CODEWITHSUNDEEP
pdfimage-processingpngghostscript
yadutaf
yadutaf

Reputation: 7132

How do i get rid of the margins ghostscripts adds?

I want to extract the first page of a PDF as PNG to do some image processing on it with this command:

$ gs -q -dNOPAUSE -dBATCH -dEPSCrop -sDEVICE=pngalpha -dLastPage=1 -sOutputFile='test.png' 'test2.pdf'

It works well for most PDFs but it adds a transparent margin on this one: http://ubuntuone.com/23676W4TJPyX6W2pkp5guG

Gimp does it as expected (no margin), convert has the same issue, -sDEVICE=jpeg also.

Is there any way to avoid it ?

Upvotes: 2

Views: 2434

Answers (2)

KenS
KenS

Reputation: 31139

Ghostscript doesn't add margins, and it certainly doesn't add transparent ones. THe problem is not with Ghostscript, its with your PDF file. You file contains:

/MediaBox [0 0 595 842] /CropBox [27.5 61.0 567.5 781.0]

Ghostscript uses the MediaBox, other viewers may or may not use the CropBox. If you read the GS documentation you will find the -dUseCropBox switch which directs GS to use the CropBox of a PDF file instead of the MediaBox when setting the media size.

-dEPSCrop isn't going to do anything at all with a PDF file.

Upvotes: 5

yadutaf
yadutaf

Reputation: 7132

For the record, If anyone runs into the same issue, I just found the proper switch: -dUseCropBox. The final command is now:

$ gs -q  -dUseCropBox -dNOPAUSE -dBATCH -sDEVICE=pngalpha -dLastPage=1 -sOutputFile='test.png' 'test2.pdf'

Upvotes: 2

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