Morphing of 2-D models by Fresnel transform

A new morphing technique is proposed, where two two-dimensional (2-D) models are Fresnel-transformed and intensities of the transformed patterns are superposed and clipped, resulting in a blending pattern of two models. Since the Fresnel transform depends upon the distance parameter between the model and the Fresnel-transformed planes, the morphing process from one model to another is observed by changing the distance parameter. The morphing experiment was conducted using 2-D models, such as letters and simple figures by performing Fresnel transforms with 32/spl times/32 sampling points. Discussion is done by comparing the proposed morphing technique with a morphing technique using Fourier transform, where model spectra are superposed in the spectrum plane using a weighting factor to blend the spectra of both models proportional to the weighting factor, whereas phase functions are multiplied on the Fourier transforms of models in the Fresnel transform method.