Images pixelated when published online, if the frame is scaled
Images inside scaled frames can be pixelated when published. It looks like the frame scaling is applied to the resolution i.e. a 10% scaled frame will have 10% of the desired resolution. Reproducible if 'Adjust scaling percentage' preference is set. Setting a higher export resolution in the 'Publish Online' dialogue doesn't fix it.
InDesign CC 2018, probably older versions with Publish online.
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Alan Kent
commented
Hi Uwe. Here is a screenshot I included (I thought this was embedded in the book file, but here it is as well just in case). Its basically a 1080p frame (PNG, 1920x1080) exported from Adobe Character Animator.
https://drive.google.com/open?id=1mbBN8gOjmFvZ40TzZXIwdWPUXYQTJ6-H
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Uwe Laubender
commented
Hi Alan,
I would provide the placed images as well.
Hope that an InDesign developer stops by commenting.
Then you could ask for mail address to provide the full material for testing.Best,
Uwe Laubender
( ACP ) -
Alan Kent
commented
I am experiencing a problem with scaled frames as well. Here is a sample document: https://drive.google.com/open?id=1wL_eUKQbUIRw_q17vAiqjMd6uLwn4Dzq
If you publish it online, the same image scaled to slightly different sizes looks very different in quality due to pixelization. If you select the problem image, and go to Object menu > Object Export Options. Choose EPUB and HTML and set preserve appearance to "Rasterize Container" and Resultion to "300 ppi" then it comes out nicely (see image on second page). The more an image is scaled down, it appears the greater the degree of pixelization.
If you download the PDF (from same site) it looks fine.
See also this thread: https://forums.adobe.com/message/10556487#10556487