[magick-users] shrinking huge blureprint images

[RobBellJr at aol.com]

Hi Carl,
 
Although the filters are not discussed on this page you may find the  
comparison of results helpful:
 
http://www.dylanbeattie.net/magick/filters/result.html
 
There are others who subscribe to this list who are more knowledgeable  but 
if your only goal is to reduce file size so you are better able to work  with 
them I believe you'll need to dice them up then edit each piece  independently. 
 Depending on how you intend to present or share the results  of your work 
you may or may want/need to stitch the results together  again.
 
Rob
 
In a message dated 1/9/2008 4:10:53 A.M. Central Standard Time,  
carl at personnelware.com writes:

I have a  bunch of .pbm files that are scans of blueprints.  the scans are 
big -  
they create 1.4gig temp file when I work with them.  so I want to  shrink 
them, 
but I keep 'loosing detail' like whole walls.

I think  the problem is the thin black lines - if there is any trace of a 
line, I  
need there to be a line in the output.

I see this list of resize  filters:

Point
Box
Triangle
Hermite
Hanning
Hamming
Blackman
Gaussian
Quadratic
Cubic
Catrom
Mitchell
Lanczos
Bessel
Sinc

Which one should I use?

and/or, where can I find a  description of them?

Carl K









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