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paulomaia20 avatar paulomaia20 commented on July 18, 2024

Primeiras ideias:

  • Artérias são mais brilhantes que as veias (devido ao O2)

  • Artérias são mais finas que as veias vizinhas (temos de ter em conta as que são do mesmo calibre)

  • Há uma caracteristica muito importante que na literatura: considera que o reflexo central é mais amplo nas artérias (usa-se o red channel). Isto equivale ao lumen das arterias que é mais claro que os das veias

  • As veias e as arterias normalmente são alternadas perto do disco otico depois de identificar é seguir a "estrada e bifurcações"
    Nós pensamos que podiamos encontrar uma relação (o codigo tem de ser adaptavel para cada imagem) entre veias e arterias com isto, o que quero dizer é uma razão entre veias e arterias num raio proximo do disco otico

  • Distinguir ramificações e cruzamentos
    [1][2]

  • Vessel labeling is a very difficult task due to the small differences between veins and arteries, that decrease with the vessel size, and the intra and inter-image variability, that hinder the vessel color characterization. [3]

Referências:

  1. KnowledgeBasedImageEnhancementUsingNeuralNetworks_nieuwenhuis2006
  2. BloodVesselClassificationintoArterisandVeinsinRetinalImages_nieuwenhuis-et-al-spie07
  3. On the Automatic Computation of the Arterio-Venous Ratio in Retinal Images:
    Using Minimal Paths for the Artery/Vein Classification

from avclf_daco2017.

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