Abstract: Images in e-book and other electronic media content can be automatically enhanced for viewing on client devices, using various image categories, attributes, and expected qualities. Should systems and methods determine, based on the categories and attributes, that a given media object does not satisfy at least one rule for optimized presentation of the content on a particular client device, an updated presentation of the content can be generated, possibly in accordance with a predetermined specification. The updating may be in the form of image enhancement through adjustment of the size of the images in the media object. Machine learning schema can assist in recognizing images by category, importance and readability scoring, and in adjusting the images for optimal viewing.