IVTC but ignoring part of the video frame from pattern search?

[Stereodude]

Is there any way to do an automated IVTC using TFM, Telecide, or similar but ignore certain pixel areas of the input video? I'm thinking of things like station logos or in frame popover advertisements / message that are interlaced content superimposed on top of telecined film based content. When the film based content has little motion and the superimposed interlaced video portion is moving around the proper fields to reconstruct the tend to be misdetected leaving interlaced fields in the output.

I'm thinking of something like being able to load an alpha mask from a .png and anything masked out is omitted from the pattern search. This would allow the logos or advertisements to be masked from the pattern search and allow the IVTC to work correctly on the underlying film content.

Is there a way to do this with any existing plugins?

Thanks!