  Burst image processing is becoming increasingly popular in recent years.
However, it is a challenging task since individual burst images undergo
multiple degradations and often have mutual misalignments resulting in ghosting
and zipper artifacts. Existing burst restoration methods usually do not
consider the mutual correlation and non-local contextual information among
burst frames, which tends to limit these approaches in challenging cases.
Another key challenge lies in the robust up-sampling of burst frames. The
existing up-sampling methods cannot effectively utilize the advantages of
single-stage and progressive up-sampling strategies with conventional and/or
recent up-samplers at the same time. To address these challenges, we propose a
novel Gated Multi-Resolution Transfer Network (GMTNet) to reconstruct a
spatially precise high-quality image from a burst of low-quality raw images.
GMTNet consists of three modules optimized for burst processing tasks:
Multi-scale Burst Feature Alignment (MBFA) for feature denoising and alignment,
Transposed-Attention Feature Merging (TAFM) for multi-frame feature
aggregation, and Resolution Transfer Feature Up-sampler (RTFU) to up-scale
merged features and construct a high-quality output image. Detailed
experimental analysis on five datasets validates our approach and sets a
state-of-the-art for burst super-resolution, burst denoising, and low-light
burst enhancement.
