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ABSTRACTLighting a cultural heritage artifact requires balancing visual perception with preventive conservation, by providing the best lighting (in terms of spectral distribution and quantity) to enable the viewer to appreciate details and color, while limiting photo-induced degradation. The paper outlines the methodology applied by a multi-disciplinary team while lighting the Shroud of Turin at its last public exhibition in 2015. The methodology considered the special requirements of the Shroud, including exposure to ultraviolet light, while providing appropriate display conditions that would meet audience expectations. The desired appearance (readability of the body image and color) was defined with the help of Shroud researchers and confirmed by subjective tests, while appropriate light levels for preservation were set in agreement with standard requirements and using knowledge of the degradation of linen in visible and UV light. The installation provided a controlled environment and a managed visitor route to the Shroud, assuring excellent perception of both details and color, with the lowest illuminance level about 15?lx. 相似文献
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Example based painting generation 总被引：1，自引：0，他引：1
GUO Yan-wen YU Jin-hui XU Xiao-dong WANG Jin PENG Qun-sheng 《浙江大学学报(A卷英文版)》2006,7(7):1152-1159
INTRODUCTION Non-photorealistic rendering (NPR) is a domain of computer graphics that has received more and more attention in the past decade. Different from realistic rendering, NPR concentrates on communicating the main context of an image and explores the rendering effect of the scene with the artistic styles, rather than seeking subtle geometry details and naturally physical attribute. Many research efforts were dedicated to simu- lating the traditional media (Hertzmann et al., 2001… 相似文献
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Huixiang Wang Fei Lyu Kapil Sugand Sheungting Wong Yanping Lin Qiugen Wang 《Anatomical sciences education》2019,12(6):655-663
Acetabular fractures are a real challenge for junior doctors as well as experienced orthopedic surgeons. Correct fracture classification is crucial for appreciating the fracture type, surgical planning, and predicting prognosis. Although three-dimensional (3D) tutorial is believed to improve the understanding of the complex anatomy structure, there have been few applications and randomized controlled trials to confirm it in orthopedics. This study aims to develop a 3D interactive software system for teaching acetabular fracture classification and evaluate its efficacy. Participants were randomly but evenly allocated into either the experimental group (who learned the acetabular fracture classification using a 3D software) or the control group (who used a traditional two-dimensional [2D] tutorial). Both groups were then tasked to classify 10 acetabular fractures and complete a five-point Likert scale on their satisfaction of each learning modality. To calculate significance (P < 0.05), independent t-test was used for normally distributed data whereas Mann-Whitney U test for non-normally distributed data. The experimental group significantly outperformed the control group (t (28) = 2.526, P = 0.017) with identifying correct acetabular fracture classification. Moreover, Likert scale score in the experimental group was also significantly higher than in the control group (Z = 2.477, P = 0.013). This 3D classification software has objectively and subjectively showed an advantage over the traditional 2D tutorial, resulting in an improved classification accuracy and higher Likert scale score. The 3D software has the potential to improve both clinical knowledge as well as identifying correct patient management in orthopedics. 相似文献
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In this paper I present the architecture of system that can be used for real time exploration and management of large medical volumetric datasets. The new state of the art solution presented in this paper is an example of visual data management system. System prototype evaluation proved that it is possible to use low-powered (and cheap) up-to-date mobile devices with programmable GPUs as the remote interfaces for exploration of large volumetric medical data. The implementation was done with high-level programming language that enables portability between different hardware models. The lack of lossy compression enables to display high quality medical images visualizations without any simplifications and noises in frequency domain. The prototype of system is capable to remotely render and send to a client (for example cell phone or tablet) rendered data with frequency 30 fps with limited resolution during interaction. One second after the interaction is finished client machine receives full resolution image. The evaluation of the system was performed on volumetric computed tomography angiography image with approximate size 5123 voxels. 相似文献
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通过对产品摄影的评价因素和对摄影棚拍摄特点的分析,分别以白色和黑色为渲染背景,建立了基于摄影棚模式的三维产品渲染流程。在虚拟摄影棚左侧、右侧和顶部建立三盏不同的矩形灯光,并结合材质设置和渲染参数设置,就能够渲染出白色背景的精美产品效果图;黑色背景的渲染是以一盏背景灯将产品从黑色背景中烘托出来,并利用模糊倒影来增强产品的立体感;还分析了产品渲染中实景匹配的两种方式,并提出透明材质物体渲染的注意事项。以渲染器Vray为实验平台,渲染结果真实度高。 相似文献
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论立功的成立条件 总被引：1，自引：0，他引：1
立功是1997年修订刑法新规定的一种量刑制度,对其研究相对薄弱。正确认识立功的成立条件,是司法实践中正确认定立功,从而对有立功表现的犯罪分子准确量刑的前提。关于立功成立条件,各家观点不一,主要有二要件说、三要件说与四要件说。对立功条件的分析归纳要源于法律的规定,忠于法律的规定;作为一种量刑制度它必然要求具有较强的可操作性,所以对立功成立条件的重构要以便于司法操作为宗旨。据此,重构后的立功之成立条件应包括前提条件、时间条件、行为条件与有效性条件四个方面。前提条件是犯罪分子实施了犯罪行为;时间跨度界定为“从犯罪成立之后至判决、裁定生效前”的时间段;行为条件是犯罪分子实施了对国家和社会有益的行为;有效性是立功是否成立的关键性条件。没有必要将主观方面单列为立功的成立条件。重大立功与立功没有本质上的差异,只是程度上的不同,所以重构后的立功成立的四个条件之原理对重大立功同样适用。 相似文献
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绘画作品以其鲜明的表达方式常常能给观众留下深刻的印象。但其对创作者的高要求使普通大众难以得心应手的自己进行创作。随着科学技术的发展,基于数码照片对各种绘画风格进行模拟成为了非真实感图形学研究的热点。本文在总结前人研究成果的基础上,结合尺度空间理论和边缘检测技术,提出了一种基于照片生成抽象线条画的方法。通过实验证明,本方法能较好的模拟线条画的主要特点。 相似文献