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The Global ETD Search service is a free service for researchers
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Showing 1 to 4 of 4 (0.015 seconds)| 1 |
Face Recognition using Local Descriptors and Different Classification SchemasLiu,Ting Unknown Date
No description available.
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| 2 |
A multimodal deep learning framework using local feature representations for face recognitionAl-Waisy, Alaa S., Qahwaji, Rami S.R., Ipson, Stanley S., Al-Fahdawi, Shumoos 04 September 2017 (has links)
Yes / The most recent face recognition systems are
mainly dependent on feature representations obtained using
either local handcrafted-descriptors, such as local binary patterns
(LBP), or use a deep learning approach, such as deep
belief network (DBN). However, the former usually suffers
from the wide variations in face images, while the latter
usually discards the local facial features, which are proven
to be important for face recognition. In this paper, a novel
framework based on merging the advantages of the local
handcrafted feature descriptors with the DBN is proposed to
address the face recognition problem in unconstrained conditions.
Firstly, a novel multimodal local feature extraction
approach based on merging the advantages of the Curvelet
transform with Fractal dimension is proposed and termed
the Curvelet–Fractal approach. The main motivation of this
approach is that theCurvelet transform, a newanisotropic and
multidirectional transform, can efficiently represent themain
structure of the face (e.g., edges and curves), while the Fractal
dimension is one of the most powerful texture descriptors
for face images. Secondly, a novel framework is proposed,
termed the multimodal deep face recognition (MDFR)framework,
to add feature representations by training aDBNon top
of the local feature representations instead of the pixel intensity
representations. We demonstrate that representations acquired by the proposed MDFR framework are complementary
to those acquired by the Curvelet–Fractal approach.
Finally, the performance of the proposed approaches has
been evaluated by conducting a number of extensive experiments
on four large-scale face datasets: the SDUMLA-HMT,
FERET, CAS-PEAL-R1, and LFW databases. The results
obtained from the proposed approaches outperform other
state-of-the-art of approaches (e.g., LBP, DBN, WPCA) by
achieving new state-of-the-art results on all the employed
datasets.
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| 3 |
Shape Based Methods for Quantification and Comparison of Object Properties from Their Digital Image Representations / Mетоде засноване на облику за квантитативни опис и поређење облика објеката приказаних дигиталним сликама / Metode zasnovane na obliku za kvantitativni opis i poređenje oblika objekata prikazanih digitalnim slikamaDražić Slobodan 20 February 2019 (has links)
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5.4pt;mso-para-margin:0in;mso-para-margin-bottom:.0001pt;mso-pagination:widow-orphan;font-size:11.0pt;font-family:"Calibri","sans-serif";mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:"Times New Roman";mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi;}</style><![endif]--><span style="font-size:9.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman";mso-font-kerning:.5pt;mso-ansi-language:EN-US;mso-fareast-language:AR-SA;mso-bidi-language:AR-SA">The </span><span lang="sr-Latn-RS" style="font-size:9.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman";mso-font-kerning:.5pt;mso-ansi-language:#241A;mso-fareast-language:AR-SA;mso-bidi-language:AR-SA">t</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman";mso-font-kerning:.5pt;mso-ansi-language:EN-US;mso-fareast-language:AR-SA;mso-bidi-language:AR-SA">hesis investigates development, improvement and evaluation of methods for quantitative characterization of objects from their digital images and similarity measurements between digital images. Methods for quantitative characterization of objects from their digital images are increasingly used in applications in which error can </span><span lang="sr-Latn-RS" style="font-size:9.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman";mso-font-kerning:.5pt;mso-ansi-language:#241A;mso-fareast-language:AR-SA;mso-bidi-language:AR-SA">have crtical consequences, </span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman";mso-font-kerning:.5pt;mso-ansi-language:EN-US;mso-fareast-language:AR-SA;mso-bidi-language:AR-SA">but the traditional methods for shape quantification are of low precision and accuracy. </span><span lang="sr-Latn-RS" style="font-size:9.