Patents by Inventor Takuji Tokiwa

Takuji Tokiwa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Two-dimensional code generation device, two-dimensional code generation method, and non-transitory computer-readable recording medium
    Patent number: 10102463
    Abstract: In a two-dimensional code generation device (100), a white point determiner (111) determines a white point in an environment to output a two-dimensional code. A threshold acquirer (112) acquires a threshold of lightness used by a reading device for reading multiple cells in binary, the threshold being represented in a device-independent color space that is based on the white point determined by the white point determiner (111). A two-dimensional code generator (113) generates a two-dimensional code expressing information by a distribution pattern of multiple cell dots formed by coloring the multiple cells in a color of lightness equal to or higher than the threshold acquired by the threshold acquirer (112) and in a color of lightness lower than the threshold.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: October 16, 2018
    Assignee: A.T Communications Co., Ltd.
    Inventors: Hiroshi Toyoizumi, Youichi Azuma, Toshiki Nishiyama, Takuji Tokiwa
  • TWO-DIMENSIONAL CODE GENERATION DEVICE, TWO-DIMENSIONAL CODE GENERATION METHOD, AND PROGRAM
    Publication number: 20180025263
    Abstract: In a two-dimensional code generation device (100), a white point determiner (111) determines a white point in an environment to output a two-dimensional code. A threshold acquirer (112) acquires a threshold of lightness used by a reading device for reading multiple cells in binary, the threshold being represented in a device-independent color space that is based on the white point determined by the white point determiner (111). A two-dimensional code generator (113) generates a two-dimensional code expressing information by a distribution pattern of multiple cell dots formed by coloring the multiple cells in a color of lightness equal to or higher than the threshold acquired by the threshold acquirer (112) and in a color of lightness lower than the threshold.
    Type: Application
    Filed: January 13, 2015
    Publication date: January 25, 2018
    Inventors: Hiroshi Toyoizumi, Youichi Azuma, Toshiki Nishiyama, Takuji Tokiwa