公开(公告)号：EP3637378A1

公开(公告)日：2020-04-15

申请号：EP18805832.5

申请日：2018-05-25

Applicant: Toppan Printing Co., Ltd.

Inventor： MASUDA, Tomohito ,  MIYAMOTO, Eri

IPC: G07D7/121 ,  G02B5/18 ,  G07D7/17 ,  G07D7/206

Abstract: An identification apparatus includes an estimation unit that estimates an operating distance between the surface of an optical device and an imaging unit as an estimated value. A reference distance refers to the distance between a first face of an identification target and the imaging unit and at which light diffracted by a diffraction grating is capable of being recorded by the imaging unit. The identification apparatus includes a first determination unit that determines whether the estimated value matches the reference distance and a second determination unit that determines whether an image captured by the imaging unit matches a reference image. Conditions for identifying the optical device as the identification target include a condition that the first determination unit determines that the estimated value matches the reference distance and a condition that the second determination unit determines that the image captured by the imaging unit matches the reference image. When these conditions are satisfied, the identification apparatus identifies the optical device as the identification target.

公开(公告)号：EP3493538A1

公开(公告)日：2019-06-05

申请号：EP17834056.8

申请日：2017-07-13

Applicant: Toppan Printing Co., Ltd.

Inventor： OKADA, Takashi ,  MASUDA, Tomohito ,  MORIMOTO, Tetsuro

IPC: H04N9/04 ,  B42D25/328 ,  G01J3/02 ,  G01J3/50 ,  G02B5/32 ,  G03H1/26

Abstract: This color calibration device is a color calibration device, calibrating colors in a captured image of a first imaging device between different imaging devices using a hologram emitting diffracted light at different frequencies corresponding to an observation angle, the color calibration device includes: a diffracted light spectral distribution calculation unit that obtains respective diffracted light spectral distribution of the diffracted light from the hologram; a camera sensitivity function estimation unit that estimates spectral sensitivity of the imaging device from the respective diffracted light spectral distribution of the diffracted light and each captured image of the diffracted light; and a color calibration unit that calibrates difference in color of the first imaging device relative to a second imaging device different from the first imaging device using the estimated spectral sensitivity.