i have a project similar to what iphone scanner apps do (docscanner, scannerpro, etc). but i'm new to opencv and objective-c. the app is supposed to detect and remove the edges/background of a document/paper taken a photo of using an iphone.
i've seen this DETECT the Edge of a Document in iPhoneSDK which is what i want to do. i've seen what canny does but all it shows are edges of all shapes in the image, not the paper i want to separate.
i think this is what i'm supposed to do: OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection but i can't make it work in xcode.
and i don't know how to do it (being a newbie). i've looked hard everywhere and couldn't find a way to detect edges of a document and crop them from the image. or maybe i found something but i didn't understand. i'm supposed to code it in xcode and objective-c.