I made a small web “app” using p5.js!
https://landschaft-sound.glitch.me/
When tapped, it scans the image and uses hue/brightness parameters to control parameters of a synth. It’s supposed to open max 5 synths but currently it’s broken after tapping a few times 
Source is here (it uses several frameworks and quite messy 
basically frontend/app/components/scan-component.js has the relevant p5.js and sound code)
Sound part is adapted from my previous project. I wrapped web audio API to make it “patchable” instead of using p5.sound.
Obviously there are many genious people who made something similar before, so I added some of them as reference in the page 
Nevertheless, making your own adaptation is quite fun and there’s always learning.
And shout out to Klanginseln Großharthau for the opportunity for making this happen 