Hi Robin,
 
                I can tell the one example under stand me.My project main purpose is house loan,car loan etc.Some customer wants to loan so in that time customer not the banks.But here not require here our product act as mediator between customer and bank.Customer comes to me asking the loan information its OK.After customer interested in loan some documents are send to me in that documents its clear or not verifying the documents where the wrong is there customer can easily identifying wrong information  that purpose using image and PDF supporting annotations.So in my project leader tell to me using HTML5 IMAGE ANNOTATION.But i don't know.Please help me
 
Thank you.......