Nippon Telegraph and Telephone Corporation

Jiro Nagao

Kota Hidaka

Hidenobu Nagata

Mariko Yamaguchi

It is possible to inhibit deterioration of extraction precision of a subject and reliably extract the subject even when colors of the subject and a background are the same or similar. An image processing deviceincludes an input unitconfigured to input a first invisible light image of only a background in which a subject is not included and a second invisible light image in which the subject and the background are included and a subject region extraction unitconfigured to calculate a difference between a pixel value of each pixel of the second invisible light image and a pixel value of a corresponding pixel of the first invisible light image, determine whether the pixel is in a subject region or a background region in accordance with whether the difference is equal to or greater than a predetermined threshold, and extract the subject region from the second invisible light image. The first and second invisible light images are images captured in an environment in which an invisible light irradiation device is disposed so that invisible light is radiated to the background and the invisible light is not radiated to the subject.

Growing community of inventors

Tokyo, Japan

Jiro Nagao