Statistical Non-Uniform Sampling of Gabor Wavelet Coefficients for Face Recongnition
Bibliographic record
Abstract
A statistics based, non-uniform sampling of the Gabor wavelet decomposition coefficients for face recognition is presented in this paper. Gabor wavelets are popularly used to decompose face images into their spatial/frequency domains. The derived Gabor coefficients generate an augmented vector, e.g., 40 times larger than the original gray-scale vector. To reduce the dimensionality, uniform sampling of the Gabor coefficients is normally used. In this paper, we propose a non-uniform sampling method of the Gabor coefficients such that the coefficients corresponding to important face features are sampled much finer than those of the other parts of the image. The non-uniform sampling is based on the local statistics of the Gabor coefficients obtained from a set of training images. This adaptation is implemented in a hierarchical fashion; a coarse-to-fine strategy results in multi-level sampling rates. After the samples are obtained, the traditional principal component analysis (PCA) is used to code the samples for the final classification. The experimental results show that the proposed non-uniform sampling of Gabor coefficients outperforms the uniform one and the popular eigenfaces method.
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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".