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基于视图感知的单视图三维重建算法 被引量:6
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作者 王年 胡旭阳 +1 位作者 朱凡 唐俊 《电子与信息学报》 EI CSCD 北大核心 2020年第12期3053-3060,共8页
尽管由于丢弃维度将3维(3D)形状投影到2维(2D)视图看似是不可逆的,但是从可视化到计算机辅助几何设计,各个垂直行业对3维重建技术的兴趣正迅速增长。传统基于物体深度图或者RGB图的3维重建算法虽然可以在一些方面达到令人满意的效果,但... 尽管由于丢弃维度将3维(3D)形状投影到2维(2D)视图看似是不可逆的,但是从可视化到计算机辅助几何设计,各个垂直行业对3维重建技术的兴趣正迅速增长。传统基于物体深度图或者RGB图的3维重建算法虽然可以在一些方面达到令人满意的效果,但是它们仍然面临若干问题:(1)粗鲁的学习2D视图与3D形状之间的映射;(2)无法解决物体不同视角下外观差异所带来的的影响;(3)要求物体多个观察视角下的图像。该文提出一个端到端的视图感知3维(VA3D)重建网络解决了上述问题。具体而言,VA3D包含多邻近视图合成子网络和3D重建子网络。多邻近视图合成子网络基于物体源视图生成多个邻近视角图像,且引入自适应融合模块解决了视角转换过程中出现的模糊或扭曲等问题。3D重建子网络使用循环神经网络从合成的多视图序列中恢复物体3D形状。通过在ShapeNet数据集上大量定性和定量的实验表明,VA3D有效提升了基于单视图的3维重建结果。 展开更多
关键词 视图感知 3维重建 视角转换 端到端神经网络 自适应融合
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自主水面船舶多视图图像拼接配准方法对比分析
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作者 朱文锋 尹勇 +1 位作者 杨志林 王秀玲 《船舶工程》 CSCD 北大核心 2024年第10期75-84,共10页
为增强图像拼接配准方法的实时性,提高配准精度,将加速增强特征检测(SURF)、二进制鲁棒不变可扩展关键点(BRISK)、定向特征检测和旋转不变特征描述(ORB)、非线性空间特征检测(KAZE)和快速非线性空间特征检测(AKAZE)等配准算法分别与图... 为增强图像拼接配准方法的实时性,提高配准精度,将加速增强特征检测(SURF)、二进制鲁棒不变可扩展关键点(BRISK)、定向特征检测和旋转不变特征描述(ORB)、非线性空间特征检测(KAZE)和快速非线性空间特征检测(AKAZE)等配准算法分别与图像分割融合方法结合,在不同数据集上拼接图像,并对比拼接结果的最终效果图,SSIM指标,NIQE指标以及配准阶段的配准结果图、时间成本和内部比率值。结果表明,SURF算法和AKAZE算法的配准所需时间成本最低,KAZE算法在配准精度方面较高,拼接结果的质量较好。自主水面船舶需要进行图像拼接配准时可根据实时性和拼接质量要求选择合适的算法。研究成果可为自主水面船舶图像拼接配准提供一定参考。 展开更多
关键词 自主水面船舶 图像拼接 特征检测 视图感知 图像配准
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试论视图全解析技术及挑战
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作者 程峰 侯林林 《武汉公安干部学院学报》 2021年第1期44-47,共4页
随着智能技术的持续发展,人工智能、大数据技术相继纳入国家发展战略,站在新的技术视角下,目前的视图解析方式和手段,受限于前期业界整体技术水平的制约,存在解析任务单一、视图信息整体提取挖掘比例较低的问题。与此相对的是,视图感知... 随着智能技术的持续发展,人工智能、大数据技术相继纳入国家发展战略,站在新的技术视角下,目前的视图解析方式和手段,受限于前期业界整体技术水平的制约,存在解析任务单一、视图信息整体提取挖掘比例较低的问题。与此相对的是,视图感知前端数量和感知数据量的空前增加,促使视图全解析的需求呼之欲出。鉴于此,我们从基础应用入手分析视图全解析的相关新技术,明确视图全解析的应用优势,结合实际应用中的关键问题,进行了探讨和研究。 展开更多
关键词 视图全解析 人工智能 视图感知
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3D场景表征—神经辐射场(NeRF)近期成果综述 被引量:2
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作者 朱方 《中国传媒大学学报(自然科学版)》 2022年第5期64-77,共14页
场景三维空间感知建模和基于先验的内容重现一直是信息技术围绕人类交互体验的重要努力方向,也是元宇宙和增强现实等数字和现实世界纽带构建技术的核心基础。当前,随着深度学习驱动的信息技术快速发展,特别是神经辐射场兴起,作为建模和... 场景三维空间感知建模和基于先验的内容重现一直是信息技术围绕人类交互体验的重要努力方向,也是元宇宙和增强现实等数字和现实世界纽带构建技术的核心基础。当前,随着深度学习驱动的信息技术快速发展,特别是神经辐射场兴起,作为建模和内容重现的核心—场景表征技术得到了跨越式发展。本文首先总结了不同表征技术的应用背景和近期基于深度学习所取得的进展;其次,对神经辐射场近期的重要成果进行了梳理和阐述;然后,就神经辐射场的场景构建和交叉领域研究的分析,揭示了显性空间和语义挖掘对神经辐射场的重要价值;最后,结合近期显性空间和语义挖掘中的重要发展方向,单视图3D场景感知,面临的挑战和神经辐射场相关研究展现的裨益,揭示了基于神经辐射场对场景三维空间感知建模和基于先验的内容重现发展带来的机遇。 展开更多
关键词 空间感知建模 内容重现 3D场景表征 神经辐射场 视图3D场景感知
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Objective measurement for image defogging algorithms 被引量:4
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作者 郭璠 唐琎 蔡自兴 《Journal of Central South University》 SCIE EI CAS 2014年第1期272-286,共15页
Since there is lack of methodology to assess the performance of defogging algorithm and the existing assessment methods have some limitations,three new methods for assessing the defogging algorithm were proposed.One w... Since there is lack of methodology to assess the performance of defogging algorithm and the existing assessment methods have some limitations,three new methods for assessing the defogging algorithm were proposed.One was using synthetic foggy image simulated by image degradation model to assess the defogging algorithm in full-reference way.In this method,the absolute difference was computed between the synthetic image with and without fog.The other two were computing the fog density of gray level image or constructing assessment system of color image from human visual perception to assess the defogging algorithm in no-reference way.For these methods,an assessment function was defined to evaluate algorithm performance from the function value.Using the defogging algorithm comparison,the experimental results demonstrate the effectiveness and reliability of the proposed methods. 展开更多
关键词 image defogging algorithm image assessment simulated foggy image fog density human visual perception
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From Quanta to Qualia: How a Paradigm Shift Turns Into Science
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作者 Deepak Chopra Menas C. Kafatos 《Journal of Philosophy Study》 2014年第4期287-301,共15页
