iphone - How to detect objects from Image in iOS? -

this question exact duplicate of:

• how detect objects image processing in ios? 1 answer

i have image, on image there 3 things spoon, cup , basket. have identify when user click on image nothing happen until , unless user click on spoon, cup & basket.

if user click on spoon spoon colour become green. same cup , basket.

and have no idea how this. want hints experts , how , start?

any idea or suggestions highly welcome.

you can try out masking of views setting visible parts images of objects , set view gestures

or

make different images objects set in selected state of button , on button click change state selected

[button setselected:yes];  [button setselected:no];