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
Is there a simple solution to trim whitespace on the image in PIL? ImageMagick has easy support for it in the following way: convert test.jpeg -fuzz 7% -trim test_trimmed.jpeg I found a solution for PIL: from PIL import Image, ImageChops def trim(im, border): bg = Image.new(im.mode, im.size, border) diff = ImageChops.difference(im, bg) bbox = diff.getbbox() … Read more
I need to use ImageMagick as PIL does not have the amount of image functionality available that I am looking for. However, I am wanting to use Python. The python bindings (PythonMagick) have not been updated since 2009. The only thing I have been able to find is os.system calls to use the command line … Read more
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
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
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
I’ve been using paperclip to upload and auto-resize photos in my Rails app, and I love it. Only problem is about every other month my crazy manager decides he wants a new size to display the photos in. So I add a new style in my Photo model and all is good for new photos, … Read more
Getting started with ImageMagic and trying to find a way to do this… If an image is less than 50 pixels tall or 50 pixels wide, I’d like to place it (un-scaled) in the horizontal/vertical center of a new 50×50 pixel canvas on top of a white background – and save that as the new … Read more
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
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
