My application includes multiple dynamic elements, such as rotating banners or live data feeds, that change frequently. However, there is a specific section of the UI that remains relatively static, and I want to focus my visual testing on that region alone. How can I use Imagium to isolate that particular area for visual comparisons while ignoring changes in the rest of the page? Additionally, are there any best practices or recommended approaches within Imagium to avoid false positives caused by the dynamic regions elsewhere in the application?