• P P Das

      Articles written in Sadhana

    • Digital distance geometry: A survey

      P P Das B N Chatterji

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      Digital distance geometry (ddg) is the study of distances in the geometry of digitized spaces. This was introduced approximately 25 years ago, when the study of digital geometry itself began, for providing a theoretical background to digital picture processing algorithms. In this survey we focus our attention on theddg of arbitrary dimensions and other related issues and compile an up-to-date list of references on the topic.

    • A generalized approach to the reconstruction of a restricted class of digitized planar curves

      S Chattopadhyay P P Das

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      Reconstruction of an original continuous curve and the estimation of its parameters from the digitized version of the curve is a challenging problem, as quantization always causes some loss of information. In this paper, we have developed a scheme for reconstruction which is applicable to a class of curves having at the most two parameters. The class of curves for which the scheme works has also been characterized. We have shown that for one-parameter curves the exact domain of values of the parameter can be obtained. But in the two-parameter case, only the smallest rectangle containing the domain can be realised. The distinctive feature of our scheme is that it provides a unified approach to solve the reconstruction and the domain-finding problem for a class of curves.

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