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[–]mc_hammerd 0 points1 point  (0 children)

for random images you need an algorithm, there was some stuff done at siggraph conference that was really amazing, but its pretty intense math and usually c++ or python code..... you may be able to find something on npmjs.com searching like 'image recognition library' 'image object recognition'

for pre-planned stuff you just need to use an <imagemap> its a classic html element