putting images on the Web that can be panned and zoomed

Mon May 21 10:22:33 EDT 2012

John,

Is it possible to scan in grayscale?  This will help legibility.

I know that grayscale will make larger files.  If that is a problem, then
still scan in grayscale, then try to do some image clean up like adjusting
levels across all files or all files with a certain set of parameters
(maybe like http://journal.code4lib.org/articles/5385 ) , then convert to
black and white or otherwise optimize.

By the way, as I'm sure you already know, digitizing microfilm results in
much poorer image quality than does digitizing paper.  If you start with a
bad image, you can only do so much.  If you start with a good image, and
then decide to loose quality by optimizing, then you have a full range of
choices in that tradeoff.  If you have the option to digitize paper, you
are probably better off putting labor or outsourcing costs into handling
paper for a clean initial scan, rather than putting labor costs into
handling and processing digital files to compensate for a poor initial
scan.  Experiment and maybe you will find you get more bang for your buck
digitizing paper.

-Wilhelmina Randtke

On Mon, May 21, 2012 at 8:52 AM, John Fitzgibbon <
jfitzgibbon at galwaylibrary.ie> wrote:

> Hi Bob,
>
> Thanks for your reply. I have put the sample online at
> http://places.galwaylibrary.ie/sample.pdf.
>
> The file is about 2.3Mb in size. It is from page 3 on that the file is
> typical of what we are trying to do. Each page will ultimately be a
> separate file.
>
> Regards
> John
>
> -----Original Message-----
> From: Web technologies in libraries [mailto:WEB4LIB at LISTSERV.ND.EDU] On
> Behalf Of Bob Rasmussen
> Sent: 21 May 2012 14:36
> To: WEB4LIB at LISTSERV.ND.EDU
> Subject: Re: [WEB4LIB] putting images on the Web that can be panned and
> zoomed
>
> John, can you provide a sample URL?
>
> On Mon, 21 May 2012, John Fitzgibbon wrote:
>
> > Hi,
> >
> > We are in the process of making very old hand written documents
> available on the Web. The handwritten information has been typed up and
> converted to HTML, but we are hoping to provide links from this to the
> originals which will be in PDF format.
> >
> > The originals are on microfilm. Each page is about six times as wide as
> it is high. We have scanned a sample, but find that when zooming in, it
> quickly becomes impossible to read the handwriting. Vertical lines which
> are on the microfilm become more of a problem when enlarging the image.
> Also, because of the document's dimensions, much of the document disappears
> off screen when zooming in, and a large scrollbar appears at the bottom of
> the screen.
> >
> > A cleaner image and an ability to pan and zoom with the mouse would be
> ideal. What is the best way of achieving this? Any help would be much
> appreciated.
> >
> > Regards
> > John
> >
> >
> >
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> Regards,
> ....Bob Rasmussen,   President,   Rasmussen Software, Inc.
>
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