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; |-;| /_|
/ \_| |/ \ |
/ \/\( |
| / |` ) |
/ \ _/ |
/--._/ \ |
`/|) | /
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.' | |
/ \ |
(_.-.__.__./ /
Grim is a simple gem for extracting (reaping) a page from a pdf and converting it to an image as well as extract the text from the page as a string. It basically gives you an easy to use api to ghostscript, imagemagick, and pdftotext specific to this use case.
You will need ghostscript, imagemagick, and xpdf installed. On the Mac (OSX) I highly recommend using Homebrew to get them installed.
$ brew install ghostscript imagemagick xpdf$ gem install grimpdf = Grim.reap("/path/to/pdf") # returns Grim::Pdf instance for pdf
count = pdf.count # returns the number of pages in the pdf
png = pdf[3].save('/path/to/image.png') # will return true if page was saved or false if not
text = pdf[3].text # returns text as a String
pdf.each do |page|
puts page.text
endWe also support using other processors (the default is whatever version of Imagemagick/Ghostscript is in your path).
# specifying one processor with specific ImageMagick and GhostScript paths
Grim.processor = Grim::ImageMagickProcessor.new({:imagemagick_path => "/path/to/convert", :ghostscript_path => "/path/to/gs"})
# multiple processors with fallback if first fails, useful if you need multiple versions of convert/gs
Grim.processor = Grim::MultiProcessor.new([
Grim::ImageMagickProcessor.new({:imagemagick_path => "/path/to/6.7/convert", :ghostscript_path => "/path/to/9.04/gs"}),
Grim::ImageMagickProcessor.new({:imagemagick_path => "/path/to/6.6/convert", :ghostscript_path => "/path/to/9.02/gs"})
])
pdf = Grim.reap('/path/to/pdf')You can even specify a Windows executable ⚡
# specifying another ghostscript executable, win64 in this example
# the ghostscript/bin folder still has to be in the PATH for this to work
Grim.processor = Grim::ImageMagickProcessor.new({:ghostscript_path => "gswin64c.exe"})
pdf = Grim.reap('/path/to/pdf')Grim::ImageMagickProcessor#save supports several options as well:
pdf = Grim.reap("/path/to/pdf")
pdf[0].save('/path/to/image.png', {
:width => 600, # defaults to 1024
:density => 72, # defaults to 300
:quality => 60, # defaults to 90
:colorspace => "CMYK", # defaults to "RGB"
:alpha => "Activate" # not used when not set
})Grim has limited logging abilities. The default logger is Grim::NullLogger but you can also set your own logger.
require "logger"
Grim.logger = Logger.new($stdout).tap { |logger| logger.progname = 'Grim' }
Grim.processor = Grim::ImageMagickProcessor.new({:ghostscript_path => "/path/to/bin/gs"})
pdf = Grim.reap("/path/to/pdf")
pdf[3].save('/path/to/image.png')
# D, [2016-06-09T22:43:07.046532 #69344] DEBUG -- grim: Running imagemagick command
# D, [2016-06-09T22:43:07.046626 #69344] DEBUG -- grim: PATH=/path/to/bin:/usr/local/bin:/usr/bin
# D, [2016-06-09T22:43:07.046787 #69344] DEBUG -- grim: convert -resize 1024 -antialias -render -quality 90 -colorspace RGB -interlace none -density 300 /path/to/pdf /path/to/image.png- @jonmagic
- @jnunemaker
- @bryckbost
- @bkeepers
- @BobaFaux
- @Rubikan
- @victormier
- @philgooch
- @adamcrown
- @fujimura
- @JamesPaden
- @fgiannattasio
See LICENSE for details.
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