Artifacts when exporting to PDF?

[EZ_BC]

I have a PNG logo that looks nice and sharp. When I add it to InDesign document and export as an interactive PDF I can see artifacts, please see screenshots below. Thanks in advance for any help!

[Steve Werner]

Look in the Info panel or Links panel. What's the resoluton of the PNG? That's a raster image, not vector.

[hammer0909]

Because it's a .png, it's a pixel-based graphic as Steve has pointed out. It's a simple graphic and therefore would be easy to recreate as vector and most definitely would resolve the problem. You're probably encountering some type of resolution rounding glitch. If you want to keep it as a .png, try increasing the image resolution when exporting to interactive PDF. That might help depending on what the original resolution of the graphic is and how large you're scaling the graphic in InDesign. That could make a big difference as well.

[EZ_BC]

If I just copy and paste it from Illustrator then it converts to CMYK! http://prntscr.com/l9kfdh

[rob day]

The color change is likely because the png has transparency and your document's Transparency Blend Space is set to CMYK, change it to RGB.

On the artifact—I've seen edge artifacts like this when the image bounding box is close to or touching the art and the art gets sampled down somewhere in the workflow. Try expanding the png's cropbox or canvas so there is at least 10 pixels of padding.

[William32590036xqkg]

It was the canvas touching the art for me. Added 10 px, re-linked and exported again. Now it´s nice and crisp, without these weird counting errors (or whatever it is).

[Laubender]

Hi EZ_BC ,

with such a result I'd usually would say:

Do not resample image resolution when exporting.

But with Interactive PDF export you are not able to do this.

You cannot leave an image unchanged. Hm, that said, try JPEG 2000 with the export. This option claims it is not doing anything to the quality of a placed image exported. But then there is the resolution value. You have to give a number here and cannot export "as is".

Workaround:

Open the PDF with Acrobat Pro, edit the image to open in PhotoShop and exchange the pixels with better ones.

Regards,
Uwe