Method for correcting nonuniformity of space camera on-orbit radiation response

The invention discloses a method for correcting the nonuniformity of space camera on-orbit radiation response, belongs to the technical field of space camera on-orbit image processing, solves the problems that an ideal effect is difficult to achieve during correction, and the cost is high, and improves the real-time performance of interpretation. The method is characterized in that a two-point calibration correction method is adopted; dark field gray value points and subsaturated gray value points are selected; pixels have the same gray value after images are corrected under the condition that light is uniformly transmitted; the gray value of each pixel is equal to zero basically after the image are corrected under the condition of a dark field; and images are subjected to a minus operation and a multiplication operation sequentially, operation results are subjected to upper limit judgment, and the space camera on-orbit radiation response nonuniformity correction method is implemented. According to the nonuniformity correction method, a function of correcting the nonuniformity of the space camera radiation response is realized by the field programmable gate array (FPGA) software design of a space camera imaging controller; a few restriction is provided for modification of FPGA software, so that the flexibility of implementing correction is improved, and a good correction effect can be obtained; and downlink images can be directly interpreted, so that the real-time performance of space camera image interpretation is improved.