Interpretation of the Color of Retinal Images

Color images are becoming increasingly important for the diagnosis of diabetic retinopathy; their acquisition is cheap, noninvasive, and easy to perform. It is only in the last decade that they have become—due to considerable technical improvement of their acquisition—really important for the diagnosis of this disease. Before, fluorescein angiographies have been used for years. Although the latter ones still allow detection of microaneurysms—the lesion characteristic to diabetic retinopathy—with a greater sensitivity, they are invasive and costly and therefore not adapted for screening purposes.

In this section, we discuss the color content of fundus images, and we deduce a color representation which is adapted for automatic treatment.

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