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用小波技术分析遥感图像确定岸线位置的研究 被引量:13
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作者 杜涛 张斌 《海洋科学》 CAS CSCD 北大核心 1999年第4期19-21,共3页
关键词 小波技术 遥感 图像确定 岸线位置
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一种基于像素差值编码度量不确定SAR图像相似性的新方法 被引量:1
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作者 项德良 赵凌君 +2 位作者 唐涛 陆军 粟毅 《电子与信息学报》 EI CSCD 北大核心 2012年第9期2149-2155,共7页
在SAR图像目标识别、图像匹配等应用中,定义合理可靠的相似度尤为重要。该文在分析现有SAR图像相似度基础上,提出一种基于像素差值编码的相似度准则。首先将SAR图像按照相邻像素灰度差异生成编码图像,然后以编码图像之间的一致性作为相... 在SAR图像目标识别、图像匹配等应用中,定义合理可靠的相似度尤为重要。该文在分析现有SAR图像相似度基础上,提出一种基于像素差值编码的相似度准则。首先将SAR图像按照相邻像素灰度差异生成编码图像,然后以编码图像之间的一致性作为相似度。该文从理论上证明了该相似度对SAR图像中相干斑噪声、部分遮挡和模糊等因素的鲁棒性和适应性,还讨论了将该准则应用于SAR图像匹配时,如何针对不确定性,给出一定置信水平下所有合理的匹配位置。理论和实验结果表明该文提出的相似度准则对SAR图像上相干斑噪声、部分遮挡以及模糊不敏感,能有效应用于不确定SAR图像的匹配。 展开更多
关键词 图像处理 确定SAR图像 像素差值编码 相似度 匹配不确定
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Nay or Nyay 3: Epistemic Utility of Shadow of Ignorance that Obscures Mental Images and Associated States
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作者 Mahendra Kumar Jain Rafael Apitz-Castro 《Journal of Philosophy Study》 2016年第2期88-95,共8页
Survival of organisms requires response to sense inputs and feedback. An intuitive picture or mental image of reality from sense experience is apparently structured from orthogonal and independent sense inputs in asso... Survival of organisms requires response to sense inputs and feedback. An intuitive picture or mental image of reality from sense experience is apparently structured from orthogonal and independent sense inputs in association with past memories. Such images are not necessarily visual but may have such qualities. Play of mind with information in mental images processed by molecular actors is guided with rules of reality to assure non-contradictory outcome of actions for successful behaviors (Rogers and Jain 1993). Such functions have evolved to find food before becoming food, and fight or flight when in doubt. Shadows of ignorance that obscure mental images and associated states also have epistemic utility. Their success depends on learning from trials and errors to compensate for incomplete information and uncertainties with consideration of what could go wrong. Outcomes are also influenced by games played on mind by illusions, mistakes, surprises, ignorance. Loss of time, energy, and opportunity associated with ignored or misinterpreted information threaten survival. Equivocation, cynicism, wild goose chase, and vicious circle of sterile ideas encourage contradictory or inconsistent interpretations that compromise outcomes. Throughout the human history, ignorance of horsemen of apocalypse has unleashed havocs, perpetuated wars, epidemics, wrongful medical treatments, and economic disasters. What used to be crisis of ignorance has now become crisis of unintended consequences of inventions and other forms of knowledge. Ignorance of experts and head of states as horsemen of darkness brings misery to countless innocents. In Nay formalism, knowledge (gyan) is what knows with certainty (either as true or false). Identifying uncertainties introduces doubt (syad) in what one knows. For finding ones way around lack of relevant evidence (agyan), wisdom lies in recognition of ignorance and identifies problem to seek solution. Note that these states for propositions are not necessarily related by binary negations. 展开更多
关键词 epistemic value mental images IGNORANCE doubt CERTAINTY APOCALYPSE misrepresentation misinterpretation
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暴力情景、心理代偿与异时空共情:深度媒介化进程中的网络暴力逻辑
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作者 李姝慧 刘朝璞 《阅江学刊》 2024年第6期92-99,180,共9页
网络暴力作为典型的网络失范行为,是网络社会治理的重要对象,对其的生成方式和生成逻辑予以关照极具现实意义和学术价值。暴力具备的情景唤起和群体压力为网络暴力的生发提供了外在触发机制的可能性,生存比较下的心理代偿则反映了施暴... 网络暴力作为典型的网络失范行为,是网络社会治理的重要对象,对其的生成方式和生成逻辑予以关照极具现实意义和学术价值。暴力具备的情景唤起和群体压力为网络暴力的生发提供了外在触发机制的可能性,生存比较下的心理代偿则反映了施暴者内在的心理动机和情绪郁积,而仪式化的异时空共情互动则从行动上解释了群体连结中的情感能量赋能。就网络暴力而言,无论是暴力情景的建构、心理代偿的满足还是施暴群体的互动集结均遵循媒介化的运行逻辑,同时又建构和丰富了媒介化实践图景。 展开更多
关键词 网络暴力 图像确定性悖论 暴力情景 心理代偿
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