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arXiv · 1905.04079

Compressing Weight-updates for Image Artifacts Removal Neural Networks

Yat Hong Lam·Alireza Zare·Caglar Aytekin·Francesco Cricri·Jani Lainema·Emre Aksu·Miska Hannuksela
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Abstract

In this paper, we present a novel approach for fine-tuning a decoder-side neural network in the context of image compression, such that the weight-updates are better compressible. At encoder side, we fine-tune a pre-trained artifact removal network on target data by using a compression objective applied on the weight-update. In particular, the compression objective encourages weight-updates which are sparse and closer to quantized values. This way, the final weight-update can be compressed more efficiently by pruning and quantization, and can be included into the encoded bitstream together with the image bitstream of a traditional codec. We show that this approach achieves reconstruction quality which is on-par or slightly superior to a traditional codec, at comparable bitrates. To our knowledge, this is the first attempt to combine image compression and neural network's weight update compression.

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Yat Hong Lam, Alireza Zare, Caglar Aytekin, Francesco Cricri, Jani Lainema, Emre Aksu, Miska Hannuksela. 2019-05-10. Compressing Weight-updates for Image Artifacts Removal Neural Networks. https://arxiv.org/abs/1905.04079

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