implement xkcd #1553

[www-rohieb-name.git] / blag / post / optimizing-xsane-s-scanned-pdfs.mdwn

diff --git a/blag/post/optimizing-xsane-s-scanned-pdfs.mdwn b/blag/post/optimizing-xsane-s-scanned-pdfs.mdwn
index e48c024..ccf9b42 100644 (file)
--- a/blag/post/optimizing-xsane-s-scanned-pdfs.mdwn
+++ b/blag/post/optimizing-xsane-s-scanned-pdfs.mdwn
@@ -23,7 +23,7 @@ First (non-optimal) solution
 --------------
 
 At first, I tried to optimize the PDF using [GhostScript][gs]. I
 --------------
 
 At first, I tried to optimize the PDF using [GhostScript][gs]. I

-[[use-ghostscript-to-convert-pdf-files|already wrote]] about how GhostScript’s
+[[already wrote|use-ghostscript-to-convert-pdf-files]] about how GhostScript’s

 `-dPDFSETTINGS` option can be used to minimize PDFs by redering the pictures to
 a smaller resolution. In fact, there are [multiple rendering modes][gs-ps-pdf]
 (`screen` for 96 dpi, `ebook` for 150 dpi, `printer` for 300 dpi,
 `-dPDFSETTINGS` option can be used to minimize PDFs by redering the pictures to
 a smaller resolution. In fact, there are [multiple rendering modes][gs-ps-pdf]
 (`screen` for 96 dpi, `ebook` for 150 dpi, `printer` for 300 dpi,


@@ -334,6 +334,13 @@ in X and Y direction, which was the resolution at which the images were scanned:
 
     $ convert image*jpg -density 200x200 document.pdf
 
 
     $ convert image*jpg -density 200x200 document.pdf
 

+*Update:* You can also use the [`-page` parameter][page] to set the page size
+directly. It takes a multitude of predefined paper formats (see link) and will
+do the pixel density calculation for you, as well as adding any neccessary
+offset if the image ratio is not quite exact:
+
+    $ convert image*jpg -page A4 document.pdf
+

 With that approach, I could reduce the size of my PDF from 250 MB with
 losslessly compressed images to 38 MB with DCT compression.
 
 With that approach, I could reduce the size of my PDF from 250 MB with
 losslessly compressed images to 38 MB with DCT compression.
 


@@ -368,5 +375,6 @@ document.
 [scan-to-pdfa]: http://blog.konradvoelkel.de/2013/03/scan-to-pdfa/ "Konrad Voelkel: Linux, OCR and PDF: Scan to PDF/A"
 [pdf-stream-objects]: http://blog.didierstevens.com/2008/05/19/pdf-stream-objects/ "Didier Stevens: PDF Stream Objects"
 [pdf-tools]: http://blog.didierstevens.com/programs/pdf-tools/ "Didier Stevens: PDF Tools"
 [scan-to-pdfa]: http://blog.konradvoelkel.de/2013/03/scan-to-pdfa/ "Konrad Voelkel: Linux, OCR and PDF: Scan to PDF/A"
 [pdf-stream-objects]: http://blog.didierstevens.com/2008/05/19/pdf-stream-objects/ "Didier Stevens: PDF Stream Objects"
 [pdf-tools]: http://blog.didierstevens.com/programs/pdf-tools/ "Didier Stevens: PDF Tools"

+[page]: http://www.imagemagick.org/script/command-line-options.php#page "ImageMagick: Command-line Options"

 
 [[!tag PDF note_to_self howto ImageMagic convert file_formats reference longpost]]
 
 [[!tag PDF note_to_self howto ImageMagic convert file_formats reference longpost]]