1. An imaging device comprising: an imaging unit configured to continuously image a field area and sequentially generate a plurality of image data; an image processing device comprising: a determining unit configured to determine, in accordance with two images corresponding to temporally adjacent image data input from the imaging unit, whether or not the field area at a time of imaging has been changed; and a suppressing unit configured to generate and output suppressed image data with an amount of visually recognizable information included in the images being suppressed by performing image processing of reducing at least one of a contrast and a chroma of the images responsive to the determining unit determining that the field area at the time of imaging has been changed due to panning, tilting, or another shooting screen changing operation to capture a desired subject after capture of an initial subject; and a display unit configured to display a suppressed image corresponding to the suppressed image data generated by the suppressing unit, wherein the imaging unit comprises: a lens unit configured to condense light from the field area and capable of adjusting a focus point; and an imaging element configured to generate the image data by receiving the light condensed by the lens unit, wherein the suppressing unit is configured to adjust the focus point of the lens unit such that an image corresponding to the image data generated by the imaging element becomes out of focus.