ChatGPT can accurately estimate Body Fat Percentage from photos

Methodology doesn&#x27;t support the conclusion.<p>Try using images that it wasn&#x27;t trained on.

I just fed 4o and o4 mini a photo of my torso and gave it my height and asked it to estimate my body weight and body fat %. It was 20-40 lbs too low, so way off.

So that is obviously a significant relationship between ChatGPT estimate and the Henselman Guide BFP numbers. But just being a significant relationship doesn&#x27;t necessarily mean it&#x27;s useful. I&#x27;d bet that BMI (which the author repeatedly mentions is outdated and not very useful), is almost certainly also significantly correlated with BFP values.<p>Eyeballing that plot, it looks like ChatGPT estimates are +&#x2F;- 10%. I&#x27;m wondering what the cutoff for usefulness is. I wouldn&#x27;t&#x27; be surprised if BMI is that level of correlated or better.

Dexa is expensive, you can get a modern smart scale for 50€, the cheapest accurate method would be the Caliper tongs.<p>What can it be good for? Video surveillance with metadata enrichment? Profiling? Losing body fat takes time. A smart mirror that displays body fat?

Just by looking at the graph I know that this will be rubbish - because of the line<p>When you draw a line this means that your model expects a linear relationship between the variables. Otherwise this is either a feel good line, or incompetence.

Given the images and text are definitely in the model training set, I&#x27;m surprised the results are this inaccurate.

Can AI estimate psychological profile based on a photo of the face (face structure)?