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Bear tail(dr.wallet)×sansan 合同lt会-勉強会esaki
1.
> 名刺を周波数で観る BearTail(Dr.Wallet)×Sansan -合同LT会-
2015.9.30 Sansan株式会社 オペレーション部 R&D Esaki
2.
Copyright © 2014
Sansan, Inc. All rights reserved. 1
3.
Copyright © 2014
Sansan, Inc. All rights reserved. > 名刺データ化フローの中の画像補正を担当してます。 2 ・・・・ ・・・・ 画像補正 ・・・・ ・・・・・・・・・・・・・・・・ ・・・・ ・・・・ ・・・・ ・・・・
4.
Copyright © 2014
Sansan, Inc. All rights reserved. > 画像補正って? 3 影のある名刺の影をなくしたり 見えにくい文字をくっきり見せたり ボケてる名刺を補正したり こういう画像補正をするのに大切なのが、 画像を周波数で観る眼!!
5.
Copyright © 2014
Sansan, Inc. All rights reserved. 4 画像処理エンジニアは 画像を周波数で観る。
6.
Copyright © 2014
Sansan, Inc. All rights reserved. 5 ?画像 周波数 ? ?
7.
Copyright © 2014
Sansan, Inc. All rights reserved. > 一行の輝度値をグラフにすれば波形になる 6 縦の波形横の波形
8.
Copyright © 2014
Sansan, Inc. All rights reserved. > 画像を周波数で観るためのフーリエ変換(FFT) 7 FFTは、複雑な波形を単純なsin波に分解する http://www.imv.co.jp/pr/naruhodo_vibrograph/chapter03/
9.
Copyright © 2014
Sansan, Inc. All rights reserved. > 画像の低周波と高周波 8 低周波 高周波 http://tt.sakura.ne.jp/~hiropon/lecture/jpeg.html
10.
Copyright © 2014
Sansan, Inc. All rights reserved. > これらの画像を周波数で観るとどうなるだろう? 9 ? ? ?http://www.ai.soc.i.kyoto-u.ac.jp/~inaba/ImageProc/1-6.html
11.
Copyright © 2014
Sansan, Inc. All rights reserved. > 画像をFFTしたときの見方 10 実空間 周波数空間 低周波 高周波 高周波 高周波 高周波 FFT http://www.ai.soc.i.kyoto-u.ac.jp/~inaba/ImageProc/1-6.html
12.
Copyright © 2014
Sansan, Inc. All rights reserved. > アルファベットは周波数で観るとこうなる 11 http://www.ai.soc.i.kyoto-u.ac.jp/~inaba/ImageProc/1-6.html
13.
Copyright © 2014
Sansan, Inc. All rights reserved. 12 画像処理エンジニアは 画像を周波数で観る。
14.
Copyright © 2014
Sansan, Inc. All rights reserved. > ImageJを使ってやってみました。 13 http://imagej.nih.gov/ij/ FFTの機能 波形を出す機能
15.
Copyright © 2014
Sansan, Inc. All rights reserved. 14
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