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Record W4394622711

Automatic image processing based approach for elder pedestrians’ behavior analysis when crossing a street

2017· preprint· fr· W4394622711 on OpenAlexfundno aff
Nabila Mansouri

Bibliographic record

Venuetheses.fr (ABES) · 2017
Typepreprint
Languagefr
FieldEngineering
TopicTraffic and Road Safety
Canadian institutionsnot available
FundersAgence Universitaire de la Francophonie
KeywordsComputer scienceTransport engineeringComputer visionArtificial intelligenceComputer graphics (images)Engineering
DOInot available

Abstract

fetched live from OpenAlex

Le trafic routier est devenu de plus en plus intense. Une telle situation avec le manque de prudence des piétons constituent deux causes majeures de l’augmentation des accidents routiers. En France, 16% des accidents de la route en 2016 impliquent au moins un piéton et chaque année, environ de 800 piétons sont tués dans un accident de la circulation. De plus, la part des plus de 65 ans dans la mortalité piétonne est en hausse de 13% entre 2014 et 2016. Ainsi, par ce projet de thèse nous proposons une approche probabiliste pour inférer le type de comportement (à risque ou sécurisé) des piétons lors de la traversé de la rue. Cette approche se compose de 2 couches principales : Une couche basse, basée sur les techniques de vision par ordinateur, pour la collecte des paramètres des piétons, du trafic et des aménagements urbains et une couche haute, basée sur le Réseau Bayésien (RB), pour l’inférence du type de comportement. Plusieurs contributions et améliorations sont proposées pour la construction d’une telle approche que ce soit au niveau de la couche basse (techniques de détection et de suivi utilisées) ou au niveau de la couche haute (gestion des incertitudes des capteurs de vision et la mise en relation des paramètres hétérogènes et variées).

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.001
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.009
Threshold uncertainty score0.018

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0010.001
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0010.002
Bibliometrics0.0030.001
Science and technology studies0.0000.000
Scholarly communication0.0010.001
Open science0.0010.001
Research integrity0.0010.001
Insufficient payload (model declined to judge)0.0030.003

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.039
GPT teacher head0.291
Teacher spread0.252 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2017
Admission routes1
Has abstractyes

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