How to turn off anti-aliasing for images in PDF?

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2 total messages Started by Allan_T Tue, 20 Jul 2004 19:57

#65

Author: Allan_T
Date: Tue, 20 Jul 2004 19:57

19 lines
1342 bytes

Hi there,

I am using several high-resolution (300 dpi) image files (TIFFs and EPSs) in my SVG and I convert it to PDF at 300 dpi.

The PDF looks great, but when I zoom it to about 500%, I can see that the images have very slight anti-alising for white background - the background I have is dark, so I see very slight white at the edge of the images.

I used the commands to prepare the images in the following sequence:

1. applyClipPath
2. trim (basedOn transparency)
3. imageSize

I did these to the image in Photoshop and placed the image against a dark background and there is no slight anti-aliasing at all.

How can I turn this anti-aliasing off? Hope you can help.

Thanks!

Allan

Re: How to turn off anti-aliasing for images in PDF?

#66

Author: Bob_Emerson
Date: Tue, 20 Jul 2004 22:47

16 lines
1258 bytes

Save out the image at various steps in the processing before the convertSVGToPDF and see where the problem first occurs.

I ran a convertSVGToPDF on the simple SVG below and the red-against black edges were clean.

<?xml version="1.0" standalone="no"?>

<svg width="2in" height="2in" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">

<rect width="600" height="600" fill="black"/>

<desc>This graphic links to a solid red external image
</desc>
<image x="5" y="5" width="600px" height="600px" xlink:href="myImage.psd">

</image>
</svg>

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