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arXiv · 2609.31108

Double-stream registration with pyramid fusion for HDR video with alternating exposures

Onofre Martorell·Ivan Pereira-Sánchez·Antoni Fuentes·Antoni Buades
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Abstract

High dynamic range (HDR) video reconstruction from al\-ter\-na\-ting-exposure sequences remains challenging, especially in regions with extreme luminance variation. We propose a novel HDR reconstruction framework based on dual-stream registration and accurate pyramid fusion. Given three consecutive frames, our method computes optical flow directly with the central frame, while introducing a complementary midpoint displacement strategy to handle cases with severe overexposition. A pyramid fusion stage then merges the resulting radiance and LDR images into a final HDR output. Experimental results demonstrate that our approach consistently outperforms state-of-the-art methods.

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Onofre Martorell, Ivan Pereira-Sánchez, Antoni Fuentes, Antoni Buades. 2026-09-25. Double-stream registration with pyramid fusion for HDR video with alternating exposures. https://arxiv.org/abs/2609.31108

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