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Decoupling Compression and Demixing: A Modular Penalized Matrix Decomposition Framework for Calcium and Voltage Imaging Data
Decoupling Compression and Demixing: A Modular Penalized Matrix Decomposition Framework fo...
Decoupling Compression and Demixing: A Modular Penalized Matrix Decomposition Framework for Calcium and Voltage Imaging Data

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105200
ISBN  
9798297617247
DDC  
310
저자명  
Kinsella, Ian August.
서명/저자  
Decoupling Compression and Demixing: A Modular Penalized Matrix Decomposition Framework for Calcium and Voltage Imaging Data
발행사항  
[Sl] : Columbia University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
221 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
주기사항  
Advisor: Paninski, Liam.
학위논문주기  
Thesis (Ph.D.)--Columbia University, 2025.
초록/해제  
요약Calcium and voltage imaging produce high-dimensional fluorescence movies in which neural activity must be recovered from low-SNR measurements and is often obscured by structured backgrounds and acquisition artifacts. The objective is to recover and demix signals attributable to distinct sources. Most pipelines attempt this in a single stage; in practice, joint formulations are sensitive to initialization and hyperparameters and are computationally demanding. This thesis develops a modular alternative: perform compression and denoising first to obtain a compact, noise-reduced representation, and then demix on that representation.First, the thesis introduces a patch-wise Penalized Matrix Decomposition (PMD) that constructs a structured, low-rank representation aligned with characteristics shared across modalities, without requiring modality-specific assumptions. Framing the initial stage as signal approximation rather than source separation yields robust compression and denoising without parameter tuning and compares favorably with standard dimensionality reduction baselines. This positions PMD as a general-purpose tool and a foundation from which to revisit the design of demixing.Second, the thesis turns to demixing through targeted case studies, using the PMD representation as the substrate for redesigned, modality-adapted algorithms. Working directly in the compressed space improves conditioning, enables more stable and data-driven initialization, and reduces computational cost. These designs are translated into usable software and reproducible pipelines, and deployed in collaborative settings, illustrating how the modular framework supports scalable, routine analysis.
일반주제명  
Statistics
일반주제명  
Neurosciences
일반주제명  
Computer science
일반주제명  
Medical imaging
키워드  
Calcium imaging
키워드  
Machine learning
키워드  
Matrix factorization
키워드  
Voltage imaging
키워드  
Neural activity
기타저자  
Columbia University Statistics
기본자료저록  
Dissertations Abstracts International. 87-04B.
전자적 위치 및 접속  
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■1001  ▼aKinsella,  Ian  August.
■24510▼aDecoupling  Compression  and  Demixing:  A  Modular  Penalized  Matrix  Decomposition  Framework  for  Calcium  and  Voltage  Imaging  Data
■260    ▼a[Sl]▼bColumbia  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a221  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-04,  Section:  B.
■500    ▼aAdvisor:  Paninski,  Liam.
■5021  ▼aThesis  (Ph.D.)--Columbia  University,  2025.
■520    ▼aCalcium  and  voltage  imaging  produce  high-dimensional  fluorescence  movies  in  which  neural  activity  must  be  recovered  from  low-SNR  measurements  and  is  often  obscured  by  structured  backgrounds  and  acquisition  artifacts.  The  objective  is  to  recover  and  demix  signals  attributable  to  distinct  sources.  Most  pipelines  attempt  this  in  a  single  stage;  in  practice,  joint  formulations  are  sensitive  to  initialization  and  hyperparameters  and  are  computationally  demanding.  This  thesis  develops  a  modular  alternative:  perform  compression  and  denoising  first  to  obtain  a  compact,  noise-reduced  representation,  and  then  demix  on  that  representation.First,  the  thesis  introduces  a  patch-wise  Penalized  Matrix  Decomposition  (PMD)  that  constructs  a  structured,  low-rank  representation  aligned  with  characteristics  shared  across  modalities,  without  requiring  modality-specific  assumptions.  Framing  the  initial  stage  as  signal  approximation  rather  than  source  separation  yields  robust  compression  and  denoising  without  parameter  tuning  and  compares  favorably  with  standard  dimensionality  reduction  baselines.  This  positions  PMD  as  a  general-purpose  tool  and  a  foundation  from  which  to  revisit  the  design  of  demixing.Second,  the  thesis  turns  to  demixing  through  targeted  case  studies,  using  the  PMD  representation  as  the  substrate  for  redesigned,  modality-adapted  algorithms.  Working  directly  in  the  compressed  space  improves  conditioning,  enables  more  stable  and  data-driven  initialization,  and  reduces  computational  cost.  These  designs  are  translated  into  usable  software  and  reproducible  pipelines,  and  deployed  in  collaborative  settings,  illustrating  how  the  modular  framework  supports  scalable,  routine  analysis.
■590    ▼aSchool  code:  0054.
■650  4▼aStatistics
■650  4▼aNeurosciences
■650  4▼aComputer  science
■650  4▼aMedical  imaging
■653    ▼aCalcium  imaging
■653    ▼aMachine  learning
■653    ▼aMatrix  factorization
■653    ▼aVoltage  imaging
■653    ▼aNeural  activity
■690    ▼a0463
■690    ▼a0317
■690    ▼a0984
■690    ▼a0574
■690    ▼a0800
■71020▼aColumbia  University▼bStatistics.
■7730  ▼tDissertations  Abstracts  International▼g87-04B.
■790    ▼a0054
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359701▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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