c# - Highlight Some Part of PDF -


this strange client's requirement. wanted highlight part of pdf. pdf contains only image, want highlight selected area of image inside pdf. know highlighting text. don't know highlighting part of pdf. please help. don't know how this.

i doing project in asp.net mvc 5(c#).

try itextsharp. there no direct method highlight image, instead can specifying co-ordinates want highlight.

please take @ following link, highlighting text ( colors ) of existing pdf using itextsharp using c#


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