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An Improved Method of Pre-Deblurring Digital Images Towards the Pre-Compensation of Refractive Errors

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Abstract:
 
"An Improved Method of Pre-Deblurring Digital Images Towards the Pre-Compensation of Refractive Errors", (2004)
Miguel Alonso Jr. and Armando Barreto

ABSTRACT: Current technology in optics makes it possible to compensate for some common visual limitations (up to second order visual impairments) through spectacles or contact lenses. Current wavefront sensing techniques provide a model of these visual limitations through the Point Spread Function (PSF) of the eye. This model could be used to pre-compensate the images displayed on computer screens to counter the distortion in the user's eye. Furthermore, this correction can be applied to visual limitations for which current optical techniques are inappropriate, such as keratoconus, or other high-order visual limitations. This paper outlines a mechanism for such pre-compensation, and shows results obtained using the PSF of a -6.0D defocus to simulate an eye with severe visual limitations. Additionally, the approach is improved by a novel edge-masked contrast enhancement method to redress the contrast loss introduced by the -6.0D lens.