40,013 research outputs found

    Unsupervised Sparse Dirichlet-Net for Hyperspectral Image Super-Resolution

    Full text link
    In many computer vision applications, obtaining images of high resolution in both the spatial and spectral domains are equally important. However, due to hardware limitations, one can only expect to acquire images of high resolution in either the spatial or spectral domains. This paper focuses on hyperspectral image super-resolution (HSI-SR), where a hyperspectral image (HSI) with low spatial resolution (LR) but high spectral resolution is fused with a multispectral image (MSI) with high spatial resolution (HR) but low spectral resolution to obtain HR HSI. Existing deep learning-based solutions are all supervised that would need a large training set and the availability of HR HSI, which is unrealistic. Here, we make the first attempt to solving the HSI-SR problem using an unsupervised encoder-decoder architecture that carries the following uniquenesses. First, it is composed of two encoder-decoder networks, coupled through a shared decoder, in order to preserve the rich spectral information from the HSI network. Second, the network encourages the representations from both modalities to follow a sparse Dirichlet distribution which naturally incorporates the two physical constraints of HSI and MSI. Third, the angular difference between representations are minimized in order to reduce the spectral distortion. We refer to the proposed architecture as unsupervised Sparse Dirichlet-Net, or uSDN. Extensive experimental results demonstrate the superior performance of uSDN as compared to the state-of-the-art.Comment: Accepted by The IEEE Conference on Computer Vision and Pattern Recognition (CVPR 2018, Spotlight

    Foreword to the special issue on pattern recognition in remote sensing

    Get PDF
    Cataloged from PDF version of article.The nine papers in this special issue focus on covering different aspects of remote sensing image analysis. Ā© 2012 IEE

    Theorizing the Law/Politics Distinction: Neutral Principles, Affirmative Action, and the Enduring Insight of Paul Mishkin

    Get PDF
    Early in his career Mishkin saw that the law could be apprehended from two distinct and in part incompatible perspectives: from the internal perspective of a faithful practitioner and from the external perspective of the general public. If the social legitimacy of the law as a public institution resides in the latter, the legal legitimacy of the law as a principled unfolding of professional reason inheres in the former. Mishkin came to believe that although the law required both forms of legitimacy, there was nevertheless serious tension between them, and he dedicated his scholarly career to attempting to theorize this persistent but necessary tension, which he conceived almost as a form of antinomy. In this article we pay tribute to Mishkin\u27s quest for understanding. We argue that the tension identified by Mishkin is significant and unavoidable, but that it is also exaggerated because it presupposes an unduly stringent separation between professional reason and popular values. In our view the law/politics distinction is both real and suffused throughout with ambiguity and uncertainty. The existence of the law/politics distinction creates the possibility of the rule of law, but the ragged and blurred boundaries of that distinction vivify the law by infusing it with the commitments and ideals of those whom the law purports to govern

    \u27Yet in a Primitive Condition\u27: Edward S. Curtis\u27s The North American Indian

    Full text link
    From 1907 to 1930, Edward S. Curtis created The North American Indian, a forty-volume edition of photographs and writings that he hoped would cover ā€œevery phase of Indian life of all tribes yet in a primitive condition.ā€ All evidence indicates that he set out to make a singular and uniļ¬ed work of art. However, a comparative analysis of photographs made at diļ¬€erent moments in this ambitious project reveals that The North American Indian ultimately is characterized not by stylistic and thematic unity but by signiļ¬cant shifts in aesthetic and political orientation. [excerpt

    John Moore Jr.: \u3ci\u3eMoore v. City of East Cleveland\u3c/i\u3e and Childrenā€™s Constitutional Arguments

    Get PDF
    This Article is divided into three parts. First, I retell the story of Moore from John Jr.ā€™s perspective and frame his potential claims. Second, I explore constitutional arguments under existing doctrine, using contemporary equal protection and substantive due process analyses. Finally, I suggest how a childrenā€™s rights perspective might be even more persuasive as a strategy for John Jr. as well as for achieving opportunity and equality on behalf of contemporary children living amid and affected by structural inequalities that impact their developmental capacity

    Foreword to the special Issue on Hyperspectral remote sensing and imaging spectroscopy

    Get PDF
    The twenty six papers in this special issue focus on the technologies of hyperspectral remote sensing (HRS)and imaging spectroscopy. HRS has emerged as a powerful tool to understand phenomena at local and global scales by virtue of imaging through a diverse range of platforms, including terrestrial in-situ imaging platforms, unmanned and manned aerial vehicles, and satellite platforms. By virtue of imaging over a wide range of spectral wavelengths, it is possible to characterize object specific properties very accurately. As a result, hyperspectral imaging (also known as imaging spectroscopy) has gained popularity for a wide variety of applications, including environment monitoring, precision agriculture, mineralogy, forestry, urban planning, and defense applications. The increased analysis capability comes at a costā€”there are a variety of challenges that must be overcome for robust image analysis of such data, including high dimensionality, limited sample size for training supervised models, noise and atmospheric affects, mixed pixels, etc. The papers in this issue represent some of the recent developments in image analysis algorithms and unique applications of hyperspectral imaging data

    The Trickle-Down War

    Get PDF
    The history of the European nation-state, wrote political sociologist Charles Tilly, is inextricably bound up with the history of warfare. To oversimplify Tillyā€™s nuanced and complex arguments, the story goes something like this: As power-holders (originally bandits and local strongmen) sought to expand their power, they needed capital to pay for weapons, soldiers and supplies. The need for capital and new recruits drove the creation of taxation systems and census mechanisms, and the need for more effective systems of taxation and recruitment necessitated better roads, better communications and better record keeping. This in turn enabled the creation of larger and more technologically sophisticated armies. The complexity and expense of maintaining more professionalized standing armies made it increasingly difficult for non-state groups to compete with states, giving centralized states a war-making advantage and enabling them to increasingly monopolize the means of large-scale violence. But the need to recruit, train and sustain ever-larger and more sophisticated armies also put pressure on these states to provide basic services, improving nutrition, education, and so on. Ultimately, we arrive at the late 20th century European welfare state, with its particular trade-offs between the state and its subjects

    Foreword to the Special Issue on Pattern Recognition in Remote Sensing

    Full text link

    Emerging technologies for learning report (volume 3)

    Get PDF
    • ā€¦
    corecore