Re: Browser-friendly text image compression
- From: Lars Aronsson <lars@[redacted]>
- Subject: Re: Browser-friendly text image compression
- Date: Fri, 31 Aug 2001 00:39:05 +0200
Doug Cooper wrote:
> For some reason I'm having trouble tracking down a
> bi-level image compression format that:
>
> -- performs at Fax 4 or better,
> -- is either lossy _or_ non-lossy (but isn't jpeg).
> -- can be decompressed by typical browers.
>
> Anybody out there using JBIG or JBIG2, or a tiff/Fax4
> decompression plug-in?
This is 2001. The "Making of America" project at the University of
Michigan in Ann Arbor solved all of this four years ago. Use their
solution. It works great and its free. In brief:
- Scan and store in 600 dpi TIFF G4. This is good enough for
printing, if need be.
- Have your webserver to scale down and convert images to grayscale
GIF on demand, to any integral fraction of the size, e.g. 150 dpi.
If you really hate GIF, you could pay someone to rewrite the MoA
tif2gif program to use PNG instead.
If you cannot use this, you probably need a pretty good reason.
--
Lars Aronsson (lars@[redacted]
Aronsson Datateknik
Teknikringen 1e, SE-583 30 Linkoping, Sweden
tel +46-70-7891609
http://aronsson.se