How do I replace white on a pin board with images?

[NaturalAlias]

Hello,

I have a few clips of panning across a pin board with white photo paper that I wanted to be able to replace with images.  I did this because I thought I would be able to replace the white paper with an images I wanted to and switch the images if I changed my mind.  I have attached a picture that will give an idea of  what I have done.  I pan through  this board focusing on different parts.  My  question is how do I get the images to only appear in the white paper, and how can I keep the shadows and curves of the paper showing as part of the new image.  Is there a way to do that?  Also I have to track the shots so the images stay in place as I move around the board, do I use the corner pin tool?  I am pretty new to After Effects so I would love to learn how to do this the right way.  Any help will be appreciated. 

Thanks in advanced.

Jay

[Mylenium]

do I use the corner pin tool?

Most likely yes, but depending on the camera move other techniques like genuine 3D-tracking or some mochaAE trickery may be required, especially when content goes off-screen. Impossible to tell from a static image. The rest is a non-issue. You'd simply overlay the images, so there's no requirement for any exta work other than matching the edges with some basic masking. Either way, I suggest you look up some tutorials based on the clues I provided.

Mylenium

[Kevin-Monahan]

Hi NaturalAlias,

Were you able to get this effect done yet? Did Mylenium's response help you out? Please let us know.

Thanks,
Kevin