Extracting devicen image in PDF

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Does anybody here ever had to fight to properly extract images from PDF documents that are encoded with either DeviceN or Separation scheme ?

I mainly program with C# and VB.NET, but also know C++, and C.

Any help, anybody ?
(Thanks in advance...)

What I have tried:

iTextSharp doesn't seem to have support with the DeviceN images.

I programmed functions type 0, 2, 3 and 4 - up to postscript level 3 language subset - but the image I get are somehow granulated, or with noisy colors...
I did extract separation parameters, but don't know what to do with it.

Posted 9-Jul-16 21:24pm

chrisflo2705

Updated 10-Jul-16 3:35am

v3

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Kornfeld Eliyahu Peter 10-Jul-16 4:23am

As much as I know iTextSharp has no problem with DeviecN images, so it should be better to share your code, someone may spot the problem...
(a bit of background reading about DeviceN: https://partners.adobe.com/public/developer/en/ps/sdk/TN5604.DeviceN_Color.pdf)

chrisflo2705 10-Jul-16 9:41am

Thank you for your answer, but I have to avoid any inclusion of iTextSharp code actually, as my software has commercial purpose, and purchasing a distribution license is way too expensive for my small business.

Kornfeld Eliyahu Peter 10-Jul-16 9:41am

If you have to write it yourself, you have to learn how it works first...See the link...

chrisflo2705 10-Jul-16 9:49am

I already read that document, and my current software is based on it. I have to refine my question: I still do not understand what to do with the Separation and NChannel parameters... did anybody understood yet? (My motherlanguage is not English, in fact)

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