Wavelet based adaptive interpolation for volume rendering

The authors present a method for adaptive interpolation, to be used with any volume rendering algorithm, which provides high image quality while diminishing considerably the computation time. The method uses the projection details of the wavelet transform of the sampled data to obtain a local estimate of the spectral content of the data. Whenever the function (sampled data) approximates a polynomial of order less than or equal to the moments of the wavelet, the details are zero or near zero. This property is wed to identify constant, linear and non-linear zones within the data in order to choose the appropriate interpolation filter during rendering time.