ScanSnap lets you save images as either PDF or JPEG files. However, JPEG files are limited to only Color and Grayscale modes.
[How to save images as JPEG files]
Click the [Scanning] tab and set [Color mode] to either "Color" or "Gray".
Select [JPEG(*.jpg)] for [File format] in the [File option] tab in the ScanSnap setup dialog box.
When [JPEG(*.jpg)] is selected, 1 file is created per page (1 image). Multi-page files cannot be created with JPEG format.