Just throwing this out there:
Would it be possible to have a script that crawls through images on
Commons, detects faces in the images, and embeds the x,y position of the
face(s) into the File page of the image (or into the Exif data of the
image) (and makes this information available via the API)?
For a little context -- in our mobile apps, we'll be featuring images
related to the article that the user is browsing; however, the way that
we're cropping the images sometimes has the side effect of cropping out the
face of the subject (when the face is far from the center of the image).
Even though we can do face detection locally on the user's device, it can
be a bit slow and a bit intensive. It would be great if this task was
offloaded, and the face position was returned right along with the image
itself...
-Dmitry