PNG Export Quality
There is a huge difference in the rendering quality of JPEGs vs PNGs in InDesign.
See attached document that demonstrates the difference between the two formats, exported from the same InDesign document, using maximum quality, 72 DPI with anti-aliasing turned on.
The obvious differences are the moiré in the white top and the edges of the legs in the girl at the bottom, including the fine detail in the stitching.
It would be great if the PNG export engine could be improved.
Dylan
shared this idea
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Phillip Fischer
commented
I'm going to +1 onto this, but it's not a new thing. I found a post on StackExchange finding this occurring after CS6, back in 2015. (https://graphicdesign.stackexchange.com/questions/36566/how-do-i-get-adobe-indesign-cs6-to-export-high-quality-pngs)
I'll recap their findings, and mine agree with it:
"It occurs when a graphic containing an alpha channel ("transparency" in the case of PNG, or the existence of any layer other than "background" for PSD) is displayed in InDesign at a size other than 100% (the image, not the boundary) and/or at a DPI/PPI different to that of the document, and is exported either as a PNG or PDF. It seems it switches to a different resampling algorythm for high quality output, but messes up somewhere giving this awful jaggy nonsense."My experience mirrors their own. I've attached a screenshot comparing 2 pngs exported from InDesign. Each of them is nothing more than a placed PSD, and the only difference between the two is that the PSD has been flattened in one. The other only has 1 layer, and has no transparency, but since the only layer is not seen as a "background" layer, the file seems like it's viewed as having transparency and seems to cause the PNG to get ugly.
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Kate Finch commented
We're seeing this also and the PNG files being produced are unusable.
