Improved SIFT match for optical satellite images registration by size classification of blob-like structures
Why this work is in the frame
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Bibliographic record
Abstract
Due to high rate of false match and expensive computation cost, the existing scale-invariant feature transform (SIFT) operators are not efficient to register two optical satellite images that have a great spatial resolution difference. Some scale restriction schemes were proposed to reduce the false match of SIFT keypoints and computational cost. However, it is observed that many keypoints are still not correctly matched. This problem often leads to the failure of automatic registration in industrial applications. To solve this problem, the images being registered are normalized to adjust the scale of blob-like structures and to preclude useless blob-like structures. Then blob-like structures are classified according to their physical sizes, and keypoint matching is restricted to matching for the blob-like structures having the same physical sizes. The scale normalization and size classification significantly improve the correct match rate as well as computational cost. Experiments on two pairs of satellite images demonstrate the effectiveness of the proposed method.
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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 | 0.000 |
| 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 it