I *do* think that thumbnails are useful for written material. If there's
a little drawing in the text, you can tell that from other pages. With
letters, you can distinguish between the opening and closing pages. If
nothing else, it's going to take more time to decide to provide thumbnails
for some pages and not others, so I'd tend to do everything consistantly.
The MOA2 viewer (correct me if I'm wrong, Rick) looks for a thumbnail, and
provides browsing that way.
We are providing a thumbnail, a "screen sized", twice screen sized, and
jumbo. The large ones are very large, and should almost contain a
warning!
Merrilee
On Wed, 31 Mar 1999, rdecandido wrote:
> Susan,
> I would say that whether you create a thumbnail depends on what you're
> going to use it for. Usually they're to help people choose an image to
> look at. If all the thumbs of a group look the same at 72 dpi then it
> wouldn't seem necessary to create them. If they aren't legible but
> look different enough to select among them, maybe it is.
>
> Usually we create three derivatives--one about screen size for the
> web, one thumbnail (for the above uses) and one for our Copy Services
> to generate prints from. For text pages we sometime delete the last.
> For some projects we need more. For example, for a stereographs we
> created one derivative that would fit completely on a 640 x 480 screen
> (so they could be viewed in stereo) and another that was larger and in
> which more detail could be seen. As Ogden Nash said, "Circumstances
> alter cusses."
>
> We use the master to create the derivatives because it's faster.
> Several imaging program, such as PhotoShop, let you create routines
> that can generate these files without spending the time to rescan
> them.
>
> Bob DeCandido
>
>
> ______________________________ Reply Separator _________________________________
> Subject: [MOA2-WP] Scanning questions
> Author: Susan Hamburger <sxh@psulias.psu.edu> at Internet
> Date: 3/30/99 10:26 AM
>
>
> We've finally gotten our new color scanner and computer up and running and
> started scanning the minute book yesterday. Several questions occurred to
> Larry and me that I'm throwing out to the group for "best practices"
> consensus.
>
> 1) The first thumbnail we created for a page from the minute book is
> unreadable at 72 dpi. Is there any reason to take up server space on a
> thumbnail for handwritten textual material? Couldn't we just link directly
> to the display version?
>
> 2) How many derivatives is everyone making for each image (600 dpi for
> master and then how many additional derivatives--300, 150, 75)?
>
> 3) Are you creating your derivatives from the master scanned image and
> compressing them to the smaller size or are you re-scanning at the lower
> dpi to save time?
>
> Sue
>