Ability to query for all images that 'depicts' something.
A tool that shows which articles have high text-to-image ratio
A tool that shows the list of articles without images in a given category
A tool that shows the largest available size of the image and date taken of an image on a Wikipedia page. This helps the editor to find out old and low resolution images, for replacing them with newer, high resolution images
As a second step, ability to query for the oldest/lowest resolution images used in pages of a given Wikipedia category.
On Wikidata, at the image section, one can have images of different kinds : abscess (gross pathology, histopathology, simplified illustrated diagram of abscess, photo of an abscess, abscess of lung, abscess of kidney, flowchart of abscess formation)
Some guidelines on what kind of images are to be used in articles? Avoid image overload? Use the right image for the context? (Existing image use policy of Wikipedia)
Larger resolution images over lower resolution images. Case of Gisela Storz (small) and (large) getting uploaded as separate files.
Wikidata query: Count the number of images in Wikipedia articles of a given category for say, Arabic and English Wikipedia and calculate the image/article ratio? Find out which Wikipedias are more visual oriented and which are less?
Why images of cusine, different types of lung malignancies etc. became important after the arrival of Wikidata? How knowledge became fine-tuned after Wikidata?