| 摘要 |
PROBLEM TO BE SOLVED: To prevent a video image from becoming unnatural by generating a difference of a signal level or changing a level of the difference between frames or between regions within a screen.SOLUTION: An imaging apparatus comprises: analog/digital conversion means (150) which uses a plurality of reference signals having inclinations that are different from each other; a constant voltage circuit (400) which supplies a plurality of analog signals at different output levels to the analog/digital conversion means; and calculation means (170 and 2) by which, a ratio of the inclinations and an offset amount are calculated based on a plurality of digital signals that are obtained by converting the plurality of analog signals at different output levels by the plurality of reference signals and a correction coefficient for correcting a digital signal corresponding to output from a pixel part (110) of an imaging element is calculated for each frame. The correction coefficient includes the ratio of the inclinations and an offset correction value, and the offset correction value is obtained by performing filtering processing that weights the offset amount and an offset correction value calculated in a previous frame by a cyclic coefficient.SELECTED DRAWING: Figure 1 |
