$k$-means on Positive Definite Matrices, and an Application to Clustering in Radar Image Sequences

Fuente: arXiv

Saved in:

Bibliographic Details
Main Authors:	Fryer, Daniel, Nguyen, Hien, Castellazzi, Pascal
Format:	Preprint
Published:	2020
Subjects:	Machine Learning Image and Video Processing
Online Access:	Acceder al recurso
Tags:	Add Tag No Tags, Be the first to tag this record!

End-to-end learned Lossy Dynamic Point Cloud Attribute Compression
by: Nguyen, Dat Thanh, et al.
Published: (2024)

Time Series Generative Learning with Application to Brain Imaging Analysis
by: Li, Zhenghao, et al.
Published: (2024)

PET-TURTLE: Deep Unsupervised Support Vector Machines for Imbalanced Data Clusters
by: Cavazos, Javier Salazar
Published: (2026)

Deep Temporal Sequence Classification and Mathematical Modeling for Cell Tracking in Dense 3D Microscopy Videos of Bacterial Biofilms
by: Toma, Tanjin Taher, et al.
Published: (2024)

Lossless Point Cloud Geometry and Attribute Compression Using a Learned Conditional Probability Model
by: Nguyen, Dat Thanh, et al.
Published: (2023)

Machine Learning Applications in Spine Biomechanics
by: Ghezelbash, Farshid, et al.
Published: (2024)

Conformalized Generative Bayesian Imaging: An Uncertainty Quantification Framework for Computational Imaging
by: Ekmekci, Canberk, et al.
Published: (2025)

Cluster-Segregate-Perturb (CSP): A Model-agnostic Explainability Pipeline for Spatiotemporal Land Surface Forecasting Models
by: Verma, Tushar, et al.
Published: (2024)

Improving Virtual Contrast Enhancement using Longitudinal Data
by: Fayolle, Pierre, et al.
Published: (2025)

Joint Segmentation and Image Reconstruction with Error Prediction in Photoacoustic Imaging using Deep Learning
by: Shang, Ruibo, et al.
Published: (2024)

Federated Multilinear Principal Component Analysis with Applications in Prognostics
by: Zhou, Chengyu, et al.
Published: (2023)

Multi-modal deformable image registration using untrained neural networks
by: Nguyen, Quang Luong Nhat, et al.
Published: (2024)

Three-Dimensional, Multimodal Synchrotron Data for Machine Learning Applications
by: Green, Calum, et al.
Published: (2024)

Undersampled Phase Retrieval with Image Priors
by: Ducotterd, Stanislas, et al.
Published: (2025)

Comparative Analysis of ImageNet Pre-Trained Deep Learning Models and DINOv2 in Medical Imaging Classification
by: Huang, Yuning, et al.
Published: (2024)

CycleGAN Models for MRI Image Translation
by: Czobit, Cassandra, et al.
Published: (2023)

Distilling Knowledge for Designing Computational Imaging Systems
by: Suarez-Rodriguez, Leon, et al.
Published: (2025)

Multilook Coherent Imaging: Theoretical Guarantees and Algorithms
by: Chen, Xi, et al.
Published: (2025)

CMISR: Circular Medical Image Super-Resolution
by: Li, Honggui, et al.
Published: (2023)

Radiomics in Medical Imaging: Methods, Applications, and Challenges
by: Neha, Fnu, et al.
Published: (2026)

Trustworthy Image Super-Resolution via Generative Pseudoinverse
by: Floros, Andreas, et al.
Published: (2025)

Efficient Deep Model-Based Optoacoustic Image Reconstruction
by: Dehner, Christoph, et al.
Published: (2024)

MACAW: A Causal Generative Model for Medical Imaging
by: Vigneshwaran, Vibujithan, et al.
Published: (2024)

Flexible Mixed Precision Quantization for Learned Image Compression
by: Hossain, Md Adnan Faisal, et al.
Published: (2025)

Physics-Embedded Feature Learning for AI in Medical Imaging
by: Das, Pulock, et al.
Published: (2026)

