Optimal Wavelet Packets for Characterizing Surface Quality
Bibliographic record
Abstract
We propose an optimal-basis texture classification strategy performed in the wavelet packet domain, in order to characterize quality-related information from a set of images. The proposed method enables one to select the discriminative texture in accordance with class information. The proposed methodology has several stages: feature extraction, feature selection, feature reduction, and classification. In the feature extraction stage, we used wavelet energy signatures obtained from wavelet packet transform. In the feature selection stage, two simple optimal-basis methods (top-down and bottom-up searching) were used to select discriminative signatures with high Fisher’s criterion values. These approaches improve classification accuracy and reduce the number of features used to classify the quality. Our proposed methodology was applied and validated to classify the surface quality of rolled steel sheets. Using this real-world industrial example, we have experimentally shown that the proposed optimal-basis approach is superior to a full-wavelet-packet-based approach, in terms of classification performance and the number of features used.
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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 | 0.004 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".