You searched for subject:(background removal).
Showing records 1 – 8 of
8 total matches.
No search limiters apply to these results.
University of New South Wales
1.
Conroy, Kathryn.
Super clip mathematics as applied to Fourier transform infrared interferograms.
Degree: Engineering & Information Technology, 2013, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/53115 
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11801/SOURCE01?view=true
► In this thesis, a digital signal processing (DSP) strategy for the Fourier transform infrared (FT-IR) spectrometer called Super Clip Mathematics is presented. This work is…
(more)
▼ In this thesis, a digital signal processing (DSP) strategy for the Fourier transform infrared (FT-IR) spectrometer called Super Clip Mathematics is presented. This work is motivated by the issue of collecting a reliable FT-IR
background spectrum while collecting data in a dynamic environment. Super Clip Mathematics addresses this problem by extracting data contained within a single interferogram in lieu of collecting a
background spectrum. This regime utilizes the pre-established technique of super clip apodization (SCA) and defines a new DSP strategy called complementary super clip apodization (CSCA), where both methods are generally defined by the umbrella term of Super Clip Mathematics. SCA is a DSP strategy that calculates a
background spectrum by isolating and Fourier transforming the central burst of an interferogram. A secondary strategy is described herein as CSCA, where all of the interferogram except the center-burst is Fourier transformed for the calculation of an absorbance spectrum. Upon isolation of these regions of the time-domain waveform, each method may subsequently calculate a quantitative absorbance spectrum. Interferogram manipulation in this fashion has been previously discounted by its community because there is a lack of systematic investigation into its potential. The outcomes of this work suggest that the limitation of Super Clip Mathematics is not the signal processing strategy itself, but the way in which it is implemented. An implementation algorithm that systematically optimizes the number of points truncated or included during Super Clip Mathematics analysis is presented. With this protocol, carbon dioxide, nitromethane, ethanol and acetone interferograms are analyzed to calculate quantitative absorbance spectra. This is significant because the latter three substances have spectral widths that are considered too wide by convention, yet their successful analysis in univariate and multivariate studies is shown. For comparison, the linear regression models built with Super Clip Mathematics spectra are compared to those built with spectra calculated by taking the logarithmic ratio of a
background and sample spectra; and the results indicate that there is almost no statistical difference between them. The issue of collecting a characteristic
background may be circumvented by utilizing data already present in the sample interferogram with Super Clip Mathematics.
Advisors/Committee Members: Harb, Charles, Engineering & Information Technology, UNSW Canberra, UNSW, Huntington, Elanor, Engineering & Information Technology, UNSW Canberra, UNSW.
Subjects/Keywords: Background Removal; Super Clip Mathematics; FT-IR
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Conroy, K. (2013). Super clip mathematics as applied to Fourier transform infrared interferograms. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/53115 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11801/SOURCE01?view=true
Chicago Manual of Style (16th Edition):
Conroy, Kathryn. “Super clip mathematics as applied to Fourier transform infrared interferograms.” 2013. Doctoral Dissertation, University of New South Wales. Accessed January 25, 2021.
http://handle.unsw.edu.au/1959.4/53115 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11801/SOURCE01?view=true.
MLA Handbook (7th Edition):
Conroy, Kathryn. “Super clip mathematics as applied to Fourier transform infrared interferograms.” 2013. Web. 25 Jan 2021.
Vancouver:
Conroy K. Super clip mathematics as applied to Fourier transform infrared interferograms. [Internet] [Doctoral dissertation]. University of New South Wales; 2013. [cited 2021 Jan 25].
Available from: http://handle.unsw.edu.au/1959.4/53115 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11801/SOURCE01?view=true.
Council of Science Editors:
Conroy K. Super clip mathematics as applied to Fourier transform infrared interferograms. [Doctoral Dissertation]. University of New South Wales; 2013. Available from: http://handle.unsw.edu.au/1959.4/53115 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11801/SOURCE01?view=true
KTH
2.
