Retrospective Illumination Correction of Retinal Images

Figure 8

(a) Artificially introduced illumination field. Error illumination field (illumination and restoration field multiplied, ideally black) using: (b) Amoeba optimizer, (c) Powel optimizer, (d) CRS, (e) LBFGS optimizer, (f) Gradient descent optimizer (g) Conjugate gradient optimizer.

(a)

(b)

(c)

(d)

(e)

(f)

(g)