Daphe Oram was a 20th century composer who experimented with her own method of sound synthesis back in the 1950s using images to generate tones. Lots of interesting facts here: https://en.wikipedia.org/wiki/Oramics
I did a similar sort of experiment with a Bridget Riley picture - the x-axis is time, the y-axis is frequency. I think the resulting sound compliments the painting quite well actually!
Let me know if you agree...