Theoretical Bound-Guided Hierarchical VAE for Neural Image Codecs
by: Zhang, Yichi, et al.
Published: (2024)

Gaussian Surrogates for Poisson Imaging: Some Theoretical and Empirical Results
by: Spitzer, Alexandra, et al.
Published: (2026)

A Reconfigurable Convolution-in-Pixel CMOS Image Sensor Architecture
by: Song, Ruibing, et al.
Published: (2021)

Robustness and accuracy of mean opinion scores with hard and soft outlier detection
by: Saupe, Dietmar, et al.
Published: (2025)

Physics-Guided Diffusion Priors for Multi-Slice Reconstruction in Scientific Imaging
by: Valdy, Laurentius, et al.
Published: (2025)

SNR and Resource Adaptive Deep JSCC for Distributed IoT Image Classification
by: Waqas, Ali, et al.
Published: (2025)

AI Alignment in Medical Imaging: Unveiling Hidden Biases Through Counterfactual Analysis
by: Ma, Haroui, et al.
Published: (2025)

Brain Storm Optimization Based Swarm Learning for Diabetic Retinopathy Image Classification
by: Qu, Liang, et al.
Published: (2024)

Machine Learning Derived Blood Input for Dynamic PET Images of Rat Heart
by: Debsarkar, Shubhrangshu, et al.
Published: (2025)

DiSC-Med: Diffusion-based Semantic Communications for Robust Medical Image Transmission
by: Guo, Fupei, et al.
Published: (2025)

Deep Image Priors for Magnetic Resonance Fingerprinting with pretrained Bloch-consistent denoising autoencoders
by: Mayo, Perla, et al.
Published: (2024)

A Fourier-Based Global Denoising Model for Smart Artifacts Removing of Microscopy Images
by: Zhao, Huanhuan, et al.
Published: (2025)

Leveraging Second-Order Curvature for Efficient Learned Image Compression: Theory and Empirical Evidence
by: Zhang, Yichi, et al.
Published: (2026)

Bi-level Guided Diffusion Models for Zero-Shot Medical Imaging Inverse Problems
by: Askari, Hossein, et al.
Published: (2024)

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

Environment & details:

GET Data empty

POST Data empty

Files empty

Key	Value
VUFIND_SESSION	"e4257bc30115d3e1329f8c8f37de1cec"
ui	"standard"
language	"en"

Session

Key	Value
__Laminas	array:2 [`"_REQUEST_ACCESS_TIME" => 1790887795.5356 "_VALID" => array:1 [ "Laminas\Session\Validator\Id" => "e4257bc30115d3e1329f8c8f37de1cec" ]`]
SessionState	Laminas\Stdlib\ArrayObject {#938}
FlashMessenger	Laminas\Stdlib\ArrayObject {#1433}
SessionHelper	Laminas\Stdlib\ArrayObject {#1759}

Server/Request Data

Key	Value
REDIRECT_VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
REDIRECT_HTTPS	"on"
REDIRECT_SSL_TLS_SNI	"info.umar.mx"
REDIRECT_STATUS	"200"
VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
HTTPS	"on"
SSL_TLS_SNI	"info.umar.mx"
HTTP_ACCEPT	"/"
HTTP_USER_AGENT	"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
HTTP_COOKIE	"VUFIND_SESSION=e4257bc30115d3e1329f8c8f37de1cec; ui=standard; language=en"
HTTP_ACCEPT_ENCODING	"gzip, br, zstd, deflate"
HTTP_HOST	"info.umar.mx"
PATH	"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/snap/bin"
SERVER_SIGNATURE	"<address>Apache/2.4.66 (Ubuntu) Server at info.umar.mx Port 443</address>\n"
SERVER_SOFTWARE	"Apache/2.4.66 (Ubuntu)"
SERVER_NAME	"info.umar.mx"
SERVER_ADDR	"200.23.222.19"
SERVER_PORT	"443"
REMOTE_ADDR	"216.73.217.142"
DOCUMENT_ROOT	"/usr/local/vufind/public"
REQUEST_SCHEME	"https"
CONTEXT_PREFIX	""
CONTEXT_DOCUMENT_ROOT	"/usr/local/vufind/public"
SERVER_ADMIN	"admin@localhost"
SCRIPT_FILENAME	"/usr/local/vufind/public/index.php"
REMOTE_PORT	"60768"
REDIRECT_URL	""" /Record/\n arxiv_https___arxiv_org_abs_2008_03454/Similar """
GATEWAY_INTERFACE	"CGI/1.1"
SERVER_PROTOCOL	"HTTP/1.1"
REQUEST_METHOD	"GET"
QUERY_STRING	""
REQUEST_URI	"/Record/%0Aarxiv_https___arxiv_org_abs_2008_03454/Similar"
SCRIPT_NAME	"/index.php"
PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1790887795.5199
REQUEST_TIME	1790887795

