Blood Vessel Extraction in Color Retinal Fundus Images with Enhancement Filtering and Unsupervised Classification

Table 3

The obtained average results from STARE and DRIVE databases in ROI compared with some other methods (NA indicates “not available”).

	TPR	SPE	ACC	In ROI/whole image
STARE images
Proposed method; (Gabor + K-means)	70.86	97.07	94.37	In ROI
Proposed method; (Gabor + K-means)	68.69	98.16	95.94	In whole image
Hoover [2]	67.51	95.67	92.67	In whole image
Jiang and Mojon [14]	—	—	93.37	NA
Staal et al. [7]	—	—	95.16	In ROI
Nguyen et al. [20]	—	—	93.24	NA
Budai et al. [22]	58.00	98.20	93.86	NA
Oliveira et al. [12] (FCM)	80.49	95.92	94.46	NA
Bao et al. [24]	78.12	96.12	96.24	NA
Mapayi et al. [25]	76.26	96.57	95.10	NA
Roychowdhury et al. [26]	77.20	97.30	95.10	NA
Rani et al. [27]	74.19	97.47	95.01	NA
DRIVE images
Proposed method (Gabor + K-means)	67.79	97.86	94.00	In ROI
Proposed method (Gabor + K-means)	61.02	99.05	95.71	In whole image
Chaudhuri et al. [1]	—	—	87.73	In whole image
Xu and Luo [32]	77.60	—	93.28	In ROI
Staal et al. [7]	—	—	94.42	In ROI
Nguyen et al. [20]	—	—	94.07	NA
Budai et al. [22]	64.40	98.70	95.72	NA
Oliveira et al. [12] (FCM)	91.06	94.31	94.02	NA
Mapayi et al. [25]	73.13	97.24	95.11	NA
Roychowdhury et al. [26]	72.50	98.30	95.20	NA
Rani et al. [27]	72.60	96.86	93.70	NA
Shah et al. [28]	72.05	98.14	94.79	NA