Taking a sharp photo at several megapixel resolution traditionally relies on high grade lenses. In this paper, we present an approach to alleviate image degradations caused by imperfect optics. We rely on a calibration step to encode the optical aberrations in a space-variant point spread function and obtain a corrected image by non-stationary deconvolution. By including the Bayer array in our image formation model, we can perform demosaicing as part of the deconvolution.

Paper (pdf)

• Self-made 120mm lens

Full resolution: Original, Corrected

Full resolution: Original, Corrected

• Canon 50mm f/1.4

Full resolution: Original, Corrected

Full resolution: Original, Corrected, DXO

• Canon 24mm f/1.4

Full resolution: Original, Corrected