Transformer-based Learned Image Compression for Joint Decoding and Denoising
2024 PICTURE CODING SYMPOSIUM, PCS 2024(2024)
Natl Yang Ming Chiao Tung Univ
Abstract
This work introduces a Transformer-based image compression system. It has theflexibility to switch between the standard image reconstruction and thedenoising reconstruction from a single compressed bitstream. Instead oftraining separate decoders for these tasks, we incorporate two add-on modulesto adapt a pre-trained image decoder from performing the standard imagereconstruction to joint decoding and denoising. Our scheme adopts a two-prongedapproach. It features a latent refinement module to refine the latentrepresentation of a noisy input image for reconstructing a noise-free image.Additionally, it incorporates an instance-specific prompt generator that adaptsthe decoding process to improve on the latent refinement. Experimental resultsshow that our method achieves a similar level of denoising quality to traininga separate decoder for joint decoding and denoising at the expense of only amodest increase in the decoder's model size and computational complexity.
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Key words
Learned image compression,compressed-domain image denoising,Transformer
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