Ubuntu
simple-scan package

Generate PDF/A compliant documents

Bug #1640607 reported by Robert Ancell
6
This bug affects 1 person
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Simple Scan
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simple-scan (Ubuntu)
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Bug Description

[Impact]
PDF/A [1] is a standard for PDF documents to make them suitable for archiving. The PDF files that simple-scan produces are PDF compliant, but missing some optional fields that are required for PDF/A.

[Test Case]
1. Scan a document
2. Save to a PDF file
3. Check document through a PDF validator (e.g. [2])

Expected result:
The generated document is compliant with PDF/A

Observed result:
The document is not compliant.

[Regression potential]
Some risk of PDF changes making files saved from Simple Scan not viewable in a PDF reader. This seems very low as PDF/A is a very commonly used standard.

[1] https://en.wikipedia.org/wiki/PDF/A
[2] http://www.pdf-tools.com/pdf/validate-pdfa-online.aspx

Revision history for this message
Robert Ancell (robert-ancell) wrote :

I've added some more metadata into trunk that makes us more compliant. The current output from http://www.pdf-tools.com/pdf/validate-pdfa-online.aspx is:

Validating file "test.pdf" for conformance level pdfa-1a
The key StructTreeRoot is required but missing.
A device-specific color space (DeviceRGB) without an appropriate output intent is used.
The document does not conform to the requested standard.
The document contains device-specific color spaces.
The document doesn't provide appropriate logical structure information.
Done.

Revision history for this message
Washington Campos (wlcampos) wrote :

Hello Robert

Thank you very much for replying to my message, I did another search and found a command line that converts the PDF file to PDF / A, I'm sure you should have already found it, this is ghostscript, with this command line: gs -dPDFA -dBATCH -dNOPAUSE -dUseCIEColor -sProcessColorModel = DeviceCMYK -sDEVICE = pdfwrite -sPDFACompatibilityPolicy = 1 -sOutputFile = output_filename.pdf input_filename.pdf.

Again, thank you very much for the response.

Revision history for this message
Robert Ancell (robert-ancell) wrote :

Simple Scan 3.23.2 has some PDF/A improvements. The main issue remaining the the "device-specific color spaces" which I haven't worked out how to correctly mark yet..

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