The present disclosure relates to an imaging apparatus comprising an image sensor that includes an imaging surface in which many pixels are arranged vertically and horizontally, a pixel control unit that controls the image sensor, selects a pixel corresponding to a sampling function among pixels configuring a block by applying the sampling function for each block acquired by partitioning the imaging surface of the image sensor into a plurality of blocks, and outputs a sampling signal based on a pixel value of the selected pixel, and a reduced image generating unit that generates a reduced image on the basis of the sampling signal for each block output from the image sensor.