Sandström, Gustav.
Foreground detection in specific outdoor scenes : A review of recognized techniques and proposed improvements for a real-time GPU-based implementation in C++.
Degree: Computer Science and Communication (CSC), 2016, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200128
► Correct insertion of computer graphics into live-action broadcasts of outdoor sports requires precise knowledge of the foreground, i.e. players present in the scene. This…
(more)
▼ Correct insertion of computer graphics into live-action broadcasts of outdoor sports requires precise knowledge of the foreground, i.e. players present in the scene. This thesis proposes a foreground detection and segmentation- framework with focus on real-time performance for 1080p resolution. A dataset consisting of four scenes; single-, multi-segment-, transcending-foreground and a light-witch scene all with dynamic backgrounds was constructed together with 26 ground-truths. Results show that the framework should run internally at 288p using GPU acceleration with geometrical nearest-neighbour-interpolation to attain real-time-capability. To maximize accuracy of the results, the framework uses two instances of OpenCV MOG2 in parallel on differently downsampled frames that are bitwise-joined to increase robustness. A set of morphological operations provides post-processing to get spatial coherence and a specific turf- consideration gives accurate contours. Thanks to additional camera- operator input, a crude distance-estimate lets foreground segments fade into background at a predetermined depth. The framework suffers from inaccurate segmentation during rapid light-switches, but recovers in a matter of seconds like the 'vanilla' MOG algorithm. For the specific scenes the framework provides excellent performance, especially considering the light-switch scene by comparison to the MOG-algorithm. For non-specific scenes of the 'BMC 2012' performance does not exceed the current state-of-the-art.
Korrekt placering av datorgrafik i video för tv-produktion kräver god känndedom om aktuell förgrund. Denna avhandling föreslår ett förgrundsdetektions- och segmenterings- ramverk med fokus på realtidsbearbetning av full-HD upplöst sport i utomhusmiljö. För utvärdering skapades ett dataset bestående av fyra scener; singel-, multisegment-, avlägsnande-förgrund och en ljusomväxlingsscen tillsammans med 26 referensförgrunder. För att erhålla realtidsbearbetning skall ramverket internt nyttja 288p upplösning med GPU acceleration och geometrisk närmaste-granne-interpolation. Resultaten visade att maximal noggranhet och ökad robusthet erhölls med två instanser av OpenCV MOG2 arbetandes parallellt på olikt nerskalade bilder för att därefter pixelvis förenas. För att erhålla sammanhängande förgrundssegment nyttjades morfologiska operationer på den binära sammansatta förgrunden vilket tillsammans med en specifik gräskantskorrektion ger precisa konturer. Tack vare givna kameraparametrar kan djupet till förgrundselementen uppskattas därmed låts de övergå till bakgrund för ett visst djupt. Ramverket lider av oprecis segmententering vid snabba ljusomväxlingar, men återhämtar sig när bakgrundsmodellen uppdaterats till de nya ljusförutsättningarna. För ovan nämnda specifika scener presterar ramverket utmärkt, speciellt med avseende på ljusomväxlingen, där prestandan är flerfaldigt bättre än den enskilda 'MOG'-metoden. För generella scener ur 'BMC 2012' datasetet presterar vår metod dock inte bättre än state-of-the-art.
Subjects/Keywords: foreground detection; background subtraction; background removal; real-time image processing; Computer Sciences; Datavetenskap (datalogi)
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sandström, G. (2016). Foreground detection in specific outdoor scenes : A review of recognized techniques and proposed improvements for a real-time GPU-based implementation in C++. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200128
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sandström, Gustav. “Foreground detection in specific outdoor scenes : A review of recognized techniques and proposed improvements for a real-time GPU-based implementation in C++.” 2016. Thesis, KTH. Accessed January 25, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200128.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sandström, Gustav. “Foreground detection in specific outdoor scenes : A review of recognized techniques and proposed improvements for a real-time GPU-based implementation in C++.” 2016. Web. 25 Jan 2021.
