An Automatic Cognitive Graph-Based Segmentation for Detection of Blood Vessels in Retinal Images

Figure 3

Illustrative comparison of enhancement effects in selected images from the DRIVE training, DRIVE testing, ARIA, and STARE images. The green channels of selected images are presented in (a). (b) shows the results of applying multiscale BTH. Results of multiscale multiorientation BTH are presented in (c). (d) shows local-phased enhancement after applying Retinex to green channels [5]. (e) shows results of applying wavelet-based enhancement results [10].

(a)

(b)

(c)

(d)

(e)