[magick-users] Problem converting large tiff pictures

[Florian Hübner]

duc.sequere.aut.de.via.decede at imagemagick.org wrote:
> The solution is to try the Q8 version of ImageMagick which uses 1/2 the memory
> or add more memory to your computer, or use another more memory efficient
> program.

With the help a co-worker I found one good and one excellent solution:

This one created a 6 GB temp file but it worked fast enough:
*************************************
time convert -resize 1000x800 <( tiff2ps /scratch/000.tiff ) 
/scratch/004.png

real    0m9.044s
user    0m7.537s
sys     0m0.670s
************************************


This solution was beyond all expectations though:
************************************
time thumbnail -h 800 -w 1000 /scratch/000.tiff /scratch/tmp.tiff ; time 
convert /scratch/tmp.tiff /scratch/011.png

real    0m0.529s
user    0m0.464s
sys     0m0.062s

real    0m0.177s
user    0m0.154s
sys     0m0.019s
************************************

0.7 seconds!
Now thats impressive...


best regards
Florian