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Takeru Chuganji
September 28, 2016
Technology
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potatotips 27
Takeru Chuganji
September 28, 2016
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Transcript
WebP͏࣌Ε!?! ৽͍͠ը૾ܗࣜ”BPG”Λࢼͯ͠Έͨ
None
Better Portable Graphics • ༰ྔ͕খׂ͍͞ʹߴ࣭ • ՄٯѹॖϞʔυαϙʔτ • ϒϥβ൛ެ͕ࣜαϙʔτʢJSೖΕΔ͚ͩʣ •
ΞχϝʔγϣϯΛαϙʔτ
— Gigazine “JPEGը૾ͷͷϑΝΠϧαΠζͰ ಉ࣭ͷͷΛදࣔͰ͖Δը૾ܗࣜ”
BPG vs PNG / JPEG / WebP http://xooyoozoo.github.io/yolo-octo-bugfixes/
ҹ • ϒϩοΫϊΠζཱ͕ͨͳ͍ʢΒ͔ʹͳΔʣ • αΠζ͕খ͘͞ͳ࣭͕ͬͯམͪʹ͍͘ • …͍͢͝🎉
$ brew install libbpg Τϯίʔμ / σίʔμΛΠϯετʔϧ
$ bpgenc infile.[jpg|png] BPGͷม
$ bpgdec infile.bpg BPG͔Βͷม
iOSͰͷσίʔυ ϥΠϒϥϦ࡞Γ·ͨ͠🚀
https://github.com/chuganzy/HCImage-BPG
HCImage+BPG • macOS / iOSΛαϙʔτ • Carthage / CocoaPodsͰಋೖՄೳ •
Ξχϝʔγϣϯαϙʔτ
HCImage+BPG
WebPͱσίʔυ࣌ؒͷൺֱ💥
None
BPG 1136 × 818 | 13.6KB
WebP 1136 × 818 | 13.3KB
σίʔυ࣌ؒൺֱ • WebP: 0.7226 / BPG: 2.8070͋ • σίʔυ͍😂 •
നঢ়͢ΔͱΤϯίʔυ͍
͍͍ͯΔͱ͜Ζ • ճઢ͕ͱʹ͔͍͘ • ͖Ε͍ͳը૾Λද͍ࣔͨ͠ • σίʔυΛසൟʹ͠ͳͯ͘Α͍
࠾༻ࣄྫ
…ݟ͔ͭΒͳ͔ͬͨ😢 ͬͯΔΞϓϦ͋Δͷ͔ʁ
“Some of the HEVC algorithms may be protected by patents
in some countries.” BPG͕HEVCͷಛڐΛ༻͍ͯ͠ΔՄೳੑ͕͋Γ ར༻͢Δͱ͖৭ʑؾΛ͚ͭͳ͍ͱ͍͚ͳ͍
— LWN.net “ٕज़తʹJPEGΑΓ༏Ε͍ͯΔ͕ JPEGͷΘΓʹͳΔՄೳੑ͍ͩΖ͏”
😩
• BPGؒҧ͍ͳ͘ૉΒ͍͠ϑΥʔϚοτ🚀 • iOSͰ؆୯ʹ͑ΔΑ͏ʹͨ͠🙋 • ͬͯΈ͚ͨͲσίʔυ݁ߏ͍😂 • ಛڐؔʹؾΛ͚ͭΔඞཁ͕͋Δ🙄 • ࣮ઓೖʹ·ͩ৭ʑͱૣ͗͢Δ͔💧
·ͱΊ