A user captures an image of a magazine or catalog page with a smartphone. The page is identified by extracting fingerprint or watermark data from the imagery. Other imagery depicting that page is identified, and is displayed to the user on the smartphone screen. Further imagery can also be presented on the screen. This further imagery can include other pages in the publication that are not be consecutive with the captured page, but that are logically linked with it by reference to a data structure. The user may elect to post such imagery to a social network account (e.g., Pinterest) associated with the user. The posting can include an attribution identifying the original publication. A great variety of other features and arrangements are also detailed.