Vancouver:
Sandström G. Foreground detection in specific outdoor scenes : A review of recognized techniques and proposed improvements for a real-time GPU-based implementation in C++. [Internet] [Thesis]. KTH; 2016. [cited 2021 Jan 25].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200128.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sandström G. Foreground detection in specific outdoor scenes : A review of recognized techniques and proposed improvements for a real-time GPU-based implementation in C++. [Thesis]. KTH; 2016. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200128
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
3.
Yang, Xiaoyi.
Background reconstruction from multiple images : Reconstruction d'une scène masquée à partir de multi-image.
Degree: Docteur es, Traitement du signal et des images, 2018, Université Paris-Saclay (ComUE)
URL: http://www.theses.fr/2018SACLT020
► La problématique générale de cette thèse est de reconstituer la scène de fond à partir d’une séquence d’images en présence de masques d’avant-plan. Nous nous…
(more)
▼ La problématique générale de cette thèse est de reconstituer la scène de fond à partir d’une séquence d’images en présence de masques d’avant-plan. Nous nous sommes intéressés aux méthodes pour détecter ce qui constitue le fond ainsi que les solutions pour corriger les parties cachées et les distorsions géométrique et chromatique introduites lors de la photographie.Une série de processus est proposée, dont la mise en œuvre comporte dans l'ordre l’alignement géométrique, le réglage chromatique, la fusion des images et la correction des défauts.Nous nous plaçons dans l’hypothèse où le fond est porté sur une surface plane. L'alignement géométrique est alors réalisé par calcul de l'homographie entre une image quelconque et l’image qui sert de référence, suivi d’une interpolation bilinéaire.Le réglage chromatique vise à retrouver un même contraste dans les différentes images. Nous proposons de modéliser la mise en correspondance chromatique entre images par une approximation linéaire dont les paramètres sont déterminés par les résultats de la mise en correspondance des points de contrôle (SIFT).Ces deux étapes sont suivies par une étape de fusion. Plusieurs techniques sont comparées.La première proposition est d’étendre la définition de la médiane dans l’espace vectoriel. Elle est robuste lorsqu’il y a plus de la moitié des images qui voient les pixels d’arrière-plan. En outre, nous concevons un algorithme original basé sur la notion de clique. Il permet de détecter le plus grand nuage de pixels dans l'espace RGB. Cette approche est fiable même lorsque les pixels d’arrière-plan sont minoritaires.Lors de la mise en œuvre de ce protocole, on constate que certains résultats de fusion présentent des défauts de type flou dus à l’existence d’erreurs d’alignement géométrique. Nous proposons donc un traitement complémentaire. Il est basé sur une comparaison entre le résultat de fusion et les images alignées après passage d'un filtre gaussien. Sa sortie est un assemblage des morceaux très détaillés d'image alignés qui ressemblent le plus au résultat de fusion associés.La performance de nos méthodes est évaluée par un ensemble de données contenant de nombreuses images de qualités différentes. Les expériences confirment la fiabilisé et la robustesse de notre conception dans diverses conditions de photographie.
The general topic of this thesis is to reconstruct the background scene from a burst of images in presence of masks. We focus on the background detection methods as well as on solutions to geometric and chromatic distortions introduced during ph-otography. A series of process is proposed, which consists of geometric alignment, chromatic adjustment, image fusion and defect correction.We consider the case where the background scene is a flat surface. The geometric alignment between a reference image and any other images in the sequence, depends on the computation of a homography followed by a bilinear interpolation.The chromatic adjustment aims to attach a similar contrast to the scene in different images. We…
Advisors/Committee Members: Maître, Henri (thesis director), Tendero, Yohann (thesis director).
