changing the ArchitectView background doesn't do the trick because there are two other views on top of it (an OpenGL ES view and a web view).
What you need to do is to implement an input plugin that simply delivers the image content of whatever image you want to have rendered as replacement of the camera image. Please refer to our simple input plugin example for more information about how to implement plugins for the Wikitude SDK.
Thanx for replaying
can you do one favor for me. can you send me an example for integrating the image for camera because i never worked on creating native plugin.
You can use the attached plugin as a starting point. You might need to update it to our latest plugin API, but it should give you a good start.