Region of interest extraction from reference image using object map

A printing device comprising:

• printing hardware to print a test image corresponding to a reference image from which a plurality of regions of interest (ROIs) of a plurality of ROI types have been extracted based on an object map distinguishing symbol, raster, and vector objects within the reference image;
• scanning hardware to scan the printed test image;
• and
• hardware logic to:
• compare the ROIs of each ROI type within the reference image to corresponding ROIs within the scanned test image, yielding comparison results used to assess whether print quality of the printing device has degraded below a specified acceptable print quality level.