I need help - I can help - Unwanted lines in a document

Unwanted lines in a document

Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=3447
Printed Date: 29 Apr 24 at 3:27AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: Unwanted lines in a document

Posted By: Honza
Subject: Unwanted lines in a document
Date Posted: 27 Mar 17 at 3:41PM

Hi,

I have a problem with some pdf documents. When I try to print it from adobe acrobat or any other pdf tool thenit looks OK. When I print it using debenu library I see 1 pixel lines over the document.

Does anyone have an idea where the problem could be? The original pdf and the printed output are attached lower. The link should be valid for 7 days.

Attachment: http://d.pr/f/i3LL" rel="nofollow - http://d.pr/f/i3LL

Thanks!

Replies:

Posted By: Ingo
Date Posted: 27 Mar 17 at 6:01PM

Hi Honza,

i'm not able to download and check the pdf :(

My browser told me after clicking on "download" that the website isn't available.

Cheers and welcome here,

Ingo

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Cheers,
Ingo

Posted By: Honza
Date Posted: 28 Mar 17 at 8:29AM

Hi Ingo,

that's weird :(. Please try the link below.

http://www.dropbox.com/s/obor6i2psljay8l/LinesInDocument.zip?dl=0" rel="nofollow - http://www.dropbox.com/s/obor6i2psljay8l/LinesInDocument.zip?dl=0

Thanks

Posted By: Honza
Date Posted: 24 Apr 17 at 9:20AM

Hello Ingo,

have you tried the pdf I sent you? The dropbox link should be functional. Alternatively, I can send the pdf to an email. We need to print this pdfs without lines. Unfortunately, such pdfs account for 15% of print data.

Many thanks

Honza

Posted By: Ingo
Date Posted: 24 Apr 17 at 8:12PM

Hi Honza,

with version 12.11 and PrintDocument i've made the same experiences.

1-2 weeks further i'm able to test with 13.12 - perhaps that version has always a correction regarding this issue.

It'll be an issue from creation.

The more than 100-mb-installation of an adobe product can repair these issues on the fly but the slim line installation of QuickPDF not.

Perhpas you should upload this file with a issue-description on the support page...

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Cheers,
Ingo

Posted By: tfrost
Date Posted: 25 Apr 17 at 6:17PM

I downloaded your document and found some single-pixel-wide artefacts in the black areas when rendered. However they only appear when I dither the rendered colour original BMP to monochrome (not with QPDF) and only with some dithering algorithms, so I do not know if they correspond to what you see.

I would suggest that you try rendering with the PDFium option. See the documentation for SelectRenderer in the reference manual, and reference the DLL where it is installed in the Rendering and Printing Add On folder under the QPDF installation.

Also if you render to BMP and examine that, instead of printing, you may discover that the problem arises in your printer driver, not in the QPDF library, despite the fact that it does not occur when printing from another application.