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It's not currently possible, although it could be. The main issue is that disk images don't represent data as files and folders; they are called "block-level captures" because they capture data as individual sectors on the drive, with no direct concept of how those sectors come together to form a specific file. That's the job of the operating system when it views the entire partition. Block capture has significant advantages in terms of performance and efficiency, but it does mean that a typical restore process has to include the entire partition. File & Folder backups, by comparison, are "file-level backups", so restoring individual files and folders is quite simple there; the downside is that when a file changes, the next Diff/Inc backup has to capture that entire file again, even if you only changed a few KB of a multi-GB file; the disk image would only have to capture the additional few KB.
Theoretically though, Reflect could (I think) build support for performing a File & Folder-style restore from a disk image by simply mounting the disk image in the background and then presenting the regular F&F wizard. I actually suggested this myself a while ago to benefit my own use case. I support a Reflect installation on a file server where I want to back up its entire Data partition. Ordinarily an image backup would be the obvious choice for that scenario, but being a file server, it contains several folders that have custom and sometimes non-inheriting NTFS permissions defined on them, and if you mount an image backup and just copy/paste data back to your system, those permissions would not carry over. There are command-line tools to copy files while retaining custom permissions, but that seemed too complicated for the "If I get hit by a bus" emergency procedure documentation I was writing for this client where I couldn't assume a technical resource would be available in an emergency. So instead I've set up File & Folder backups of this entire partition just because the F&F restore wizard allows you to restore custom NTFS permissions simply by checking that checkbox. I would love to see the File & Folder restore wizard support specifying an image backup file as the source and then just prompting the user to select the partition of interest from which to restore specific data, because after that it could operate exactly as it normally does. That (or something similar) would allow me to switch to much more efficient image backups of the entire system.