1. An image processing device comprising: a processor configured to: acquire original image data representing an original image; acquire a level selected from a plurality of levels that represent compression degrees; and compress the original image data according to the original image data and the selected level so as to generate compressed image data, wherein, to compress the original image data, the processor is configured to: compress first original image data using a first-type compression method when the original image data is the first original image data and when the selected level is a specific level of the plurality of levels; and compress second original image data using a second-type compression method that is different from the first-type compression method when the original image data is the second original image data and when the selected level is the specific level.