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画像解析(MNIST)
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asagiman
September 28, 2019
Programming
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画像解析(MNIST)
第9回もくもく会資料
asagiman
September 28, 2019
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Transcript
Έ͜ ͘͘ձ ./*45 ϓϨθϯλʔɹTomohiro Iida
ΞδΣϯμ ࣗݾհˍຊͷΰʔϧઆ໌ʢʣ ࢀՃऀͦΕͧΕͷࣗݾհʢʣ ./*45ϋϯζΦϯʢʣ
ΞδΣϯμ ࣗݾհˍຊͷΰʔϧઆ໌ʢʣ ࢀՃऀͦΕͧΕͷࣗݾհʢʣ ./*45ϋϯζΦϯʢʣ
ܦྺ
ຊͷΰʔϧ ࣗͷखॻ͖ࣈΛ ผ͢ΔϞσϧΛ࡞Δ
ࢯ໊ʢϋϯυϧωʔϜՄʣ झຯ ʮ͜ΜͳJQIPOFݏͩʂʯΛڭ͍͑ͯͩ͘͞ ࢀՃऀࣗݾհ
ࣗݾհˍຊͷΰʔϧઆ໌ʢʣ ࢀՃऀͦΕͧΕͷࣗݾհʢʣ ./*45ϋϯζΦϯʢʣ
./*45ͱ ./*45ͱɺը૾σʔληοτͷ͜ͱɻ ʢखॻ͖ࣈը૾ ຕͱɺςετը૾ ຕΛूΊͨͷʣ ҎԼ͕ϖΞʹͳ͍ͬͯΔɻ खॻ͖ͷʙͷࣈ͕ॻ͔Εͨը૾σʔλͱɺ ͦͷը૾ʹॻ͔Ε࣮ͨࡍͷࣈσʔλ
ը૾ೝࣝͱ IUUQTTVQFSTNBTICSPTGBOEPNDPNKBXJLJ&""&#&"' ը૾ೝࣝͱ ը૾σʔλ͔Βɺਓؒʹͱͬͯҙຯͷ͋ΔใΛ நग़͢ΔλεΫͷ͜ͱΛ͍͏ɻ ୯ͳΔࣈʹ͗͢ͳ͍
./*45ͱ IUUQTXFCMBCPPTDBTJFSSBOFUQZUIPOLFSBTNOJTUTBNQMFIUNM σʔλͷ༷ࢠ
./*45ͱ IUUQTXFCMBCPPTDBTJFSSBOFUQZUIPOLFSBTNOJTUTBNQMFIUNM ग़ྗ͜Μͳײ͡ ࣈ ֬ 0 0.014 1 0.001 2
0.013 3 0.719 4 0.034 5 0.016 6 0.023 7 0.065 8 0.086 9 0.029
ͰɺͬͯΈ·͠ΐ͏ ࣮
4FRVFOUJBMϞσϧ IUUQNBSVQFLFDPN*,%"%7@%-@/P@,FSBTIUNM %FOTF
3FMVؔ ೖྗ͕ҎԼͳΒɺҎ্ͳΒͦͷ··ग़ྗ͢Δؔͷ͜ͱɻ ҎԼͷࣜͰදͤΔɻ I Y \Y Y Y ^
IUUQTUFDICMPHHNPBQKQ&"'&"#&"%"&#'&&"&#$&&"&#$&#&#&#&"&#%#'&'&$&#&'#"&$"$&"&""
%SPQPVU σʔλ͕มʹͳͬͯ͠·͏͜ͱΛ͙ɻ IUUQTRJJUBDPNNJOFJUFNTECBCCFGD
3.4QSPQ lޯ߱Լ๏zΛ ࠷దԽ͢ΔΞϧΰϦζϜͷͻͱͭ దԠతֶशͷํࣜͷ࣮ݱ
ޯ߱Լ๏ ޯ߱Լ๏ͷߟ͑ํ˰্͔ΒϘʔϧΛམͱ͠Ұ൪͍ͱ͜Ζ୧Γண͘·Ͱͭ IUUQXXXQMBODWUJUFDIBDKQGVLVEBMBCCBDCEEBCDCBGDDGDQEG
ޯ߱Լ๏ ࣌ࠁͰ ʹ͋ͬͨϘʔϧΛޯͷٯํಈ͔͢ࡍͷϧʔϧ (+1) = () + ∆() , ∆()
= − (4.9) lͱॱ࣍܁Γฦ͢͜ͱͰɼޡࠩؔάϥϑͷఈ߱Γ͍ͯ͘ ˎ̍εςοϓͷҠಈڑ∆ lֶशzͰܾఆ͞ΕΔ IUUQXXXQMBODWUJUFDIBDKQGVLVEBMBCCBDCEEBCDCBGDDGDQEG
ޯ߱Լ๏ ֶशͷऔΓํτϥΠΞϯυΤϥʔʹجͮ͘ w ֶश͕େ͖͍ ˰ࠁΈ͕ߥ͗ͯ͢ޡࠩؔͷܗঢ়Λଊ͑ΒΕͣɼऩଋ͠ͳ͍ w ֶश͕খ͍͞ ˰ֶश͕Ұʹਐߦ͠ͳ͍ IUUQXXXQMBODWUJUFDIBDKQGVLVEBMBCCBDCEEBCDCBGDDGDQEG
$//ͱ ը૾σʔλʹదͨ͠ܗͷ χϡʔϥϧωοτϫʔΫ ը૾Λͦͷ··ͷܗʹ̎࣍ݩͰ ѻ͏͜ͱ͕Ͱ͖Δ $POWPMVUJPOBM/FVSBM/FUXPSL
$//ͷશମ૾ $//ɺΈࠐΈϓʔϦϯάʹΑͬͯಘΒΕͨಛϚοϓͷ֤ϐΫηϧσʔλΛɺ χϡʔϥϧωοτϫʔΫͷೖྗͱͯ͠ར༻͢Δɻ IUUQTXXXBUNBSLJUDPKQBJUBSUJDMFTOFXTIUNM
$// ΈࠐΈ IUUQTULFOHPHJUIVCJPCMPHVOEFSTUBOEJOHDPOWPMVUJPOBMOFVSBMOFUXPSLTGPSOMQ
Χʔωϧ ʢϑΟϧλʔʣ
$// ϓʔϦϯά IUUQTULFOHPHJUIVCJPCMPHVOEFSTUBOEJOHDPOWPMVUJPOBMOFVSBMOFUXPSLTGPSOMQ ը૾αΠζΛܾΊΒΕͨϧʔϧʹैͬͯখ͘͢͞Δ NBYϓʔϦϯά
$// શ݁߹ ग़ྗͷܗΛ̍࣍ݩʹมܗ͢Δ ௨ৗͷχϡʔϥϧωοτϫʔΫͱಉ͡ ʮӅΕʯʮग़ྗʯʹଓ͠ɺ
͓͠·͍ pO