Page 1 of 1
Having a problem scaling TIFF
Posted: 2007-03-08T11:32:29-07:00
by timthetortoise
All I need to do is scale a (quite large) TIFF. It completes, but when I try to view it, it fails. I can successfully scale and convert to JPEG, but no luck to TIFF from TIFF or to TIFF from JPEG. Any help would be appreciated. Here's my output:
Code: Select all
foobar# convert -monitor -verbose -scale 600 -colors 256 test2drw.tif ../resized/output.tif
TIFF Directory at offset 0x5048a
Subfile Type: multi-page document (2 = 0x2)
Image Width: 12000 Image Length: 16800
Resolution: 400, 400 pixels/inch
Bits/Sample: 1
Compression Scheme: CCITT Group 4
Photometric Interpretation: min-is-white
Orientation: row 0 top, col 0 lhs
Samples/Pixel: 1
Rows/Strip: 5
Planar Configuration: single image plane
Page Number: 0-0
Software: PlotWorks
Load image: 100%
test2drw.tif TIFF 12000x16800 12000x16800+0+0 DirectClass 1-bit 347.615kb 3.789u 3:10
Classify image colors: 100%
Dither image colors: 100%
Compute image colors... : 100%
Save image: 100%
TIFF Directory at offset 0x0
Image Width: 600 Image Length: 840
Resolution: 400, 400 pixels/inch
Bits/Sample: 16
Compression Scheme: PackBits
Photometric Interpretation: min-is-black
FillOrder: msb-to-lsb
Orientation: row 0 top, col 0 lhs
Samples/Pixel: 1
Rows/Strip: 6
Planar Configuration: single image plane
Software: ImageMagick 6.3.3 03/05/07 Q16 http://www.imagemagick.org
DocumentName: ../resized/output.tif
test2drw.tif=>../resized/output.tif TIFF 12000x16800=>600x840 600x840+0+0 PseudoClass 406=>32c 16-bit 38/0.000007/0.042130db 993.979kb 12.773u 0:14
Re: Having a problem scaling TIFF
Posted: 2007-03-08T14:31:11-07:00
by timthetortoise
Temporary solution is to go TIFF to GIF to TIFF.
Re: Having a problem scaling TIFF
Posted: 2007-03-08T22:10:36-07:00
by anthony
Look in IM Examples, Common Formats TIFF
http://www.imagemagick.org/Usage/formats/#tiff
hopefully it has the options you need for the TIFF format you need.
TIFF is a BAD format -- too many posibilities, not enough standard implementations.
What works for one program, may not work for another Arrrggghhhh..
Re: Having a problem scaling TIFF
Posted: 2007-03-13T16:42:48-07:00
by timthetortoise
Ah, nothing on there really worked for me, so I wrote up a script! I was having problems with some of the converted images having a black bar through them near the end and figured it was because multiple instances were running, so I added a lock file system so they'd only run one at a time. Well, it still happened. Finally figured out that /var/tmp was running out of space so changed that around too. Whaddya know, it works great now and is actually running a bit faster! Here's my script in case anyone's interested.
Code: Select all
#!/usr/compat/linux/bin/bash
srcdir=`echo "$1" | sed 's/[a-zA-Z0-9\.\-\ \#]*\.tif$//'`
dstdir=`echo "$2" | sed 's/[a-zA-Z0-9\.\-\ \#]*\.tif$//'`
tmpdst=`echo "$2" | sed 's/.tif/.gif/'`
lockfile="/usr/home/xxx/xxx/lockfiles/lock"
export MAGICK_TMPDIR="/usr/home/xxx/xxx/imagemagicktmp"
if [ -d "$srcdir" ]; then
echo "Directory $srcdir exists"
else
echo "Directory $srcdir does not exist. Exiting"
exit 1
fi
if [ -e "$1" ]; then
echo "File $1 exists"
else
echo "File $1 does not exist. Exiting"
exit 1
fi
if [ -d "$dstdir" ]; then
echo "Directory $dstdir exists"
else
echo "Directory $dstdir does not exist, creating"
`mkdir -p $dstdir`
fi
while [ -e $lockfile ]
do
sleep 4
done
echo "Input is $1, output is $2. Medium is $tmpdst"
`touch $lockfile && /usr/local/bin/convert -monitor -verbose +dither -scale 800x600 "$1" "$tmpdst"`
if [ "$3" -ge 0 ]; then
`/usr/local/bin/mogrify -rotate $3 "$tmpdst"`
fi
`/usr/local/bin/convert +compress "$tmpdst" "$2"`
`rm "$tmpdst"`
`rm $lockfile
This is invoked from a PHP frontend. I know it's not best practice to export the tmpdir every time, but due to the server's instability it's a lot safer at this point. Plus not really any error checking... should probably fix that soon.
Many thanks to ImageMagick for making what would have taken weeks to code possible to do with a couple days of experimentation!