On Sat, Feb 19, 2005 at 12:23:08PM +1100, David Gerard wrote:
Ray Saintonge (saintonge(a)telus.net) [050219 11:22]:
David Gerard wrote:
>An A4 page at 300dpi is 8.7 MB; at 600dpi
it's 34.8 MB. How many pages are
>there? Time to buy a 1000-stack of DVD-Rs ;-)
The 1911EB has 29 volumes, of which the last is
an index. Each volume
has about 1,000 pages. Add three volumes for the supplements, and we
have a mere 32,000 pages. David, was your estimate based on colour
scanning? Wouldn't monochrome scanning take less space? There are very
few colour pages.
Greyscale (one byte per pixel, 210 x 297 / 2.54 / 2.54 * 300 * 300 pixels).
You could probably reduce it to four bits per pixel. I wouldn't suggest
going to three. I did this last year scanning in a pile of stuff.
Why should it be kept uncompressed, or compressed by throwing away the lowest bits ?
There are pretty good algorithms for compressing text, like djvu.
Anyway, the 32000 pages in 8-bpp 600 dpi take just about 1 terabyte.
That's not much.