title: ÐÐµÑÐ¾Ð´ Ð³Ð»Ð¾Ð±Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ ÑÐ¾Ð½Ð¾Ð²Ð¾Ð³Ð¾ Ð·Ð°ÑÐµÐ½ÐµÐ½Ð¸Ñ Ð´Ð»Ñ Ð²Ð¸Ð·ÑÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¾Ð±ÑÑÐ¼Ð¾Ð²
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Global background shading method for volumes visualization
Creators: name: ÐÐ»Ð°ÐºÑÐ¸Ð½, ÐÐ°Ð½Ð¸Ð¸Ð»
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: 3D Ð²Ð¸Ð·ÑÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ñ
3D Ð³ÑÐ°ÑÐ¸ÐºÐ°
Ð¼ÐµÑÐ¾Ð´Ñ Ð²Ð¸Ð·ÑÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸
Ð¼ÐµÐ´Ð¸ÑÐ¸Ð½ÑÐºÐ°Ñ Ð²Ð¸Ð·ÑÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ñ
Ð¾Ð±ÑÑÐ¼Ð½Ð¾Ðµ Ð·Ð°ÑÐµÐ½ÐµÐ½Ð¸Ðµ
Javascript
WebGl
Ð¼ÐµÐ´Ð¸ÑÐ¸Ð½ÑÐºÐ¾Ðµ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð½Ð¾Ðµ Ð¾Ð±ÐµÑÐ¿ÐµÑÐµÐ½Ð¸Ðµ
3D visualization
3D graphics
visualisation methods
medical visualization
ambient occlusion
medical software

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description: In this paper, an approach to the approximation of shading in rendering volumes is described, which does not require processing of thousands of rays to calculate shading. Instead of this, it is proposed to calculate the shading as a percentage of light-transmitting voxels in a certain area. Thus, much less computation is required. The research set the following goals: studying literature that describes various variations of the algorithms and the conditions for their applicability, writing a software implementation, and resolve issues of integrating shading methods into the provided Med3Web project. The Med3Web project is a high-performance web-based tool for visualizing medical data in the following formats: Dicom, Nifti, Ktx, Hdr. Written in Javascript using WebGL and the ThreeJS library. This project contains an implementation of another shading algorithm. The purpose of the work was also to compare the results of the work of new algorithms and the algorithm already available in the project on real medical data. As a result, four variations of the shading algorithm were implemented and the results of their work were considered, with various settings of the algorithm parameters. The shading algorithms implemented in the work are applicable for rendering almost any scene, if it is possible to get their voxel representation.