HG-Lane: High-Fidelity Generation of Lane Scenes under Adverse Weather and Lighting Conditions without Re-annotation
Pith reviewed 2026-05-15 12:57 UTC · model grok-4.3
The pith
HG-Lane generates photorealistic lane scenes in adverse weather and lighting without re-annotation, enabling better training of detection models.
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
Core claim
HG-Lane is a high-fidelity generation framework that produces lane scenes under adverse weather and lighting conditions while preserving accurate lane geometry from source images, eliminating the need for re-annotation. When used to augment training data, this leads to substantial improvements in lane detection performance across multiple categories on a new benchmark containing 30,000 images.
What carries the argument
The HG-Lane high-fidelity generation framework that synthesizes adverse-condition images while keeping original lane annotations intact.
Load-bearing premise
The synthetic images must accurately mimic real adverse weather effects on lane visibility while exactly preserving the lane positions and shapes from the original annotations.
What would settle it
Measuring lane detection performance on a separate collection of real-world images captured in rain, snow, or fog; if accuracy does not improve over models trained only on standard datasets, the value of the generated data is refuted.
Figures
read the original abstract
Lane detection is a crucial task in autonomous driving, as it helps ensure the safe operation of vehicles. However, existing datasets such as CULane and TuSimple contain relatively limited data under extreme weather conditions, including rain, snow, and fog. As a result, detection models trained on these datasets often become unreliable in such environments, which may lead to serious safety-critical failures on the road. To address this issue, we propose HG-Lane, a High-fidelity Generation framework for Lane Scenes under adverse weather and lighting conditions without requiring re-annotation. Based on this framework, we further construct a benchmark that includes adverse weather and lighting scenarios, containing 30,000 images. Experimental results demonstrate that our method consistently and significantly improves the performance of existing lane detection networks. For example, using the state-of-the-art CLRNet, the overall mF1 score on our benchmark increases by 20.87 percent. The F1@50 score for the overall, normal, snow, rain, fog, night, and dusk categories increases by 19.75 percent, 8.63 percent, 38.8 percent, 14.96 percent, 26.84 percent, 21.5 percent, and 12.04 percent, respectively. The code and dataset are available at: https://github.com/zdc233/HG-Lane.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The paper proposes HG-Lane, a high-fidelity generation framework for lane scenes under adverse weather and lighting conditions that preserves original annotations without re-labeling. It constructs a 30,000-image synthetic benchmark covering snow, rain, fog, night, and dusk scenarios, and reports that augmenting training data with these images yields consistent gains for lane detectors (e.g., +20.87% overall mF1 for CLRNet, with per-category F1@50 lifts ranging from 8.63% to 38.8%). Code and dataset are released.
Significance. If the generated images prove photorealistic and geometrically faithful, the approach offers a practical route to data augmentation for safety-critical lane detection without costly re-annotation, directly targeting the scarcity of adverse-condition data in CULane and TuSimple. Releasing the benchmark and code strengthens reproducibility and enables follow-on work.
major comments (2)
- [Experimental results / abstract] The headline performance claims (e.g., +20.87% mF1 for CLRNet) are measured exclusively on the authors' 30k-image synthetic benchmark generated by HG-Lane itself. No cross-domain experiments are reported that train on HG-Lane-augmented data and evaluate on held-out real adverse-weather splits from CULane or TuSimple, leaving the domain-gap assumption untested.
- [Abstract and §4] The abstract and results sections provide no quantitative validation of photorealism (e.g., FID scores against real adverse captures, perceptual studies, or geometry-preservation metrics such as lane-marking alignment error) beyond the downstream detector gains on synthetic data.
minor comments (1)
- [Method] Clarify in the method section how the weather/lighting control parameters are sampled to ensure diversity without introducing annotation drift.
