• Chinese Optics Letters
  • Vol. 17, Issue 4, 041703 (2019)
Zhuang Li1, Guodong Lü2, and Xiaoyi Lü3、*
Author Affiliations
  • 1School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150001, China
  • 2Xinjiang Key Laboratory of Echinococcosis, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, China
  • 3College of Information Science and Engineering, Xinjiang University, Urumqi 830046, China
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    DOI: 10.3788/COL201917.041703 Cite this Article Set citation alerts
    Zhuang Li, Guodong Lü, Xiaoyi Lü, "Improved recognition of Echinococcus granulosus protoscoleces using visual saliency and scale-invariant features," Chin. Opt. Lett. 17, 041703 (2019) Copy Citation Text show less

    Abstract

    Echinococcosis—a parasitic disease caused by Echinococcus granulosus or Echinococcus multilocularis larvae—occurs in many regions in the world. This disease can pose a serious threat to public health and thus requires a convenient and cost-effective method for early detection. So, we developed a novel method based on visual saliency and scale-invariant features that detects the tapeworm parasites. This method improves upon existing bottom-up computational saliency models by introducing a visual attention mechanism. The results indicated that the proposed method offers a higher level of both accuracy and computational efficiency when detecting Echinococcus granulosus protoscoleces, which in turn could improve early detection of echinococcosis.
    R=r(g+b)/2,G=g(r+b)/2,B=b(r+g)/2,Y=(r+g)/2|rg|/2b,(1)

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    I(c,s)=|I(c)ΘI(s)|.(2)

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    RG(c,s)=|[R(c)G(c)]Θ[G(s)R(s)]|,(3)

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    BY(c,s)=|[B(c)Y(c)]Θ[Y(s)B(s)]|.(4)

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    g(x0,y0)=exp(x022δx02-y022δy02)[cos(2πfx0)+jsin(2πfx0)],(5)

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    x0=xcosθ+ysinθ.(6)

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    O(c,s,θ)=|O(c,θ)ΘO(s,θ)|.(7)

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    I=c=24s=c+3c+4N[I(c,s)],(8)

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    C¯=c=24s=c+3c+4{N[RG(c,s)]+N[BY(c,s)]},(9)

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    O=θ{0°,45°,90°,135°}N{c=24s=c+3c+4N[O(c,s,θ)]}.(10)

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    S=[N(I)+N(C)+N(O)]/3.(11)

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    G(x,y,σ)=12πσ2e(x2+y2)/2σ2.(12)

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    L(x,y,σ)=G(x,y,σ)*I(x,y),(13)

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    D(x,y,σ)=L(x,y,kσ)L(x,y,σ).(14)

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    m(x,y)=[L(x+1,y)L(x1,y)]2+[L(x,y+1)L(x,y1)]2,(15)

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    θ(x,y)=arctan{[(L(x+1,y)L(x1,y)]/[L(x,y+1)L(x,y1)]}.(16)

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    Zhuang Li, Guodong Lü, Xiaoyi Lü, "Improved recognition of Echinococcus granulosus protoscoleces using visual saliency and scale-invariant features," Chin. Opt. Lett. 17, 041703 (2019)
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