Probleme ale Achiziţiei Imaginilor în Iridologie

Catchlight and the four classes of Purkinje images are not the only obvious problems of iris image acquisition, that all-important step in iris image analysis. Depth of field is close to zero in iris macrophotography, even at current 1:1 magnifications. The pupil notoriously changes its diameter every moment. The iris is a continuously moving target, displaying various movements of several classes, those of the eye and those of its own – including hippus. The iris is a segment of sphere, with many layers of surface features, and not a conical surface as those familiar with geodetical projections of the Earth surface are quick to point out. Last but not least, color reproduction and color constancy are impossible, given the dual external – physical and chemical – and iternal – physiological and psychological – nature of the color generation process. On top of these considerations, are shifts and drifts in iris stromal patterns per se – stuctural, chromatic and all. Therefore, iris image acquisition and processing without specially designed cameras – and especially image understanding, with comparisons of iris patterns – are only an exercise in serendipity...