Writing study: Spatially-Varying Autofocus
← ICCV 2025 oral writing corpus
Yingsi Qin, Aswin C. Sankaranarayanan, Matthew O'Toole · Official ICCV 2025 oral record
Figure, table and section ledger
Editorial contribution type: Efficiency, inference & systems (primary).
Layout extraction, not a required paper template. Counts are distinct caption labels; a multi-panel figure counts once. Section spans are estimated from heading positions, including floats and whitespace. Method and limitations.
- Canonical PDF
- 10 physical pages
- Before references / appendix
- ≈ 8.08 page-equivalents
- Main figures / tables
- 12 / 1
- Attached appendix figures / tables
- 0 / 0
- Attached appendix span
- No boundary detected; not assumed zero
Extraction notes: No attached appendix boundary detected. Zero means no recognized caption, not independently verified absence.
Section-by-section lengths and source pages
The title/abstract/front matter precede the first numbered heading. A span ends at the next detected top-level heading, not at the last sentence; end-page whitespace is included. References and statements are listed separately. These are not measurements of text-only or artwork area.
| Top-level heading | Starts on PDF page | Estimated span | Share of entire PDF |
|---|---|---|---|
| 1. Introduction | 1 | ≈ 1.25 pp. | 12.5% |
| 2. Related Work | 2 | ≈ 1.04 pp. | 10.4% |
| 3. The Split-Lohmann Computational Lens | 3 | ≈ 0.34 pp. | 3.4% |
| 4. Spatially-Varying Autofocus | 4 | ≈ 1.69 pp. | 16.9% |
| 5. Results | 5 | ≈ 2.48 pp. | 24.8% |
| 6. Discussion | 8 | ≈ 0.65 pp. | 6.5% |
| 7. Conclusion | 8 | ≈ 0.22 pp. | 2.2% |
| References | 9 | ≈ 1.92 pp. | 19.2% |
All detected figure and table locations
Main text
Attached appendix
No recognized caption labels.
Argument and organization
- 1 Introduction; 2 Related Work
Contrasts optical focus control with computational all-in-focus reconstruction and states a light-throughput limitation early.
- 3 The Split-Lohmann Computational Lens; 4 Spatially-Varying Autofocus
Derives programmable focus and adapts contrast- and phase-detection feedback to spatial regions.
- 5 Results; 6 Discussion; 7 Conclusion
Connects prototype photographs, capture-count quality curves and spatial resolution to aperture/aberration constraints.
Problem, claim and contribution
The claimed distinction is an optically captured all-in-focus image with no post-capture reconstruction, not an absence of computation in autofocus.
Figure 1, physical p.1; Table 1, p.2 · Main paper
Argument and section order
The optical mechanism is explained before the feedback algorithms, keeping hardware programmability distinct from estimating the appropriate focus pattern.
Sections 3–4, pp.3–5 · Main paper
Figures, captions and visual explanation
The contrast-search diagram links interval refinement to actual captured search images; final quality and MTF plots expose measurement count and resolution separately.
Figure 3, p.4; Figures 11–12, p.8 · Main paper
Tables, comparisons and evidence
Qualitative comparisons disclose 10 contrast-based captures, four phase-based captures, 20 focal-stack captures and one focal-sweep capture; quantitative image-quality curves average two named scenes.
Section 5, p.6; Figure 11, p.8 · Main paper
Appendix and reproducibility
Autofocus pseudocode, prototype details, dual-pixel geometry and aperture calculations are assigned to the supplemental PDF, which was not inspected.
Sections 4–6, pp.4–6,8 · Main paper
Clarity and writing conventions
The introduction discloses at most one-eighth incident-light transmission, while discussion explains additional focus-dependent aperture loss.
Limitation paragraph, p.2; Section 6, p.8 · Main paper
What to reuse—and what not to infer
Transferable lesson: A computational-imaging paper benefits from a clean separation of optical capture, control computation and post-processing, with each baseline’s acquisition budget shown.
Boundary: Two images are a minimum opportunity, not the capture count used for all reported results. The laboratory prototype has significant light loss and focus-dependent aperture effects; selected scenes and test targets do not validate unrestricted scene geometry, motion or microscopy deployment.
Apply this lesson using the argument and evidence worksheet.
Inspection record and sources
- Checked
- 2026-10-07
- Reading status
- Writing-focused manuscript scan + selected visuals inspected
- Main text
- Writing-oriented scan across the main manuscript, physical PDF pp.1–8, covering framing, section progression, method explanations, captions, comparison protocols and concluding scope; reference boundary checked. Selected full-page rasters were inspected. Not exhaustive line-by-line reading, proof verification or experimental reproduction.
- Appendix / supplement
- Main-paper appendix/supplement references were checked. A separate supplementary source is linked in the inventory but was not retrieved or inspected; its contents are not included in the reading or visual-page counts.
- Visually inspected PDF pages
- 4, 8
This is a writing-focused scan of the manuscript and the stated supplementary scope: framing, organization, visual explanation, evidence presentation and wording. It is not a line-by-line proof audit, reproduction of results or exhaustive scientific review.