Heyho,
i am using imagemagick 6.8. (2015-03-20) and I tried to convert a .pgm file to a .jp2 file. The output file should be smaller by the factor specified in the jp2:rate=x option, but it does not seem to work.
I am using this command
convert input.pgm -define jp2:rate=20.0 output.jp2
But the resulting file, output.jp2, is bigger than expected (Only compression rate 6 instead of the expected 20)
Could somebody explain this to me please?
The following works for ImageMagick Version 6.7.7-10 2017-07-31 Q16 http://www.imagemagick.org
convert input.pgm -define jp2:rate=0.05 #not 20.0
Related
Edit 26/04/2016 : This is a bug that has been fixed in ImageMagick-6.9.3-5 and 7.0.0-0
.
Converting DNG files, when I run
convert "my_img.dng" "my_img_converted.jpg"
Imagemagick changes the date modified of the original my_img.dng to the time when conversion happened.
.
Do you know how to avoid that and keep the original file intact?
I would say that is a bug! A workaround is as follows:
convert dng:- result.jpg < original.dng
Or, equivalently if you prefer reading left-to-right and don't mind superfluous processes:
cat original.dng | convert dng:- result.jpg
I would like to convert a PDF to BMP. The PDF I am talking about is available here.
I use ImageMagick with the following command :
convert -verbose -resize 256x256 phantom-brain-ellipse.pdf phantom.bmp
But the result is a phantom.bmp file corrupted or empty file with pixel dimensions 0x0.
The error message is :
"/opt/local/bin/gsx" -q -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000 -dAlignToPixels=0 -dGridFitTT=2 "-sDEVICE=pngalpha" -dTextAlphaBits=4 -dGraphicsAlphaBits=4 "-r72x72" "-sOutputFile=/var/tmp/magick-1199-UNts2yPB9u2%d" "-f/var/tmp/magick-1199rG26g03biUuT" "-f/var/tmp/magick-1199-sNgqMmlD53M"
/var/tmp/magick-1199-UNts2yPB9u21 PNG 263x263 263x263+0+0 8-bit sRGB 54.6KB 0.010u 0:00.009
phantom-brain-ellipse.pdf PDF 263x263 263x263+0+0 16-bit sRGB 54.6KB 0.000u 0:00.000
phantom-brain-ellipse.pdf=>phantom.bmp PDF 263x263=>256x256 256x256+0+0 16-bit sRGB 262KB 0.020u 0:00.019
When I convert to PNG everything works fine with the same command :
convert -verbose -resize 256x256 phantom-brain-ellipse.pdf phantom.png
Any idea how to fix that ?
Partial Solution
This command allowed me to get the right BMP :
convert phantom.png BMP3:phantom.bmp
But I don't get why it works !
Try:
convert -verbose -resize 256x256 phantom-brain-ellipse.pdf[0] BMP3:phantom.bmp
Update/Explanation
PDF is a multipage format. Potentially, the input PDF has more than one page.
ImageMagick commands can select a specific page with the naming convention filename[i], where i is the index of the page. Indexing is zero-based, so some.pdf[0] means: "Use page 1 of this PDF."
The SOMEFORMAT:filename convention determines the file format for output files and overrides any file format which may be indicated by the filename suffix. So an output filename of GIF:some.png will create a GIF file with the (wrong) suffix .png.
The BMP3: is a specific version of the general BMP format. By default, BMP:filename or filename.bmp will produce version 4 of BMP. To get version 3 use BMP3:filename.bmp. To get version 2 use BMP2:filename.bmp.
I used BMP3: because you reported that it worked...
I have 600 TIFF files in a directory, c:\temp.
The file names are like:
001_1.tif,
001_2.tif,
001_3.tif
002_1.tif,
002_2.tif,
002_3.tif
....
....
200_1.tif,
200_2.tif,
200_3.tif
The combined files should be placed in same directory and the files should be named like:
1_merged.tif
2_merged.tif
.....
.....
200_merged.tif
I am looking for any single command-line /batch-file to do so through ImageMagick convert/ mogrify command or any other command/tools.
Please note the overall time taken should not be more than 5 second.