Subjects/Keywords: Reconstruction d'image; Suppression de masque; Estimation d'arrière-Plan; Image reconstruction; Mask removal; Background estimation
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yang, X. (2018). Background reconstruction from multiple images : Reconstruction d'une scène masquée à partir de multi-image. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2018SACLT020
Chicago Manual of Style (16th Edition):
Yang, Xiaoyi. “Background reconstruction from multiple images : Reconstruction d'une scène masquée à partir de multi-image.” 2018. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed January 25, 2021.
http://www.theses.fr/2018SACLT020.
MLA Handbook (7th Edition):
Yang, Xiaoyi. “Background reconstruction from multiple images : Reconstruction d'une scène masquée à partir de multi-image.” 2018. Web. 25 Jan 2021.
Vancouver:
Yang X. Background reconstruction from multiple images : Reconstruction d'une scène masquée à partir de multi-image. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2018. [cited 2021 Jan 25].
Available from: http://www.theses.fr/2018SACLT020.
Council of Science Editors:
Yang X. Background reconstruction from multiple images : Reconstruction d'une scène masquée à partir de multi-image. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2018. Available from: http://www.theses.fr/2018SACLT020
RMIT University
4.
Esmaiel Zadeh Kandjani, A.
Zinc oxide based nano-composites for multifunctional applications.
Degree: 2014, RMIT University
URL: http://researchbank.rmit.edu.au/view/rmit:161475
► Most of the spectroscopic and other analytical sensing technologies get frequently interfered from the instrumental noise and background in the spectra. Especially scattering based technique…
(more)
▼ Most of the spectroscopic and other analytical sensing technologies get frequently interfered from the instrumental noise and background in the spectra. Especially scattering based technique such as Surface Enhanced Raman Spectroscopy (SERS), where the Raman scattering signal component often has significant contributions from the background and noise, and therefore needs a proper removal of these unfavourable components from the signals. As the sensing technique in this thesis was based on SERS method, in this research a new methodology has been introduced to answer the needs for more reliable background correction for ultrahigh sensitive nanosensing applications. Photocatalytic activities of zinc oxide nano-arrays and ability of integrating this property with the other useful applications like biological and chemical sensing can bring a variety of novel applications. The controllable synthesis of this material with desired physical parameters, different substrates and also their ability to form heterojunction with the highest controllability are some of the advantages of using these nanostructures for different applications. These arrays have shown a good reproducibility and morphological control during synthesis procedure which makes them interesting materials to be used as SERS based sensing substrates in order to obtain higher reproducibility and sensitivity. Also, as zinc oxide is a photocatalyst, using this material can give broader functionality to the sensing platform. Not only can it make the senso re-generable, but also, it can be used for removing the heavy metal ions from the water. The combination of ZnO/Ag nano-arrays can make dual sensing ability of biological sensing and selective Hg2+ sensing abilities. Organic semiconductors have attracted many researchers’ attention as they are easy to control based on the band-gap, thus opening new applications where the inorganic semiconductors fail to operate. In addition, the heterojunction formation between organic and inorganic semiconductors can bring more possibilities and opportunities for developing new optoelectronics devices. In this regard, decorating silver nanostructures on the surface of an inorganic semiconductor can bring other functionalities to n-type ZnO nanostructures as Ag can be easily changed to metal-organic semiconductor molecule of AgTCNQ. The method for fabricating reproducible and simple approach to syntheses of inorganic-organic hybrids of AgTCNQ-ZnO (p-n heterojunction) was another aim of this research. In this thesis, this heterojunction has been synthesized and studied for increasing the activities of ZnO photocatalyst, where proposed method can be extended for synthesis of other controlled heterojunctions. The work presented in this thesis focuses on fine-tuning the morphology of ZnO semiconductors and preparing functional materials such as ZnO-metal and ZnO-organic semiconductor hybrids. Applications of these materials in photocatalytic degradation of environmental pollutants and sensing of ecotoxic chemical species are…
Subjects/Keywords: Fields of Research; Zinc Oxide; AgTCNQ; Photocatalysis; Surface Enhanced Raman Spectroscopy; Background correction; Mercury sensing; Mercury removal; p-n Junction
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Esmaiel Zadeh Kandjani, A. (2014). Zinc oxide based nano-composites for multifunctional applications. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:161475
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Esmaiel Zadeh Kandjani, A. “Zinc oxide based nano-composites for multifunctional applications.” 2014. Thesis, RMIT University. Accessed January 25, 2021.
