Being influenced by background radiation and opto-electrical response characteristics

the original digital image acquired by space optical remote sensor is very different from radiance image of real target. Therefore

the response function between input radiance and image grey level is established by calibrating the optical remote sensor to perform radiance image retrieval and radiation calibration. According to radiation transfer and conversion process of remote sensing signal

the physical concept of radiation response function is described using the model of Taylor progression and metric function

and a multiple regression analysis method for solving metric function is put forward. By applying a integrating sphere expanded radiation source

a civil camera is calibrated in Lab

and the response function is obtained. The result shows that the proposed method is feasible and practical. At last

the problem about physical meaning of radiation response function and radiometric precision are discussed.