Ever since the development of quantum mechanics in the first part of the 20th century, a new world view has emerged. Today, the physicalist objective assumption that objects exist independently of acts of observation ... Ever since the development of quantum mechanics in the first part of the 20th century, a new world view has emerged. Today, the physicalist objective assumption that objects exist independently of acts of observation has been challenged. The repercussions of this radical challenge to our common-sense perception of the world are far-reaching, although not yet generally realized. Here we argue that there is a complementary view to the way science which is being practiced, and that consciousness itself is primary and qualia form the foundation of experience. We outline the arguments of why the new science of qualia will tie objects that are being perceived to the subjective experience, through the units of subjective experience called qualia. If there is a reality that exists outside of perceptions in consciousness, it is indeed inconceivable. The reason is that once one subtracts everything that one can sense, imagine, feel, or think about, there's nothing left. Since qualia are subjective, they challenge the dominant world view of science as practiced today, which is reductionist, objective, and mathematical. Our view is a natural continuation of the quantum world view. We outline what the steps will have to be in order to fully develop the science of qualia. 展开更多
关键词 CONSCIOUSNESS quanta QUALIA Quantum Theory complementarity RECURSION
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John McDowell and the Future of Film Studies
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作者 Rick Costa 《Journal of Philosophy Study》 2014年第6期423-429,共7页
A key issue for the future direction of film studies is what is the nature of the perception film viewers have of a film and what is the nature of the perception characters in a film have of other characters in the fi... A key issue for the future direction of film studies is what is the nature of the perception film viewers have of a film and what is the nature of the perception characters in a film have of other characters in the film. The debate between the philosophers John McDowell and Hubert Dreyfus over the nature of perception in general illuminates this issue. McDowell argues that we must see perception as conceptual, while Dreyfus supports a non-conceptual view. McDowell's concept of second nature not only resolves this debate in his favor, but it provides a promising tool for the interpretation of individual films. Moreover, McDowell's conceptual view of perception rules out those approaches to the future of film studies that are based on a non-conceptualist framework. Finally, McDowell's approach leads to an emphasis on interpreting films with a focus on improving moral sensibilities. This perspective provides a viable blueprint for keeping film studies viable. 展开更多
关键词 film studies surveillance films The Lives of Others philosophy of perception CONCEPTUALISM JohnMcDowell Hubert Dreyfus Robert Sinnerbrink
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The Blind Spot of the Sovereign Eye: On the Gaze in Merleau-Ponty and Lacan
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作者 Lysane Fauvel 《Journal of Philosophy Study》 2012年第7期450-462,共13页
In this essay I will explicate the gaze (le regard) and the ways in which it exceeds or transcends what we know as vision, the objectifying or representational power of the eyes. Building critically on Sartre, the g... In this essay I will explicate the gaze (le regard) and the ways in which it exceeds or transcends what we know as vision, the objectifying or representational power of the eyes. Building critically on Sartre, the gaze in Lacan and Merleau-Ponty is part of the technical apparatus used to describe the foundation, production, and reproduction of the subject. I will begin by discussing the role of visual perception in subject-formation in their respective work, differentiating between the Merleau-Pontian notion of the "gaze of the world," i.e., the ways in which things cast their gaze upon us, and the Lacanian gaze as a manifestation of the scopic drive. Through an analysis of anamorphosis I will show (1) how the gaze evades the spectator, (2) what the relationship of the gaze is to the object petit a as the object of the scopic drive, and (3) how both Merleau-Ponty and Lacan require a movement that precedes and destabilizes the subject of intentional consciousness. 展开更多
关键词 PHENOMENOLOGY PSYCHOANALYSIS MERLEAU-PONTY Lacan GAZE Anamorphosis
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