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LatentHDR: Decoupling Exposure from Diffusion via Conditional Latent-to-Latent Mapping for Text/Image-to-Panoramic HDR

Summary

LatentHDR proposes a framework that decouples scene generation from exposure modeling in latent space. A pretrained diffusion backbone produces a single coherent scene representation, while a lightweight conditional latent-to-latent head maps it to exposure-specific representations, enabling single-pass generation of a dense, structurally consistent exposure stack. This eliminates multi-pass diffusion, ensures cross-exposure alignment, and reduces computation by an order of magnitude. It supports both text- and image-conditioned HDR generation for perspective and panoramic scenes, achieving state-of-the-art dynamic range on SI-HDR benchmark.

SourcearXiv Computer VisionAuthor: Pedram Fekri, WenChen Li, William Chen, Peter Altamirano
LatentHDR: Decoupling Exposure from Diffusion via Conditional Latent-to-Latent Mapping for Text/Image-to-Panoramic HDR
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[2605.11115] LatentHDR: Decoupling Exposure from Diffusion via Conditional Latent-to-Latent Mapping for Text/Image-to-Panoramic HDR

[Submitted on 11 May 2026]

Title:LatentHDR: Decoupling Exposure from Diffusion via Conditional Latent-to-Latent Mapping for Text/Image-to-Panoramic HDR

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Abstract:High Dynamic Range (HDR) generation remains challenging for generative models, which are largely limited to low dynamic range outputs. Recent diffusionbased approaches approximate HDR by generating multiple exposure-conditioned samples, incurring high computational cost and structural inconsistencies across exposures. We propose LatentHDR, a framework that decouples scene generation from exposure modeling in latent space. A pretrained diffusion backbone produces a single coherent scene representation, while a lightweight conditional latent to-latent head deterministically maps it to exposure-specific representations. This enables the generation of a dense, structurally consistent exposure stack in a single pass. This design eliminates multi-pass diffusion, ensures cross-exposure alignment, and enables scalable HDR synthesis. LatentHDR supports both textand image-conditioned HDR generation for perspective and panoramic scenes. Experiments on synthetic data and the SI-HDR benchmark show that LatentHDR achieves state-of-the-art dynamic range with competitive perceptual quality, while reducing computation by an order of magnitude. Our results demonstrate that high-quality HDR generation can be achieved through structured latent modeling, challenging the need for stochastic multi-exposure generation.

Subjects:

Computer Vision and Pattern Recognition (cs.CV); Graphics (cs.GR); Machine Learning (cs.LG)

Cite as: arXiv:2605.11115 [cs.CV]

(or arXiv:2605.11115v1 [cs.CV] for this version)

https://doi.org/10.48550/arXiv.2605.11115

arXiv-issued DOI via DataCite (pending registration)

Submission history

From: Pedram Fekri [view email] [v1] Mon, 11 May 2026 18:24:04 UTC (5,557 KB)

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Key points and analysis

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Key points

  • Decouples exposure from diffusion in latent space, eliminating multi-pass diffusion.
  • Generates a dense, structurally consistent exposure stack in a single forward pass.
  • Reduces computation by an order of magnitude compared to prior diffusion methods.
  • Supports text- and image-conditioned HDR generation for both perspective and panoramic scenes.

Highlights and analysis are generated automatically and may contain errors. Check the original source.