9,362 research outputs found
A Benchmark for Region-of-Interest Detection in Images
No full text本論文提出了一影像中使用者感興趣區域 (region of interest) 偵測之資料集 (benchmark)。使用者感興趣區域偵測在許多應用中極為有用，過去雖然有許多使用者感興趣區域之自動偵測演算法被提出，然而由於缺乏公開資料集，這些方法往往只測試了各自的小量資料而難以互相比較。從其它領域可以發現，基於公開資料集的可重製實驗與該領域突飛猛進密切相關，因此本論文填補了此領域之不足，我們提出名為「Photoshoot」的遊戲來蒐集人們對於感興趣區域的標記，並以這些標記來建立資料集。透過這個遊戲，我們已蒐集大量使用者對於感興趣區域的標記，並結合這些資料成為使用者感興趣區域模型。我們利用這些模型來量化評估五個使用者感興趣區域偵測演算法，此資料集也可更進一步作為基於學習理論演算法的測試資料，因此使基於學習理論的偵測演算法成為可能。This thesis presents a benchmark for region of interest (ROI) detection. ROI detection has many useful applications and many algorithms have been proposed to automatically detect ROIs. Unfortunately, due to the lack of benchmarks, these methods were often tested on small data sets that are not available to others, making fair comparisons of these methods difficult. Examples from many fields have shown that repeatable experiments using published benchmarks are crucial to the fast advancement of the fields. To fill the gap, this thesis presents our design for a collaborative game, called Photoshoot, to collect human ROI annotations for constructing an ROI benchmark. With this game, we have gathered a large number of annotations and fused them into aggregated ROI models. We use these models to evaluate five ROI detection algorithms quantitatively. Furthermore, by using the benchmark as training data, learning-based ROI detection algorithms become viable.口試委員會審定書 i
中文摘要 iii
Abstract v
1 Introduction 1
2 Related work 5
3 Photoshoot 9
3.1 Game design 9
3.2 Implementation and other details 11
3.3 Statistics 12
4 ROI modeling 13
4.1 Target ROI model 14
4.2 Shoot ROI model 16
4.3 Results 18
5 Applications of Benchmarks 21
5.1 Quantitative evaluation 21
5.2 Learning from benchmarks 24
6 Conclusion and future work 25
Bibliography 2
An implementation for ray tracing out-of-core scenes on cloud
No full textRay tracing-based rendering methods can produce high quality and realistic images. However, it requires lots of computing resource to finish the rendering tasks so these kinds of methods are rarely used for small studios or individuals in the past. With the maturing of cloud computing services, small studios or individuals now rent computing resource on demand at affordable prices. This motivates us to combine the rendering with cloud computing to provide an elastic rendering framework.
In this work, we present an implementation of ray tracing with out-of-core scenes support in cloud computing environments. We design the distributed computing model, the network framework and the elastic resource utilization to support the rendering in cloud computing environments.
The experiments results show that the system has linear scalability for rendering performance with fault tolerance support. This work demonstrates the possibility for small studios or individuals to render high quality and realistic images using ray tracing-based rendering techniques in cloud computing environments. With the generalizable design, it might be also possible to extend our implementation to more applications other than rendering.口試委員會審定書 iii
Acknowledgements v
摘要 vii
Abstract ix
1 Introduction 1
2 Background 5
2.1 Computer graphics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.1 Modeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.2 Rendering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Cloud computing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Design and implementation 15
3.1 Distributed computing model . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1.1 Roles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.1.2 Scene partition . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.1.3 Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.1.4 Task categories . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.2 Communication framework . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.2.1 HTTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.2.2 JSON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.3 Elastic resource utilization . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.3.1 Dynamically adding or removing hosts . . . . . . . . . . . . . . 25
3.3.2 Scene-host map and host list updating . . . . . . . . . . . . 26
3.3.3 Fault tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4 Experiments and results 29
4.1 Experiment environment . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.2 Scalability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.3 System information updating . . . . . . . . . . . . . . . . . . . . . . . . 30
4.4 Elastic resources utilization . . . . . . . . . . . . . . . . . . . . . . . . . 31
5 Conclusion and future work 33
Bibliography 3
Tz-Lin Hsu Piano Recital Program Notes
No full textThis is the Program Notes of Tz-Lin Hsu\ue2s piano recital held on May 20th, 2020. The recital program includes Johann Sebastian Bach\ue2s The Well-Tempered Clavier, Book 1, Prelude and Fugue No. 17 in A-flat Major, BWV 862; Ludwig van Beethoven\ue2s Sonata No. 7 in D Major, Op. 10, No. 3, Jakob Ludwig Felix Mendelssohn Bartholdy\ue2s Fantasy in F-sharp minor, Op. 28; and Ignacy Jan Paderewski\ue2s Th\uc3\ua8me vari\uc3\ua8 in A Major, Op. 16, No. 3. The program notes will briefly introduce these four composers\ue2 lives, their compositional backgrounds, and the structure of each work, including the tonal organization and thematic materials
