US 12,446,135 B2
Light control device that performs light control of lighting device, light control system, and control method
Toru Kohno, Kanagawa (JP); Takayuki Shu, Kanagawa (JP); and Yuhei Hattori, Tokyo (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 16, 2023, as Appl. No. 18/184,772.
Claims priority of application No. 2022-048667 (JP), filed on Mar. 24, 2022.
Prior Publication US 2023/0309208 A1, Sep. 28, 2023
Int. Cl. H05B 47/115 (2020.01); H05B 45/00 (2022.01); H05B 45/325 (2020.01); H05B 45/395 (2020.01); H05B 47/19 (2020.01)
CPC H05B 47/115 (2020.01) 10 Claims
OG exemplary drawing
 
1. A light control system that includes an image capturing apparatus having an image capturing section for acquiring an image of an object, and a plurality of lighting devices each having a light emitting section, comprising:
at least one processor that executes respective functions of:
a detection unit configured to detect at least two types of information, among an object luminance, a shadow contrast value, and an outline contrast value, from the image of the object acquired by the image capturing section;
a light amount-setting unit configured to set a light amount of the light emitting section of each of the lighting devices; and
a light control unit configured to perform light control of the lighting devices according to the information detected by the detection unit and a role of the lighting devices, wherein
the lighting devices include at least two roles among key light, fill light, and back light, with each lighting device assigned a single role;
the detection unit detects the information according to the roles of the lighting devices;
the key light is configured to adjust lighting such that the object achieves a predetermined luminance level;
the fill light is configured to fill in shadows created by the key light; and
the back light is configured to cause an outline of the object to stand out.