http://researchbank.rmit.edu.au/view/rmit:161475.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Esmaiel Zadeh Kandjani, A. “Zinc oxide based nano-composites for multifunctional applications.” 2014. Web. 25 Jan 2021.
Vancouver:
Esmaiel Zadeh Kandjani A. Zinc oxide based nano-composites for multifunctional applications. [Internet] [Thesis]. RMIT University; 2014. [cited 2021 Jan 25].
Available from: http://researchbank.rmit.edu.au/view/rmit:161475.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Esmaiel Zadeh Kandjani A. Zinc oxide based nano-composites for multifunctional applications. [Thesis]. RMIT University; 2014. Available from: http://researchbank.rmit.edu.au/view/rmit:161475
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
5.
Liu, Saifeng.
Technical Improvements in Quantitative Susceptibility Mapping.
Degree: PhD, 2014, McMaster University
URL: http://hdl.handle.net/11375/14036
► Quantitative susceptibility mapping (QSM) is a promising technique to study tissue properties and function in vivo. The presence of a susceptibility source will lead…
(more)
▼ Quantitative susceptibility mapping (QSM) is a promising technique to study tissue properties and function in vivo. The presence of a susceptibility source will lead to a non-local field variation which manifests as a non-local behavior in magnetic resonance phase images. QSM is an ill-posed inverse problem that maps the phase back to the susceptibility source. In practice, the phase images are usually contaminated by background field inhomogeneities. In this thesis, several technical advances in QSM have been made which accelerate the data processing and improve the accuracy of this ill-posed problem. For background field removal, the local spherical mean value filtering (LSMV) is proposed, in which the global phase unwrapping is bypassed. This algorithm improves the time-efficiency and robustness of background field removal. For solving the inverse problem, an improved version of the k-space/image domain iterative algorithm is demonstrated using multi-level thresholding to account for the variation in the susceptibilities of different structures in the brain. The susceptibility maps could be used to generate orientation independent weighting masks, to form a new type of susceptibility weighted image (SWI), referred to here as true-SWI (tSWI). The tSWI data show improved contrast-to-noise ratio (CNR) of the veins and reduced blooming artefacts of the microbleeds. Finally, it is shown that the effective magnetic moment, being the product of the apparent volume and the measured susceptibility of the small object, is constant. This can be used to improve the susceptibility quantification, if a priori information of the volume is available.
Doctor of Philosophy (PhD)
Advisors/Committee Members: Haacke, Mark E., Nicholas Bock, Qiyin Fang, Maureen MacDonald, Michael Noseworthy, Biomedical Engineering.
Subjects/Keywords: Quantitative susceptibility mapping; phase imaging; background field removal; inverse problem; tSWI; magnetic moment; Biomedical Engineering and Bioengineering; Biomedical Engineering and Bioengineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Liu, S. (2014). Technical Improvements in Quantitative Susceptibility Mapping. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/14036
Chicago Manual of Style (16th Edition):
Liu, Saifeng. “Technical Improvements in Quantitative Susceptibility Mapping.” 2014. Doctoral Dissertation, McMaster University. Accessed January 25, 2021.
http://hdl.handle.net/11375/14036.
MLA Handbook (7th Edition):
Liu, Saifeng. “Technical Improvements in Quantitative Susceptibility Mapping.” 2014. Web. 25 Jan 2021.
Vancouver:
Liu S. Technical Improvements in Quantitative Susceptibility Mapping. [Internet] [Doctoral dissertation]. McMaster University; 2014. [cited 2021 Jan 25].