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman";mso-font-kerning:.5pt;mso-ansi-language:#241A;mso-fareast-language:AR-SA;mso-bidi-language:AR-SA">In the thesis is shown </span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman";mso-font-kerning:.5pt;mso-ansi-language:EN-US;mso-fareast-language:AR-SA;mso-bidi-language:AR-SA">that the </span><span lang="sr-Latn-RS" style="font-size:9.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman";mso-font-kerning:.5pt;mso-ansi-language:#241A;mso-fareast-language:AR-SA;mso-bidi-language:AR-SA">coverage of a pixel by a shape can</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman";mso-font-kerning:.5pt;mso-ansi-language:EN-US;mso-fareast-language:AR-SA;mso-bidi-language:AR-SA"> be used to highly improve the accuracy and precision of using digital images to estimate the maximal distance between objects </span><span lang="sr-Latn-RS" style="font-size:9.0pt;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman";mso-font-kerning:.5pt;mso-ansi-language:#241A;mso-fareast-language:AR-SA;mso-bidi-language:AR-SA">furthest points measured in a given direction. It is highly desirable that a distance measure between digital images can be related to a certain shape property and morphological operations are used when defining a distance for this purpose. Still, the distances defined in this manner turns out to be insufficiently sensitive to relevant data representing shape properties in images. We show that the idea of adaptive mathematical morphology can be used successfully to overcome problems related to sensitivity of distances defined via morphological operations when comparing objects from their digital image representations.</span></p> / <p>У тези су размотрени развој, побољшање и евалуација метода за квантитативну карактеризацију објеката приказаних дигиталним сликама, као и мере растојања између дигиталних слика. Методе за квантитативну карактеризацију објеката представљених дигиталним сликама се све више користе у применама у којима грешка може имати критичне последице, а традиционалне методе за квантитативну карактеризацију су мале прецизности и тачности. У тези се показује да се коришћењем информације о покривеност пиксела обликом може значајно побољшати прецизност и тачност оцене растојања између две најудаљеније тачке облика мерено у датом правцу. Веома је пожељно да мера растојања између дигиталних слика може да се веже за одређену особину облика и морфолошке операције се користе приликом дефинисања растојања у ту сврху. Ипак, растојања дефинисана на овај начин показују се недовољно осетљива на релевантне податке дигиталних слика који представљају особине облика. У тези се показује да идеја адаптивне математичке морфологије може успешно да се користи да би се превазишао поменути проблем осетљивости растојања дефинисаних користећи морфолошке операције.</p> / <p>U tezi su razmotreni razvoj, poboljšanje i evaluacija metoda za kvantitativnu karakterizaciju objekata prikazanih digitalnim slikama, kao i mere rastojanja između digitalnih slika. Metode za kvantitativnu karakterizaciju objekata predstavljenih digitalnim slikama se sve više koriste u primenama u kojima greška može imati kritične posledice, a tradicionalne metode za kvantitativnu karakterizaciju su male preciznosti i tačnosti. U tezi se pokazuje da se korišćenjem informacije o pokrivenost piksela oblikom može značajno poboljšati preciznost i tačnost ocene rastojanja između dve najudaljenije tačke oblika mereno u datom pravcu. Veoma je poželjno da mera rastojanja između digitalnih slika može da se veže za određenu osobinu oblika i morfološke operacije se koriste prilikom definisanja rastojanja u tu svrhu. Ipak, rastojanja definisana na ovaj način pokazuju se nedovoljno osetljiva na relevantne podatke digitalnih slika koji predstavljaju osobine oblika. U tezi se pokazuje da ideja adaptivne matematičke morfologije može uspešno da se koristi da bi se prevazišao pomenuti problem osetljivosti rastojanja definisanih koristeći morfološke operacije.</p>
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Biometric Multi-modal User Authentication System based on Ensemble ClassifierAssaad, Firas Souhail January 2014 (has links)
No description available.
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