Shading device

Shading device configured to be integrated on a facade of a building wherein the shading device comprises an imaging system configured to exclusively create images of an outside view of the building, wherein the imaging system is integrated with the shading device, wherein the outside view comprises a sky portion and a landscape portion, and the imaging system comprises a lens and a processor,

• wherein the imaging system is configured to
• determine a directional luminance distribution of the outside view comprising the sky portion and the landscape portion from the images of the outside view comprising the sky portion and the landscape portion;
• compute a work-plane illuminance for a target work-plane inside a target room behind the shading device, at each position or state of the shading device, exclusively from the determined directional luminance distribution by making use of a pre-defined model of a target building and quantified light transmission behavior of the shading device, wherein the target work-plane is out of the field of view of the imaging system;
• evaluate a glare risk for occupants inside the target room;
• and
• determine an optimal position or state of the shading device which provides an optimal trade-off between work-plane illuminance and glare risk.