a comparison between a specific pattern extracted from the near infrared light image of the biological portion imaged by the imaging section and a preliminarily registered specific pattern.

Luminescent materials and the use of such materials in anti-counterfeiting, inventory, photovoltaic, and other applications are described herein. In one embodiment, a luminescent material has the formula: [AaBbXxX′x′X″x″][dopants], wherein A is selected from at least one of elements of Group IA; B is selected from at least one of elements of Group VA, elements of Group IB, elements of Group IIB, elements of Group IIIB, elements of Group IVB, and elements of Group VB; X, X′, and X″ are independently selected from at least one of elements of Group VIIB; the dopants include electron acceptors and electron donors; a is in the range of 1 to 9; b is in the range of 1 to 5; and x, x′, and x″ have a sum in the range of 1 to 9. The luminescent material exhibits photoluminescence having: (a) a quantum efficiency of at least 20 percent; (b) a spectral width no greater than 100 nm at Full Width at Half Maximum; and (c) a peak emission wavelength in the near infrared range.

In an information recording area of a disc-shaped magnetic recording medium, recording columns adjacent to each other relative to a radial direction are formed so as to partially overlap with each other in the radial direction. Each recording column has an overlapping portion which partially overlaps with either of the adjacent recording columns in the radial direction, and a non-overlapping portion which does not overlap with any of the recording columns in the radial direction.

An image processing apparatus, an image processing method, and a program thereof, and a display device are provided, in which reproduction of a secret image from one dispersed image is difficult. A secret image and a reverse image included in at least two types of images are in a relationship of forming image data of an image not correlated with the secret image when luminance values of image data respectively are added pixel by pixel. Included are: a memory 101 that stores the inputted image data; a dispersed image creating / data allocating circuit 102 that creates image data of a plurality of dispersed images in which the secret image is formed when luminance values are added pixel by pixel based on the image data of the secret image and grayscales different from grayscale values of the secret image are allocated to the pixels respectively; and a shutter spectacle control signal creating circuit 103 that outputs a shutter control signal for setting a light shutter to a light transmission state only in a time for outputting image signals in accordance with the image data of the dispersed images.

A recording method, includes: discharging droplets of an ink composition, and adhering the droplets to a recording medium to form a first dot group using an ink jet recording apparatus; and adhering a lustrous ink composition containing a color material containing plate-like particles at least onto the first dot group to form a second dot group.