Correa Carlos D, Silver Deborah, Chen Min
Department of Electrical and Computer Engineering, Rutgers, The State University of New Jersey, USA.
IEEE Trans Vis Comput Graph. 2006 Sep-Oct;12(5):1069-76. doi: 10.1109/TVCG.2006.144.
In this paper we describe a GPU-based technique for creating illustrative visualization through interactive manipulation of volumetric models. It is partly inspired by medical illustrations, where it is common to depict cuts and deformation in order to provide a better understanding of anatomical and biological structures or surgical processes, and partly motivated by the need for a real-time solution that supports the specification and visualization of such illustrative manipulation. We propose two new feature-aligned techniques, namely surface alignment and segment alignment, and compare them with the axis-aligned techniques which was reported in previous work on volume manipulation. We also present a mechanism for defining features using texture volumes, and methods for computing correct normals for the deformed volume in respect to different alignments. We describe a GPU-based implementation to achieve real-time performance of the techniques and a collection of manipulation operators including peelers, retractors, pliers and dilators which are adaptations of the metaphors and tools used in surgical procedures and medical illustrations. Our approach is directly applicable in medical and biological illustration, and we demonstrate how it works as an interactive tool for focus+context visualization, as well as a generic technique for volume graphics.
在本文中，我们描述了一种基于GPU的技术，用于通过对体模型的交互式操作来创建说明性可视化。它部分受到医学插图的启发，在医学插图中，为了更好地理解解剖和生物结构或手术过程，描绘切割和变形是很常见的；部分则是出于对支持此类说明性操作的规范和可视化的实时解决方案的需求。我们提出了两种新的特征对齐技术，即表面对齐和片段对齐，并将它们与先前关于体操作的工作中报道的轴对齐技术进行比较。我们还提出了一种使用纹理体定义特征的机制，以及针对不同对齐方式计算变形体正确法线的方法。我们描述了基于GPU的实现，以实现这些技术的实时性能，以及一系列操作符，包括剥皮器、牵开器、钳子和扩张器，它们是手术过程和医学插图中使用的隐喻和工具的改编。我们的方法直接适用于医学和生物插图，并且我们展示了它如何作为焦点+上下文可视化的交互式工具以及体图形的通用技术发挥作用。
