Comput. Biol. Med. - Establishing the macular grading grid by means of fovea centre detection using anatomical-based and visual-based features.

Tópicos

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Resumo

This paper presents a methodology for establishing the macular grading grid in digital retinal images by means of fovea centre detection. To this effect, visual and anatomical feature-based criteria are combined with the aim of exploiting the benefits of both techniques. First, acceptable fovea centre estimation is obtained by using a priori known anatomical features with respect to the optic disc and the vascular tree. Second, a type of morphological processing is employed in an attempt to improve the obtained fovea centre estimation when the fovea is detectable in the image; otherwise, it is declared indistinguishable and the first result is retained. The methodology was tested on the MESSIDOR and DIARETDB1 databases making use of a distance criterion between the obtained and the real fovea centre. Fovea centres in the brackets between the categories Excellent and Fair (fovea centres primarily accepted as valid in the literature) made up for 98.24% and 94.38% of the cases in the MESSIDOR and DIARETDB1, respectively.

Resumo Limpo

paper present methodolog establish macular grade grid digit retin imag mean fovea centr detect effect visual anatom featurebas criteria combin aim exploit benefit techniqu first accept fovea centr estim obtain use priori known anatom featur respect optic disc vascular tree second type morpholog process employ attempt improv obtain fovea centr estim fovea detect imag otherwis declar indistinguish first result retain methodolog test messidor diaretdb databas make use distanc criterion obtain real fovea centr fovea centr bracket categori excel fair fovea centr primarili accept valid literatur made case messidor diaretdb respect

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