Having a problem scaling TIFF

[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

[timthetortoise]

Temporary solution is to go TIFF to GIF to TIFF.

[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..

[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!