Planet PDF Forum Archive

Planet PDF ForumWowsers! This is page is old, head to the LIVE Planet PDF Forum. It features more than 10 conferences, covering everything from beginner to in-depth developer and pre-press discussions. If you wish to continue... one & two archive covers 1999-2011 (160,000 pages).


New Forum | Previous | Next | (P-PDF) Developers


Topic: Re: Setting dpi attribute when adding an image to PDF
Conf: (P-PDF) Developers, Msg: 58506
From: LeonardR
Date: 5/29/2002 05:32 PM

At 09:01 PM 11/8/2001 +1100, p-pdf-developer Listmanager wrote:
>I am using the PDFLibrary to insert images (currently JPEG) into a PDF
>file, I am creating.

OK.


>When I insert an image which has a resolution other than 72dpi, I get bad
>result in the PDF file (disorted image). Is there a way to pass the dpi
>information on image creation (using PDE, of COS level methods).

You don't pass dpi - you pass the image's size (height and width
in pixels!) and bit depth, and that information is then used to determine
dpi. Unless you are changing the CTM for the image, you should always
adjust image sizes to 72dpi before placing into PDF.

So if you have an image that is 2x2 at 144 dpi - it's really 4x4
at 72dpi. AND if you want it to fit in a 3x3 area, you have to either rely
on Acrobat to scale OR you do it yourself before placement.


>Another question is, that I get a bad image also when the image I am
>inserting was resized (from original image). What information I need, for
>the image to be right.

It really sounds like you are passing potentially wrong info to
PDEImage, or that PDEImage is doing the wrong thing. I don't use PDEdit
myself - I prefer the old fashioned way of CosObj's and stream writing...


Leonard


PDF In-Depth Free Product Trials Ubiquitous PDF

Debenu Aerialist

The ultimate plug-in for Adobe Acrobat. Advanced splitting, merging, stamping, bookmarking, and link...

Download free demo

Debenu PDF Tools Pro

It's simple to use and will let you preview and edit PDF files, it's a Windows application that makes...

Download free demo

Back to the past, 15 years ago! Open Publish 2002

Looking back to 2002, it's amazing how much of the prediction became a reality. Take a read and see what you think!

September 14, 2017
Platinum Sponsor





Search Planet PDF
more searching options...
Planet PDF Newsletter
Most Popular Articles
Featured Product

Debenu PDF Aerialist

The ultimate plug-in for Adobe Acrobat. Advanced splitting, merging, stamping, bookmarking, and link control. Take Acrobat to the next level.

Features

Adding a PDF Stamp Comment

OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.