Comparative Study of Retinal Vessel Segmentation Based on Global Thresholding Techniques

Figure 7

CLAHE combined with ISODATA thresholding technique. It shows the different segmentation results obtained through CLAHE with different filters using ISODATA thresholding technique. Images (g1), (h1), and (i1) are DRIVE database gold standards. Images (g2), (h2), and (i2) are images segmented using ISODATA threshold with Gaussian filter. Images (g3), (h3), and (i3) are images segmented using ISODATA threshold with average filter. Images (g4), (h4), and (i4) are images segmented using ISODATA threshold with adaptive filter. Images (g5), (h5), and (i5) are images segmented using ISODATA threshold with combination of average and Gaussian filters.