Image capturing device and line variation noise reduction device

A line fluctuation noise reduction device that receives a detection signal outputted from a detector including a plurality of detection elements arranged two-dimensionally in a horizontal scan direction and a vertical direction, detecting a physical quantity of a detection target, and thereby outputting detection values of a plurality of detection points corresponding to the plurality of detection elements, the line fluctuation noise reduction device comprising

• processing circuitry configured to:
• calculate a detection value fluctuation amount as a fluctuation amount of each of the detection values in a time direction;
• calculate a line fluctuation amount as an average value of N detection value fluctuation amounts of N detection points in a partial line where N is an integer smaller than a total number of detection points in a horizontal scan line and the partial line is a range of N consecutive detection points in the horizontal scan line;
• calculate a variance value of the N detection value fluctuation amounts from the N detection value fluctuation amounts and the line fluctuation amount;
• calculate a movement adaptive weight based on the variance value;
• calculate a line fluctuation noise correction amount, corresponding to each of the detection values outputted from the detector, from the line fluctuation amount and the movement adaptive weight;
• and
• correct each of the detection values outputted from the detector by using the line fluctuation noise correction amount and thereby to generate the detection signal after the correction.