Imagemagick Convert PDF to JPEG: FailedToExecuteCommand `”gswin32c.exe” / PDFDelegateFailed

I have PDFs that I need to convert to images. I have installed Imagemagick. I have a PDF named a.pdf that I can open (it is not corrupt) in the folder C:\Convert\ From the command line I am trying C:\Convert>convert a.pdf a.jpg And I am getting the error. convert.exe: FailedToExecuteCommand `”gswin32c.exe” -q -dQUIET -dSAFER -dBATCH … Read more

ImageMagick extend canvas with transparent background

convert input.png -extent 100×100 -gravity center -background white output.png If the input is 50×50 the surrounding background is white. Can I somehow set this to transparent without declaring any color within input as transparent? Answer Use this instead: convert \ input.png \ -background none \ -gravity center \ -extent 100×100 \ output.png Note well: The … Read more

How to extract frames from a GIF file preserving frame dimensions

I have the following GIF image file: I want to extract its frames (using PGM output format) using this imagemagick command: convert brocoli.gif out%05d.pgm But each frame has a different size. How can I extract its frames while preserving the original gif file size? Answer Use the -coalesce option: convert -coalesce brocoli.gif out%05d.pgm AttributionSource : … Read more

ImageMagick not authorized to convert PDF to an image

I have a program, in which I need to convert a PDF to an image using Image Magick. I do that using the subprocess package: cmd = ‘magick convert -density 300 ‘+pdfFile+'[‘+str(rangeTuple[0])+’-‘+str(rangeTuple[1])+’] -depth 8 ‘+’temp.tiff’ #WINDOWS if(os.path.isfile(‘temp.tiff’)): os.remove(‘temp.tiff’) subprocess.call(cmd,shell=True) im = Image.open(‘temp.tiff’) The error I got is: convert-im6.q16: not authorized `temp2.pdf’ @ error/constitute.c/ReadImage/412. convert-im6.q16: no … Read more

What is the difference between ImageMagick and GraphicsMagick?

I’ve found myself evaluating both of these libs. Apart from what the GraphicsMagick comparison says, I see that ImageMagick still got updates and it seems that the two are almost identical. I’m just looking to do basic image manipulation in C++ (i.e. image load, filters, display); are there any differences I should be aware of … Read more

ImageMagick / RMagick – Can’t install RMagick 2.13.1. Can’t find Magick-config

I used a script to install ImageMagick http://github.com/masterkain/ImageMagick-sl After a while, I got ImageMagick installed. Then I ran sudo gem install rmagick and got Building native extensions. This could take a while… ERROR: Error installing rmagick: ERROR: Failed to build gem native extension. .rvm/rubies/ruby-1.9.2-p0/bin/ruby extconf.rb checking for Ruby version >= 1.8.5… yes checking for gcc… … Read more