An image processing device has a shrinkage resizing processing unit (102) for subjecting an original image obtained from a single-plate color imaging element to shrinkage into an image corresponding to the display size of a display monitor, and a color rearrangement display data generation processing unit (103) for generating at least one type of color arrangement image capable of being applied to the color pixel array of the display monitor, on the basis of the shrunken image, wherein at least one type of shrunken image for display configured using the color information of the original image is created. Hence, it is possible to display quickly with minimal frame delay when displaying by generating and processing a small-size image for display from a large-size original image outputted from the imaging element.