An Adaptive Pansharpening Method by Using Weighted Least Squares Filter
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Bibliographic record
Abstract
Multisensor image fusion or pansharpening aims to sharpen a multispectral (MS) image by integrating the detail map derived from a panchromatic (Pan) image. The intensity-hue-saturation (IHS)-based methods are well adopted in pansharpening applications. However, the pansharpened MS images by IHS-based methods usually suffer from serious spectral distortions and local artifacts due to the mismatch between the estimated detail map and its ground truth. To overcome these defects, we propose a weighted least squares (WLS)-filter-based method in this letter. Different from existing IHS-based methods, the proposed method eliminates the influence of the low-frequency components of the Pan and MS images with the WLS filter. Moreover, the derived detail map is further refined based on the spectral signatures for different bands of the MS image. We test the proposed method on various satellites data; the experimental results demonstrate that the proposed method performs well in both spectral and spatial qualities.
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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