CMOS imager design for fast centroid readout
Bibliographic record
Abstract
Numerous applications of imaging systems involve the determination of the centroid location of a localized region of high intensity (a "spot") that is easily distinguished from the background. The goal of this work was to tailor the design of a custom CMOS imager to facilitate the centroid-location task. On-pixel circuitry, readout methods, on-chip post-readout processing and other factors were considered in the design process. The 'design process' included system modeling, simulation and experimental validation as well as chip-level design. A triangulation rangefinder instrument was constructed to evaluate imager alternatives. The precision of the range determination is proportional to the precision of the location of the centroid of the image of an optical spot. Range measurements are presented to demonstrate that uncertainty in centroid position, the dominant error source, can be significantly reduced by averaging. A novel CMOS imager design concept is described. Using on-chip processing and a 'pixel-binary', row/column-parallel readout scheme, range values are expected to have an update rate as high as 1 MHz. Key aspects of the chip design are evaluated, especially as they pertain to update rate and the use of on-chip averaging to enhance precision.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
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".