A Quad-Sampling Wide-Dynamic-Range Pulse-Frequency Modulation Pixel
Why this work is in the frame
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Bibliographic record
Abstract
We present a wide dynamic range (WDR) CMOS image sensor structure using the pulse-frequency modulation (PFM) pixel. The proposed pixel achieves a dynamic range (DR) of 124 dB with 8-bit resolution and operates in 60 frames/s. A quad-sampling technique is implemented that successfully reduces the pixel size by only using a 6-bit counter within the pixel. The sampling method incorporates cooperation between the pixel and column circuits to generate an automatically compressed signal that can be directly displayed without post-processing. This design has been verified through the field-programmable gate array (FPGA) implementation with a sample pixel. According to the experimental results, the sensor signal-to-noise ratio (SNR) is mainly limited by the quantization noise of the light-to-frequency conversion. The maximum SNR is 48 dB, and the common SNR dip is successfully avoided. In addition, the achievable array size is determined by all sampling periods and can be of megapixels with appropriate designs.
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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 | 0.001 |
| 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 it