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=== Compression and optimization === A number of optimization techniques make APNG files as small as possible: [[Inter frame|Inter-frame]] optimization <ref>{{Cite web |title=Inter-frame Optimization in APNG |url=http://littlesvr.ca/apng/inter-frame.html |url-status=live |archive-url=https://web.archive.org/web/20140426100136/http://littlesvr.ca:80/apng/inter-frame.html |archive-date=2014-04-26 |access-date=2021-10-21 |website=littlesvr.ca}}</ref> utilizing [[Alpha Blend|alpha-blend]] and alpha dispose operations, smaller than the full-size subframes, dirty transparency, color type and [[Palette (computing)|color palette]] optimizations, and various compression options: [[zlib]], [[7-Zip]], [[Zopfli]].<ref>{{Cite web |title=APNG Assembler |url=https://apngasm.sourceforge.net/ |access-date=2021-10-21 |website=apngasm.sourceforge.net}}</ref>
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