# WATCH: Photo Math, a smartphone camera calculator

**xeni**#1

**shaddack**#4

Add this function for augmented reality glasses (or at least allow showing just the overlay with no background, for DIY mods), support more advanced symbolic operations (link to Wolfram-Alpha?). Add automatic unit (and exchange rate and so) conversions. Support recognition of handwriting. Support user-writable plugins, support QR-codes and user-defined symbol overlays (e.g. write a âsigilâ on paper, get an assigned value (incoming emails, live tweets/news, stock ticker/graph, weather forecastâŚ), warehouse database link for showing the content of a box, multimeter output hovering above the tip of the probe (so you wonât have to look away from the probe, which is when it slips)âŚ Billions of uses.

**shaddack**#6

We should write a proposal for the CastAR dev team. The future is near, very near.

Edit: Another silly thought: such âsigilâ written with a pen (or maybe even tattooed) on oneâs wrist. Voila, smartwatch!

Yet another idea. Leverage the sensitivity of silicon in the near-IR range, use infrared ink. Invisible sigils!

**bob_probst**#8

I donât see this tool having much use outside of a math class. And in a math class it sort of defeats the learning process.

**knappa**#9

Iâve already had students, at the college level, who didnât know how to multiply by zero without a calculator. So Iâm not sure that this could possibly make things worse.

BTW, I note that it doesnât solve quadratics; just linear equations.

**WearySky**#13

Incidentally - I downloaded and tried it, and at the very least it doesnât seem to be able to scan equations off a computer monitor. Iâm too lazy to walk over to the printer to see how it handles equations printed on paper.

**WearySky**#15

It actually shows the steps to solving the equation, as well. So presumably this is meant to be a learning tool.

**knappa**#16

Yes, it looks like you will still have to compute â yourself. Doesnât compute Donaldson invariants either, what a piece of junk!

**knappa**#17

Or linear equations, apparently:

courtesy of http://blog.mrmeyer.com/2014/we-should-wish-photomath-all-the-success-in-the-world/

**tachin1**#18

Walk around the city, symbols painted around town trigger virtual ads all over the place.

Yes, so many uses.

âShuddersâ

**shaddack**#19

Adblock. Every platform needs it.

âŚand with AR it can even provide billboard overlays.

**Jerry_Vandesic**#20

This is primarily a computer vision problem. As long as you can transcribe the math, it would be fairly easy to call Wolfram Alpha to actually solve the equation. In addition, Wolfram Alpha, being built on Mathematica, can solve equations much more complex than simple linear combinations of x.