基于光谱增强指数与LeNet-5的古书画褪色文字提取与识别

古书画中所记载的文字是了解历史的珍贵资料,对褪色文字进行提取和识别是挖掘和展示历史价值的基础。本工作首次提出基于光谱增强指数与LeNet-5相结合的古书画褪色文字提取与识别方法：利用高光谱成像无损检测、光谱范围广等优点,获取古书画的高光谱数据,分析文字与背景的光谱特征,构建字迹增强指数,实现古书画中褪色文字的增强;构建LeNet-5卷积神经网络,利用手写汉字集进行训练,对密度分割后的字迹图像进行自动识别。以清代画家张士保所作《论道图》中部分褪色文字为例进行了验证,文字识别的正确率为70.8%。结果表明,本工作所提出方法可有效提高古书画褪色文字提取与识别的智能化程度。     

秦俑面部特征定量分析初探

秦始皇帝陵兵马俑自发现以来一直是学者们研究的热点,许多专家都做过秦俑面部特征的定性研究,但缺少定量论据。利用人脸识别技术对秦俑面部特征做定量分析,分析过程包括图像预处理、面部检测筛选、面部特征提取、面部特征向量表示、面部特征向量相似度计算、面部特征向量相似度分析等。通过单个秦俑面部相似度Top-N直观分析秦俑面部特征;通过热力图分析多个秦俑面部相似度,发现10个“特征鲜明”的秦俑及10个“大众脸”的秦俑;用直方图可视化秦俑面部相似度分布,揭示了秦俑面部相似度符合正态分布的规律。人脸识别技术为秦俑研究提供了一种定量分析思路,相关思路可以用于秦俑五官单特征、服饰纹理等分析,也为更大规模秦俑面部特征定量分析奠定了技术基础。     

Visitors' wayfinding strategies and navigational aids in unfamiliar urban environment

Abstract

The way visitors to a new city wayfind in the digital era has been given less research attention than might be expected. The main aim of this study is to examine differences in wayfinding strategies between three groups of participants who used different navigational aids: a group with a paper map, a group with the Google Maps app, and a group relying on local signage only. Methods included GPS tracking, and voice recording of decision-making using the think-aloud method. 38 participants who had never visited Brisbane, Australia, were recruited and placed in one of the three groups. They undertook a two-hour pedestrian wayfinding task and other research activities in the city centre. The results show there are significant differences in wayfinding strategies used by the three groups of participants. The GPS group preferred to follow the suggested route by their navigator, most of them ‘locking in’ as digital navigators throughout the task. By contrast, the local-signage-only group used a diverse range of strategies to wayfind. Local-signage-only and paper map users tried to locate their position in the city by using piloting or path integration strategies, the GPS group just passively followed the guidance line showed by their device. On completion of the task the digital navigators recognized less spatial information. Surprisingly, the digital navigators did not feel less anxious compared with the two other groups. Urban planners and designers may need to re-think their design strategies to interrupt digital navigation. The provision of a more diverse set of digital navigation options, rather than just shortest-path route identification, is likely desirable to assist navigators who wish to experience more on their pedestrian journeys.     

Rousseau’s Antidote to Egoism

ABSTRACT

Our contemporary culture has been labelled as one of “greed.” Our challenge, it is argued, is even more formidable if we recall Rousseau’s argument that it is the desire for esteem and fame that is the driving force of modern societies. This striving for recognition is the direct offspring of l’amour-propre, here translated as egoism. Contemporary economic systems thrive on this corrupted form of self-love, which is often sugarcoated as ambition, or even courage and vision. The development of l’amour-propre can be partly prevented and checked through the cultivation of l’amour-de-soi, conceived by Rousseau as being the source of the humane passions, a clear-sighted reason, and a mature conscience. At the cultural and institutional level, Rousseau’s thought implies a radical transformation that consists in the detachment of self-fulfillment from economic achievements, and the subordination of economic life and interests to other human ends, such as the good and virtuous human life. The corrupting effects of luxury and the loss of liberty caused by the multiplication of needs are therefore especially highlighted. Conversely, the alternative, non-military and non-materialist ethos in Rousseau’s works is emphasized.     

Federalism,constitutional recognition and Indigenous Peoples: how a new identity-based state can be established in Australia

ABSTRACT

The debate on constitutional recognition of Indigenous Peoples in Australia has highlighted the desire for meaningful responses to Indigenous Peoples’ claims to sovereignty and self-determination. One potential response is to apply federal principles and establish a new state, or states, for Indigenous Peoples in Australia. This proposal has been most prominently put by Tasmanian Aboriginal leader Michael Mansell. Others have followed. However, (at least) one fundamental problem with this federal idea has not been properly addressed, namely the dispersal and limited geographical concentration of Indigenous people in Australia. This paper asks whether and how federalism can be used to institutionalise the shared and self-rule of widely dispersed minorities, or more specifically, Indigenous Peoples in the settler-majority country of Australia. It demonstrates that a non-territorial approach can be applied to federalism in Australia, and that it may form one possible response to the Uluru Statement from the Heart.