1. An image processing apparatus configured to extract a print image to be printed onto a print medium from an original image, the image processing apparatus comprising: a processor; a memory storing computer-readable instructions that, when executed by the processor, instruct the processor to function as: a calculating unit that calculates a variation based on respective pixel values of a plurality of pixels; a detecting unit that detects a specific area from the original image, based on the variation; and an extracting unit that, when an extraction range having a predetermined shape including the print image is set in the original image, extracts the print image so that the specific area is disposed in a non-print area, which is not printed on the print medium, within the extraction range.