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Fig. 3 | BMC Ophthalmology

Fig. 3

From: Semi-automated quantification of hard exudates in colour fundus photographs diagnosed with diabetic retinopathy

Fig. 3

Graphical illustration of proposed algorithm: (a) Sample CF image; (b)--(e) images obtained after performing RGB to gray scale conversion, top-hat filtering, adaptive histogram equalization and thresholding in step-1, respectively; (f)--(i) images obtained after performing green plane extraction, top-hat filtering, adaptive histogram equalization and thresholding in step-2, respectively; (j) image after combing result of step-1 and step-2; (k) removing outliers using rectangular selection box and (l) image after removing outliers

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