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[Branched] - New Instance of Problem with transparent image

pahuja_rajeev
Community Beginner ,
Feb 25, 2019 Feb 25, 2019

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Hi,

I am facing same issue i.e. thin border is appearing around semi-transparent images in Adobe Reader as well as in Acrobat. Turning off AA option (i.e. "smooth images") does not help. Is there any other option, in need to look at ?

Thanks

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correct answers 1 Correct answer

Dov Isaacs
Feb 25, 2019 Feb 25, 2019

Yes, in fact I have looked at the PDF file in detail.

In the first case, you will see where the cursor located that there is only one image as shown by the Object Inspector:

2019-02-25_16-50-25.png

However, where the thin, black line is located on which I moved the cursor, there are indeed objects on top of each other:

2019-02-25_16-51-41.png

The problem is that images are measured in integral pixels and the starting positions are in floating point numbers. Round offs can easy cause these stitching artifacts. That's why we always advise against

...

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Dov Isaacs
Feb 26, 2019 Feb 26, 2019

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In Response To lrosenth

He did. We analyzed the contents. Overlapping images. See above! 

- Dov Isaacs, former Adobe Principal Scientist (April 30, 1990 - May 30, 2021)

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