Are images uploaded? If so, are they in the Local folder?
If so, you can build a BitmapImage from a path like this
var m_Image = new BitmapImage(new Uri("ms-appdata:///local/" + ImageFileName));
EDIT
If your file is stored in a package as “never had access and cannot load anything” in standby mode, Uri will be something like
var m_Image = new BitmapImage(new Uri("ms-appx:///Assets/" + FallBackImageFileName));
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