Real time estimation of indoor lighting conditions

A system for estimating an indoor lighting condition, the system comprising:

• an input module configured to acquire an image from a camera at a location within an indoor space at a selected time;
• and
• a processing module configured to, in response to acquiring the image, perform in real time a method that includes:
• determining the location from which the image is taken;
• estimating an outdoor sunlight density based on the location and the selected time;
• collecting a plurality of daylight factors, each daylight factor of the plurality of daylight factors corresponding to a characteristic of the indoor space;
• calculating an indoor daylight index for the indoor space in real time based on the outdoor sunlight density and the plurality of daylight factors;
• and
• presenting the indoor daylight index to a user in real time.

A computer program product for estimating an indoor lighting condition, the computer program product comprising:

• a computer readable storage medium having program instructions embodied therewith, the program instructions readable by a processing circuit to cause the processing circuit to perform a method comprising:
• acquiring an image from a camera at a location within an indoor space at a selected time;
• determining the location from which the image is taken;
• estimating an outdoor sunlight density based on the location and the selected time;
• collecting a plurality of daylight factors, each daylight factor of the plurality of daylight factors corresponding to a characteristic of the indoor space;
• calculating an indoor daylight index for the indoor space in real time based on the outdoor sunlight density and the plurality of daylight factors;
• and
• presenting the indoor daylight index to a user in real time.