Dynamic Range Enhancement in Digital Camera Acquisition of Prostheses Hip Xrays

The typical radiographic film exhibits a dynamic range of some 75dB. The digital capture of such radiography with a consumer-grade digital still camera significantly decreases the dynamic range to some 48dB. We propose a method that boosts the dynamic range, by the combining a set of digital images of the same Xray, acquired under different exposure values. The fusion of the acquired images is performed according to a weighting scheme derived from the confidence information extracted from an experimentally derived digital still camera response function. The resulting image can be obtained at various high dynamic range values and shows improved feature visibility.