Computer graphics simulation of natural mummification by desiccation,Computer Animation and Virtual Worlds

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Computer graphics simulation of natural mummification by desiccation
Computer Animation and Virtual Worlds ( IF 0.9 ) Pub Date : 2020-06-08 , DOI: 10.1002/cav.1927
Dhana Frerichs ₁ , Andrew Vidler ₁ , Christos Gatzidis ₂

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Organic bodies are subject to internal processes after death, causing significant structural, and optical changes. Mummification by desiccation leads to volume shrinkage, skin wrinkling, and discoloration. We propose a method to simulate the process of mummification by desiccation and its effects on the corpse's morphology and appearance. The mummifying body is represented by a layered model consisting of a tetrahedral mesh, representing the volume, plus a high resolution triangle surface mesh representing the skin. The finite element method is used to solve the moisture diffusion and the resulting volume deformations. Skin wrinkling is achieved using position based dynamics. In order to model a visually believable reproduction of the skin coloration changes due to mummification, a skin shading approach is used that considers moisture content, hemoglobin content, and oxygen saturation. The main focus of the work in this article is to recreate the appearance changes of mummification by desiccation, which, to the best of our knowledge, has not been attempted before in computer graphics to this level of realism. The suggested approach is able to model changes in the internal structure and the surface appearance of the body which resemble the postmortem processes of natural mummification by desiccation.

中文翻译：

干燥自然木乃伊的计算机图形模拟

有机体在死后会经历内部过程，导致显着的结构和光学变化。干燥引起的木乃伊化会导致体积缩小、皮肤起皱和变色。我们提出了一种方法来模拟干燥的木乃伊化过程及其对尸体形态和外观的影响。木乃伊的身体由一个分层模型表示，该模型由代表体积的四面体网格和代表皮肤的高分辨率三角形表面网格组成。有限元方法用于解决水分扩散和由此产生的体积变形。使用基于位置的动力学实现皮肤起皱。为了模拟由于木乃伊化导致的皮肤颜色变化的视觉可信再现，使用了一种考虑水分含量的皮肤阴影方法，血红蛋白含量和氧饱和度。本文工作的主要重点是通过干燥重新创建木乃伊的外观变化，据我们所知，以前在计算机图形学中还没有尝试达到这种逼真程度。建议的方法能够模拟身体内部结构和表面外观的变化，这类似于自然干化木乃伊的死后过程。

更新日期：2020-06-08

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