W. P. Cheung

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One of the major problems in computer-generated holography is the high computation cost involved for the calculation of fringe patterns. Recently, the problem has been addressed by imposing a horizontal parallax only constraint whereby the process can be simplified to the computation of one-dimensional sublines, each representing a scan plane of the object(More)
In this paper, a supervised self-organisation Neural Network (NN) for direct shape from shading is developed. The structure of the NN for the inclined light source model is derived based on the maximum uphill direct shape from shading approach. The major advantage of the NN model presented is the parallel learning or weight evolution for the direct shading.(More)
-In this paper, new direct shape from shading algorithms with improved rate of convergence for inclined and perpendicular light source are presented. The algorithms are mainly based on optimal dynamic system control with dynamic programming. Unlike the previous shading algorithms which first estimate the gradient of surface instead of depth using(More)
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