Although Readiris is a text recognition application, it can also save documents as image files.
The following image file formats are supported as output: TIFF, PNG and JPEG.
Ctrl-click a Graphic zone in your documents, and select Copy as Graphic.
This command copies the image to the Clipboard.
The image can now be pasted into another application.

Or drag a thumbnail from the Pages panel or Thumbnail view to the Desktop to save the entire page as JPEG image.