Hi,
The Gathering the Jewels project has just published (draft) imaging
guidelines which deal with the issues you raise, ie image
parameters. The address is:
http://www.gtj.org.uk/contractors.html#guide.
(We call a web display image an "import master", because we
import them into our CMS which creates the display files
automatically. The import master represents the maximum
resolution web display file).
You will notice that we have different parameters for each type of
material we digitise. If the tables look too confusing, we have
found the folowing principles really useful:
1. Resolution (pixel dimensions) is all about detail. If you want to
show lots of detail you need more pixels;
2. Continuous tone images (photographs, paintings etc) compress
better in JPEG format;
3. Line art, flat colour and high contrast text scans compress
better in GIF or PNG format.
I hope this helps.
Leith
On 29 Apr 2002, at 11:33, Daniel Merriman wrote:
> Hi all,
>
> Currently we are looking into various image post-production options
> and I would like to know what other people are/intend doing.
>
> Ultimately most of us will deliver a large number of images via the
> web and there is simply no getting away from the need to download
> large amounts of image data (OCR conversion for some images is being
> considered).
>
> We have decided to offer a wide range of different image sizes to suit
> all users needs and capabilities and I was wondering what exact image
> parameters have been chosen for other projects. (e.g. 300x300 pixel
> JPEG, max size of 20K etc etc) If you have many sizes of image, please
> list them all if possible.
>
> It is obviously a question of balance. Hopefully by consulting with
> other projects I will be able to uncover some sort of consensus.
>
> Best regards
>
> Daniel Merriman - Project Manager
>
> From Weaver to Web Project
> Calderdale MBC
> Reference Library
> Northgate House
> Halifax
> HX1 1UN
>
> 01422 392632
>
> *** SCANNED FOR VIRUSES ***
>
___________________________________________________
Leith Haarhoff
Digitisation Manager / Rheolwr Digideiddio
Gathering the Jewels / Casglu'r Tlyusau
Funded by the New Opportunities Fund. Noddwyd gan Y Gronfa Cyfleoedd Newydd
[log in to unmask]
___________________________________________________
Deddf Gwarchod Data 1998 / Data Protection Act 1998
Mae'r Llyfrgell yn cadw gwybodaeth bersonol at bwrpasau gweinyddol. Ni
ddatgelir y manylion i unrhyw sefydliad anawdurdodedig, ac fe'u cedwir
am gyfnod rhesymol o amser. Am fwy o fanylion, cysylltwch รข'r Swyddog
Gwarchod Data yn y cyfeiriad uchod, neu, gweler gwefan y Llyfrgell,
http://www.llgc.org.uk/gwyb/dpa/index_c.htm
The Library holds personal data for administrative purposes. This
information will not be disclosed to any unauthorised organisation, and
will be retained for a reasonable period of time. For further
information, please visit the Library's website at
http://www.llgc.org.uk/gwyb/dpa/index_s.htm or contact the Data
Protection Officer at the above address.
|
