Retinal Image Denoising via Bilateral Filter with a Spatial Kernel of Optimally Oriented Line Spread Function

Figure 5

Our approach can preserve the structure of bifurcated vascular when denoising the image, as shown by the comparison of denoising results with BLF on image without noise (a–d) and with noise (e–h).

(a) Binary mask of bifurcated vessel

(b) Bifurcated vessel image

(c) Result of BLF

(d) Result of our method

(e) Binary mask of bifurcated vessel

(f) Noisy bifurcated vessel image

(g) Result of BLF

(h) Result of our method