Figure 2From: Automated drusen detection in retinal images using analytical modelling algorithms Non-uniform illumination correction examples. This figure shows one healthy eye retina image (a1) and an image of an eye containing large drusen spots (b1). The illumination patterns (a2 and b2) were estimated using smoothing splines. The illumination non-uniformity was corrected, dividing the original images by their illumination pattern (a3 and b3).Back to article page