Research Article

Automatic Detection of Hard Exudates in Color Retinal Images Using Dynamic Threshold and SVM Classification: Algorithm Development and Evaluation

Figure 4

Examples of retinal blood vessels extraction on two retinal images with different illumination conditions. (a)+(d) Green channel images after CLAHE. (b)+(e) Mean filtering of (a) and (d) respectively. (c)+(f) Extracted retinal blood vessels.
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