Polymer and tissue separation and micro/nano-fabrication via ultra-short pulsed laser plasma-mediated ablation
No full textMicro/nano-fabrication of polymers and micro-processing of real human tissues via plasma-mediated ablation were investigated using an ultra-short pulsed (USP) laser of 900 fs pulse duration and 1552 nm center wavelength. For the PDMS polymer micro-fabrication, the ablation threshold for the single spot and the single line scanning ablation features were studied at first. The single pulse ablation threshold is determined to be 4.62 J/cm2 and the incubation factor for the multi-pulse ablation is found to be 0.52. The influences of pulse overlap rate and irradiation pulse energy on the ablation line width, internal ablation interface depth, and ablation surface quality were scrutinized. Then the thin layer PDMS separation was completed with thickness controllable via adjusting the laser focus spot position. For the three tests with a target thickness of 20 μm, the averaged thickness of the separated thin layers is 20.6±1.7 μm. And a multi-width micro-channel interconnected network was fabricated and the size of the channels varies from 50 to 400 μm. For the real tissue ablation, the fundamental ablation features were investigated. It is found that the threshold of the single pulse ablation for the freeze-dried dermis (8.32±0.37 J/cm2) is slightly smaller than that of the wet dermis (9.65±1.21 J/cm2) due to the light absorption of water in wet tissues. Histological examinations were performed to evaluate the thermal damage and to find appropriate laser parameters for tissue micro-processing with minimal thermal damage. An analytical solution based on the heat conduction equation was derived to analyze the temperature distributions and to obtain the heat affected zones in materials ablated by USP laser line scanning. The analytical results were compared with the experimental measurements and a good agreement was found. Both results show that the thermal damage can be confined in a small zone about 10 µm with proper pulse energy and overlap rate. Pulse energy and pulse overlap rate were the key parameters for the generation and severity of thermal damage. In vitro wet tissue separation into layers by the USP laser ablation was demonstrated with thickness ranging from 200 to 600 μm. The unevenness of the separated layers is under 10%. Freeze-dried tissue stripping was also demonstrated with the stripped thickness in the range of 20 - 40 μm. No sign of visible thermal damage was found for both types of tissues. This study has provided an effective method that can precisely and non-intrusively process polymers and tissues with minimized thermal damage.Ph.D.Includes bibliographical referencesIncludes vitaby Huan Huan
Racial Replication - Michelle N. Huang in Conversation with Lisa Nakamura and Huan He
No full textAsiatic interchangeability is made, not born. In her talk, Michelle N. Huang discusses how dystopian clone narratives challenge notions of individual racialized identity at both the genetic and generic levels. Drawing on Saidiya Hartman's concept of racial fungibility, Huang will examine Kazuo Ishiguro's Never Let Me Go (2005) and Larissa Lai's Salt Fish Girl (2002) to trace how Asian American interchangeability is produced through reproductive control as well as an economy of character. In rearticulating, rather than rejecting, notions of shared subjectivity, hivemind, and fellow feeling, Asiatic clones ask for experimental alternatives to the ethnic bildungsroman and demonstrate the novel form itself to be a racialized technology of identity. Michelle N. Huang is an Assistant Professor of English and Asian American Studies at Northwestern University. She has research and teaching interests in contemporary Asian American literature, posthumanism, and feminist science studies. Her current project, Molecular Race, examines posthumanist aesthetics in post-1965 Asian American literature to trace racial representation and epistemology at nonhuman, minute scales. Molecular Race argues that a rapprochement with scientific discourse is necessary to fully grasp how the formal and aesthetic qualities of Asian American literature unsettle sedimented structures of racial formation.http://deepblue.lib.umich.edu/bitstream/2027.42/195279/1/racial_replication_flier.jpeghttp://deepblue.lib.umich.edu/bitstream/2027.42/195279/2/Racial_Replication__Michelle_N_Huang_in_Conversation_with_Lisa_Nakamura_and_Huan_He_Transcript.txthttp://deepblue.lib.umich.edu/bitstream/2027.42/195279/3/Racial_Replication__Michelle_N_Huang_in_Conversation_with_Lisa_Nakamura_and_Huan_He_Captioned.mp
Lian huan jin tao.
No full text黃漢勛演式 ; 黃子英攝影. 小番車 / 黃漢勛指導 ; 黃子英攝影. 八卦單刀 / 黃漢勛演式 ; 黃子英攝影. 九節地膛鞭 / 黃漢勛指導 ; 黃子英攝影.題名據相簿內頁.一本相簿盛載於一紙盒內.Huang Hanxun yan shi ; Huang Ziying she ying. Xiao fan che / Huang Hanxun zhi dao ; Huang Ziying she ying. Ba gua dan dao / Huang Hanxun yan shi ; Huang Ziying she ying. Jiu jie di tang bian / Huang Hanxun zhi dao ; Huang Ziying she ying.Ti ming ju xiang bu nei ye.Yi ben xiang bu cheng zai yu yi zhi he nei
How environmental conditions impact mosquito ecology and Japanese encephalitis: An eco-epidemiological approach
No full textAbstract not availableHuai-Yu Tian, Peng Bi, Bernard Cazelles, Sen Zhou, Shan-Qian Huang, Jing Yang, Yao Pei, Xiao-Xu Wu, Shi-Hong Fu, Shi-Lu Tong, Huan-Yu Wang, Bing X
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