Simulated Author's Rebuttal
We thank the referee for the constructive comments. We address each major point below, clarifying our evaluation choices while committing to revisions that strengthen the evidence for photorealism and cross-domain utility.
read point-by-point responses
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Referee: [Experimental results / abstract] The headline performance claims (e.g., +20.87% mF1 for CLRNet) are measured exclusively on the authors' 30k-image synthetic benchmark generated by HG-Lane itself. No cross-domain experiments are reported that train on HG-Lane-augmented data and evaluate on held-out real adverse-weather splits from CULane or TuSimple, leaving the domain-gap assumption untested.
Authors: Our primary results focus on the HG-Lane benchmark because it provides a controlled, large-scale testbed for adverse conditions where real annotated data remains scarce; the consistent per-category gains (e.g., +38.8% F1@50 on snow) directly demonstrate the value of the generated data for the target task. We acknowledge that explicit cross-domain transfer results would further support generalization. In the revised manuscript we will add experiments that augment the original CULane training set with HG-Lane images and evaluate on the held-out real adverse-weather subsets of both CULane and TuSimple. revision: yes
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Referee: [Abstract and §4] The abstract and results sections provide no quantitative validation of photorealism (e.g., FID scores against real adverse captures, perceptual studies, or geometry-preservation metrics such as lane-marking alignment error) beyond the downstream detector gains on synthetic data.
Authors: Downstream lane-detection gains serve as a task-specific proxy for image utility, especially given that lane annotations are exactly preserved. Nevertheless, we agree that direct metrics would increase confidence in photorealism and geometric fidelity. In the revision we will report FID scores between HG-Lane images and real adverse-weather captures from CULane, include a small-scale human perceptual study, and add a lane-marking alignment error metric computed on the preserved ground-truth labels. revision: yes
Circularity Check
No circularity; empirical gains measured on independently generated benchmark
full rationale
The paper presents an algorithmic generation framework (HG-Lane) that produces synthetic adverse-weather lane images while preserving original annotations, then reports standard mF1/F1 improvements when detectors are trained on mixes including these images and evaluated on the 30k-image benchmark. No equations, uniqueness theorems, or self-citations are invoked to derive the performance numbers; the gains are obtained by direct training and testing on held-out generated data using off-the-shelf metrics. This is a standard empirical pipeline with no reduction of claimed results to inputs by construction. The photorealism assumption for real-world transfer is an external validity concern, not a circularity in the derivation chain.
Axiom & Free-Parameter Ledger
free parameters (1)
- weather and lighting control parameters
Lean theorems connected to this paper
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IndisputableMonolith/Cost/FunctionalEquation.leanwashburn_uniqueness_aczel unclear?
unclearRelation between the paper passage and the cited Recognition theorem.
HG-Lane is a dual-stage, control-guided diffusion framework that generates lane images with diverse weather conditions and illumination conditions while preserving lane geometry... C0 = (A ⊙ M) ⊕ E
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IndisputableMonolith/Foundation/RealityFromDistinction.leanreality_from_one_distinction unclear?
unclearRelation between the paper passage and the cited Recognition theorem.
We propose HG-Lane, a High-fidelity Generation framework for Lane Scenes under adverse weather and lighting conditions without requiring re-annotation... 30,000 images... +20.87% mF1 on CLRNet
What do these tags mean?
- matches
- The paper's claim is directly supported by a theorem in the formal canon.
- supports
- The theorem supports part of the paper's argument, but the paper may add assumptions or extra steps.
- extends
- The paper goes beyond the formal theorem; the theorem is a base layer rather than the whole result.
- uses
- The paper appears to rely on the theorem as machinery.
- contradicts
- The paper's claim conflicts with a theorem or certificate in the canon.
- unclear
- Pith found a possible connection, but the passage is too broad, indirect, or ambiguous to say the theorem truly supports the claim.
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1 HG-Lane: High-Fidelity Generation of Lane Scenes under Adverse Weather and Lighting Conditions without Re-annotation Supplementary Material A. Visualization in Real-World In Figure 7, a comparison is presented between the samples generated by our framework and real-world samples. We can see that the realism of images generated by HG-Lane is very close t...
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