PNG Metadata

user1138--- via png-mng-implement <png-mng-implement-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org> Thu, 26 Aug 2021 01:05:49 +0200 (CEST)
Newsgroups gmane.comp.graphics.png.devel
Message-ID <[email protected]>
It was suggested to me here <https://github.com/ImageMagick/ImageMagick/discussions/4114> that I contact the libpng devs regarding an issue I'm having with PNG metadata.

To summarise, I am using ImageMagick to resize png's (e.g. convert meta-test.png -resize 100x100 new.png), and I would like for the resized image to retain the metadata of the original (exif, iptc, xmp) however all metadata is always stripped from the resized image.

It was suggested this may be the behavior of libpng, so:
1. Is it the case that libpng strips all metadata from generated png images? &
2. Can this behavior be changed/set to retain the metadata of the new/resized image?

I checked libpng.org but couldn't find any information relevant to metadata.

Thanks in advance.

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