Available from: http://hdl.handle.net/11375/14036.
Council of Science Editors:
Liu S. Technical Improvements in Quantitative Susceptibility Mapping. [Doctoral Dissertation]. McMaster University; 2014. Available from: http://hdl.handle.net/11375/14036
University of North Texas
6.
Mohapatra, Deepankar.
Automatic Removal of Complex Shadows From Indoor Videos.
Degree: 2015, University of North Texas
URL: https://digital.library.unt.edu/ark:/67531/metadc804942/
► Shadows in indoor scenarios are usually characterized with multiple light sources that produce complex shadow patterns of a single object. Without removing shadow, the foreground…
(more)
▼ Shadows in indoor scenarios are usually characterized with multiple light sources that produce complex shadow patterns of a single object. Without removing shadow, the foreground object tends to be erroneously segmented. The inconsistent hue and intensity of shadows make automatic
removal a challenging task. In this thesis, a dynamic thresholding and transfer learning-based method for removing shadows is proposed. The method suppresses light shadows with a dynamically computed threshold and removes dark shadows using an online learning strategy that is built upon a base classifier trained with manually annotated examples and refined with the automatically identified examples in the new videos. Experimental results demonstrate that despite variation of lighting conditions in videos our proposed method is able to adapt to the videos and remove shadows effectively. The sensitivity of shadow detection changes slightly with different confidence levels used in example selection for classifier retraining and high confidence level usually yields better performance with less retraining iterations.
Advisors/Committee Members: Yuan, Xiaohui, Fu, Song, Swigger, Kathleen M..
Subjects/Keywords: shadow removal; background subtraction; computer vision; Video recordings – Data processing.; Motion pictures – Editing – Data processing.; Shades and shadows.
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
7.
Durr, Ryan Christopher.
Discipline Disproportionality in Schools Explored Through
the Eyes of Students.
Degree: EdD, College of Education, 2019, Ashland University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=ashland1556640348910186
► This dissertation addressed the research question, what are the perceptions of African American male high school students in regard to racial disproportionality and disciplinary practices?…
(more)
▼ This dissertation addressed the research question,
what are the perceptions of African American male high school
students in regard to racial disproportionality and disciplinary
practices? This question was addressed through the perspective of
African American male students in a school district in northeast
Ohio. The topic and research question led to literature research
topics such as, the discipline gap, zero tolerance policies, school
to prison pipeline, and restorative justice. The study sought to
address the gap in the literature with obtaining a student voice on
the topics. Several themes emerged from the research. The themes
are referrals and removals, equal treatment, and
background and
reputation. All participants agreed that they had been removed from
a classroom by a classroom teacher for one reason or another. The
participants also agreed that they believed that not all students
in schools are treated equally. Along with this the participants
believed that their
background and reputation played a key role in
the way they were disciplined compared to other students. Some
participants even felt that situations that may have transpired as
early as elementary and middle school have followed them to high
school and still affect them negatively. The research led to
implications for teachers, administrators, and students in
connection to student discipline practices.
Advisors/Committee Members: Alston, Judy (Committee Chair).
Subjects/Keywords: African Americans; Education; Gender; African American; males; discipline; disproportionality; schools; students; removal; equal treatment; background; reputation
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Durr, R. C. (2019). Discipline Disproportionality in Schools Explored Through
the Eyes of Students. (Doctoral Dissertation). Ashland University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ashland1556640348910186
Chicago Manual of Style (16th Edition):
Durr, Ryan Christopher. “Discipline Disproportionality in Schools Explored Through
the Eyes of Students.” 2019. Doctoral Dissertation, Ashland University. Accessed January 25, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=ashland1556640348910186.
MLA Handbook (7th Edition):
Durr, Ryan Christopher. “Discipline Disproportionality in Schools Explored Through
the Eyes of Students.” 2019. Web. 25 Jan 2021.
