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Record W4239103514 · doi:10.32920/ryerson.14663670

Image Processing Techniques For Improved Sun Sensor Performance

2021· preprint· en· W4239103514 on OpenAlexaff
Christopher Li

Bibliographic record

Venuenot available
Typepreprint
Languageen
FieldPhysics and Astronomy
TopicAdaptive optics and wavefront sensing
Canadian institutionsToronto Metropolitan University
Fundersnot available
KeywordsMeasure (data warehouse)Kalman filterCalibrationComputer scienceImage sensorComputer visionNoise (video)Artificial intelligenceFilter (signal processing)AlgorithmImage (mathematics)MathematicsStatisticsData mining

Abstract

fetched live from OpenAlex

The behaviour of digital sun-sensors and associated super-resolution algorithms was explored. Using calibration data, a method was proposed to model the peak width of peaks across the image array. Using this with the non-linear least square algorithm gave improved performance across the field-of-view. A test was proposed that would measure precision for small sensor motions. Also, a method of accounting for local bias error was given. The small motion test defined limits at which the sensor detects motion, and the precision test gave metrics to measure how well the sensor renders motion. Finally, an extended kalman filter was developed that used sun-vector measurements, in addition to a new relative measurement. This was tested using a well-defined sensor as well as a generic sensor for which few error data were known. Results indicate that relative measurements only improve performance if random noise is low.

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)0.002
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Methods · Consensus signal: Methods
Teacher disagreement score0.004
Threshold uncertainty score0.000

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0010.002
Meta-epidemiology (narrow)0.0010.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0010.001
Science and technology studies0.0000.000
Scholarly communication0.0010.001
Open science0.0010.000
Research integrity0.0010.001
Insufficient payload (model declined to judge)0.0040.001

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 head0.016
GPT teacher head0.265
Teacher spread0.249 · 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 designBench or experimental
Domainnot available
GenreMethods

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
Published2021
Admission routes1
Has abstractyes

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