image - How to transform SoundWave Picture to sound?

I would like to recreate a sound from a picture of a soundwave.

But i see a lot of theorical question.

And im not sure its possible....

I mean, it is possible to create a sound...

But to make the sound as close as possible of the original one, sound a bit harder.

Most of the time when you see soundwave as art...

It's really time compressed.

I would love to have a tatoo of the soundwave of someone important to me that say a word to me.

And then with my smartphone point the camera at the tatoo and hear it again.

But i have a lot of question about this.

First how can i get the periodicity? Per pixel i will probably got a lot of periode. How can i decide the lenght of my whole song? I have a sound wave but no legend. so it can be 1s or 160s compressed i can never know....

Let's say i cheat and decided my application always says from start to end of my soundwave i have 1s (1s is enough for a 'I love you' for exemple)

Ok so i have my length total so with open cv i can check my image and reconise bar height every pixel. And then with my pixel length and the fact i know it's one second i can start to generate sound.

But how can i decided.... the corresponding value to the Heigh in pixel? I don't have frequency value correspondance. 12px heigh can be 20Hz as 20 000Hz

Ok let's say i define a value to the max height of my sound wave to the real value of my sound. Cause i use a sound i choose. So i can set a reference value and use it to get other value.

I now parse a picture to get a compressed sound and i have some value of Hz in an intervall of second.

Lets say i have a 10cm tatoo of a 1s sound. each cm is 0.1s

And in each cm i can make like... 10 bar maybe 20 (one bar is 1mm or 0.5mm possible in tatoo right?) Let say 20 ...

so i have info of Hz every 0.005s

and let say i decide i start up and and bottom i hav two info in 0.005s the up and bottom one So i have one info for 0.0025s

That make a sound at 400Hz... And... classical sound are know to be around 44 100Hz....

Will the sound i produce be at little close to the real one? Or does it will only be a little noise?

(English is not my mother tongue feel free to improve i will try my best to reformule if you didn't understand something)