Patent ID: 7684056
Filing Date: 2010-03-23
Classification: G01C

Abstract:
1. A light detecting apparatus comprising: an imaging unit configured to pick up an image; a projector configured to radiate light in a predetermined range of the image; a first storage unit configured to store background information acquired by at least one imaging operation in the predetermined range with no light radiated; a second storage unit configured to store projection information acquired by at least two imaging operations in the predetermined range with the light radiated; and a light reception processor configured to extract radiated light from the projection information based on the background information stored in the first storage unit and the projection information stored in the second storage unit; and wherein the light reception processor is further configured to determine a complementary received light amount corresponding to a received light amount of a background information included in the projection information based on the received light amount and an imaging time of the background information included in the projection information and based on the imaging time and a number of times of imaging operations of the projection information, and to extract the radiated light by subtracting the complementary received light amount from a received light amount of the projection information.