Many modern image formats (like TIFF or JPEG) contain metadata fields that tell viewing software how to orient the image. By altering the Orientation tag via a tool like ExifTool you can tell programs to mirror or rotate the origin point without re-encoding the actual pixels.

During the Interactive Raster attachment process, it would be good to have an option that rotates the origin to match the Model Origin to bottom left, or whichever is needed in order to align the raster without the need to move it.