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

Environment & details:

GET Data empty

POST Data empty

Files empty

Key	Value
VUFIND_SESSION	"e4257bc30115d3e1329f8c8f37de1cec"
ui	"standard"
language	"en"

Session

Key	Value
__Laminas	array:2 [`"_REQUEST_ACCESS_TIME" => 1790887795.5356 "_VALID" => array:1 [ "Laminas\Session\Validator\Id" => "e4257bc30115d3e1329f8c8f37de1cec" ]`]
SessionState	Laminas\Stdlib\ArrayObject {#938}
FlashMessenger	Laminas\Stdlib\ArrayObject {#1433}
SessionHelper	Laminas\Stdlib\ArrayObject {#1759}

Server/Request Data

Key	Value
REDIRECT_VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
REDIRECT_HTTPS	"on"
REDIRECT_SSL_TLS_SNI	"info.umar.mx"
REDIRECT_STATUS	"200"
VUFIND_LOCAL_DIR	"/usr/local/vufind/local"
HTTPS	"on"
SSL_TLS_SNI	"info.umar.mx"
HTTP_ACCEPT	"/"
HTTP_USER_AGENT	"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)"
HTTP_COOKIE	"VUFIND_SESSION=e4257bc30115d3e1329f8c8f37de1cec; ui=standard; language=en"
HTTP_ACCEPT_ENCODING	"gzip, br, zstd, deflate"
HTTP_HOST	"info.umar.mx"
PATH	"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/snap/bin"
SERVER_SIGNATURE	"<address>Apache/2.4.66 (Ubuntu) Server at info.umar.mx Port 443</address>\n"
SERVER_SOFTWARE	"Apache/2.4.66 (Ubuntu)"
SERVER_NAME	"info.umar.mx"
SERVER_ADDR	"200.23.222.19"
SERVER_PORT	"443"
REMOTE_ADDR	"216.73.217.142"
DOCUMENT_ROOT	"/usr/local/vufind/public"
REQUEST_SCHEME	"https"
CONTEXT_PREFIX	""
CONTEXT_DOCUMENT_ROOT	"/usr/local/vufind/public"
SERVER_ADMIN	"admin@localhost"
SCRIPT_FILENAME	"/usr/local/vufind/public/index.php"
REMOTE_PORT	"60768"
REDIRECT_URL	""" /Record/\n arxiv_https___arxiv_org_abs_2008_03454/Similar """
GATEWAY_INTERFACE	"CGI/1.1"
SERVER_PROTOCOL	"HTTP/1.1"
REQUEST_METHOD	"GET"
QUERY_STRING	""
REQUEST_URI	"/Record/%0Aarxiv_https___arxiv_org_abs_2008_03454/Similar"
SCRIPT_NAME	"/index.php"
PHP_SELF	"/index.php"
REQUEST_TIME_FLOAT	1790887795.5199
REQUEST_TIME	1790887795

Environment Variables empty

Registered Handlers

0. Whoops\Handler\PrettyPageHandler

Similar Items

Similar Items

Environment & details:

Environment & details: