Maybe not PhD, but as a research topic, I think doing this well is an interesting task. I learned that ceilings are not featureless. (I know, it's a kind of rid

Maybe not PhD, but as a research topic, I think doing this well is an interesting task. I learned that ceilings are not featureless. (I know, it's a kind of ridiculous to say I "learned" this, since I could have learned this from, oh well, looking at my ceiling just now, but it really was a surprise when I encountered this in machine learning data context.) Ceilings often have lightings! Lightings (either on and off) vary between geography and culture! (They do! Extreme variations!) Lightings, if on, will cause flares! We just sampled from actual distribution (privacy policy included we can monitor connection for anti-abuse and we can use data for research and development of anti-abuse), but dataset collected with care will be valuable. I am sure actually doing this will reveal other considerations, and even just with points I mentioned, it should be good enough for a paper, if not for PhD.