Hello,
The information is stored in CMS_MetaFile table. You should be able to get the image, if you know its GUID, by composing the URL to this format:
/CMSPages/GetMetaFile.aspx?fileguid=1b5f8c05-eaf0-4c01-913e-d1b42a2f07ec
Where you will replace the GUID with your actual GUID.
Best regards,
Juraj Ondrus