Assuming you want to combine the 600 single-page TIFFs into one single multi-page TIFF (per set of 3), it is as simple as:
convert 001_*.tiff 1_merged.tiff
convert 002_*.tiff 2_merged.tiff
[....]
convert 200_*.tiff 200_merged.tiff
Please note that nobody will be able to guarantee any timing/performance benchmarks... least while we don't even have any idea how exactly your input TIFFs are constituted. (Are they 10000x10000 pixels or are they 20x20 pixels?, Are they color or grayscale?, etc.pp.)
This is different from Mark's answer, because he seems to have assumed you want to combine the input files all into a 1-page image, where the originals are tiled across a larger page...
This should do it - I will leave you to do error checking in case you haven't actually got all the images you suggest!
#ECHO OFF
setlocal EnableDelayedExpansion
FOR /L %%A IN (1,1,200) DO (
set "formattedValue=000000%%A"
set "x=!formattedValue:~-3!"
convert !x!_*.tif +append !x!_merged.tif
echo !x!
)
So, if your images look like this
001_1.tif
001_2.tif
001_3.tif
you will get this in merged_001.tif
If you change +append to -append then merged_001.tif will be like this:
If you remove +append altogether, you will get 200 multi-page TIFs with 3 pages each - same as Kurt's answer.
I use MiniMagick (A ruby wrapper for ImageMagick) with rails-4.2 (ruby 2.2.0) on a linux server.
I generate images via ttf. Each image has from 1 to 10 layers I then merged to create an image. I get an error which I can not find the solution.
MiniMagick::Error (`convert -background none -fill #000000 -font ttf/SELIS006N.ttf -pointsize 300 label: S public/pictogram_images/873-layer-2.png` failed with error:
convert.im6: invalid geometry `+3.35542e+07+300.5' # error/geometry.c/ParsePageGeometry/1407.
convert.im6: unable to clone cache `/tmp/magick-1r313oY0': No space left on device # error/cache.c/CloneDiskToDiskPixelCache/852.
convert.im6: Image width exceeds user limit in IHDR `public/pictogram_images/873-layer-2.png' # warning/png.c/MagickPNGWarningHandler/1754.
convert.im6: Invalid IHDR data `public/pictogram_images/873-layer-2.png' # error/png.c/MagickPNGErrorHandler/1728.
):
SELIS006N.ttf is my ttf files, the character is "S" and the image path is public/pictogram_images/873-layer-2.png
I test the character with the same .ttf character and it's a completely normal without particuliarity.
Part of the error you received is this line:
unable to clone cache `/tmp/magick-1r313oY0': No space left on device
It seems that the filesystem containing your /tmp directory is just full.
If this doesn't seem to actually be the case and the image you try to convert has a reasonable file size, this might also be an artefact of a corrupt source file. ImageMagick might try to expand compressed parts of the file until it runs out of space and fails.
I would like to convert a pdf file to a Black and White PDF file with ImageMagick. But I've got two problems:
I use this command:
convert -colorspace Gray D:\in.pdf D:\out.pdf
But this command convert only the FIRST page... How to convert all pages?
After use this command the resolution is terrible... but if I use -density 300 option the file size has increased more than double. So I would like to use the same DPI setting, but how to use?
Thanks a lot
Assuming you have all the necessary command line tools installed you can do the following:
Split and join PDF using pdfseparate and pdfunite (Poppler tools).
Extract the original density using pdfinfo plus grep/egrep and, for instance, sed. This will not guarantee the same size of the PDF file, just the same DPI.
Putting it all together you can have a series of bash commands as following:
pdfseparate in.pdf temp-%d.pdf; for i in $(seq $(ls -1 temp-*.pdf | wc -l)); do mv temp-$i.pdf temp-$(printf %03d $i).pdf; done
for f in temp-*.pdf; do convert -density $(pdfinfo $f | egrep -o 'Page size:[[:space:]]*[0-9]+(\.[0-9]+)?[[:space:]]*x[[:space:]]*[0-9]+(\.[0-9]+)?' | sed -e 's/^Page size:\s*//'| sed -e 's/\s*x\s*/x/') -colorspace Gray {,bw-}$f; done
pdfunite bw-temp-*.pdf out.pdf
rm {bw-,}temp-*.pdf
Note 1: there as a dirty workaround (for/wc/seq/printf) for a proper ordering of 10-999 pages PDFs (I did not figure out how to put leading zeros in pdfseparate).
Note 2: I guess ImageMagick treats PDFs as just another binary image file so for instance for mainly text files this will result in huge PDFs. Thus, this is a very bad method to convert text-based PDFs to B&W.