Vancouver:
Durr RC. Discipline Disproportionality in Schools Explored Through
the Eyes of Students. [Internet] [Doctoral dissertation]. Ashland University; 2019. [cited 2021 Jan 25].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ashland1556640348910186.
Council of Science Editors:
Durr RC. Discipline Disproportionality in Schools Explored Through
the Eyes of Students. [Doctoral Dissertation]. Ashland University; 2019. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ashland1556640348910186
Brigham Young University
8.
Hutchison, Luke Alexander Daysh.
Fast Registration of Tabular Document Images Using the Fourier-Mellin Transform.
Degree: MS, 2004, Brigham Young University
URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1003&context=etd
► Image registration, the process of finding the transformation that best maps one image to another, is an important tool in document image processing. Having properly-aligned…
(more)
▼ Image registration, the process of finding the transformation that best maps one image to another, is an important tool in document image processing. Having properly-aligned microfilm images can help in manual and automated content extraction, zoning, and batch compression of images. An image registration algorithm is presented that quickly identifies the global affine transformation (rotation, scale, translation and/or shear) that maps one tabular document image to another, using the Fourier-Mellin Transform. Each component of the affine transform is recovered independantly from the others, dramatically reducing the parameter space of the problem, and improving upon standard Fourier-Mellin Image Registration (FMIR), which only directly separates translation from the other components. FMIR is also extended to handle shear, as well as different scale factors for each document axis. This registration method deals with all transform components in a uniform way, by working in the frequency domain. Registration is limited to foreground pixels (the document form and printed text) through the introduction of a novel, locally adaptive foreground-background segmentation algorithm, based on the median filter. The background removal algorithm is also demonstrated as a useful tool to remove ambient signal noise during correlation. Common problems with FMIR are eliminated by background removal, meaning that apodization (tapering down to zero at the edge of the image) is not needed for accurate recovery of the rotation parameter, allowing the entire image to be used for registration. An effective new optimization to the median filter is presented. Rotation and scale parameter detection is less susceptible to problems arising from the non-commutativity of rotation and "tiling" (periodicity) than for standard FMIR, because only the regions of the frequency domain directly corresponding to tabular features are used in registration. An original method is also presented for automatically obtaining blank document templates from a set of registered document images, by computing the "pointwise median" of a set of registered documents. Finally, registration is demonstrated as an effective tool for predictive image compression. The presented registration algorithm is reliable and robust, and handles a wider range of transformation types than most document image registration systems (which typically only perform deskewing).
Subjects/Keywords: document image registration; deskewing; transformation reversal; Fourier-Mellin Transform; Fourier transform; rotation; scale; translation; shear; background removal; thresholding; locally-adaptive thresholding; image segmentation; microfilm processing; tabular document images; image processing; family history technology; Computer Sciences
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hutchison, L. A. D. (2004). Fast Registration of Tabular Document Images Using the Fourier-Mellin Transform. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1003&context=etd
Chicago Manual of Style (16th Edition):
Hutchison, Luke Alexander Daysh. “Fast Registration of Tabular Document Images Using the Fourier-Mellin Transform.” 2004. Masters Thesis, Brigham Young University. Accessed January 25, 2021.
https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1003&context=etd.
MLA Handbook (7th Edition):
Hutchison, Luke Alexander Daysh. “Fast Registration of Tabular Document Images Using the Fourier-Mellin Transform.” 2004. Web. 25 Jan 2021.
Vancouver:
Hutchison LAD. Fast Registration of Tabular Document Images Using the Fourier-Mellin Transform. [Internet] [Masters thesis]. Brigham Young University; 2004. [cited 2021 Jan 25].
Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1003&context=etd.
Council of Science Editors:
Hutchison LAD. Fast Registration of Tabular Document Images Using the Fourier-Mellin Transform. [Masters Thesis]. Brigham Young University; 2004. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=1003&context=etd
. 
Open Access Theses and Dissertations
