TACTIC: Joint Rate-Distortion-Accuracy Optimisation for Low Bitrate Compression

Nikolina Kubiak; Simon Hadfield

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arXiv · 2109.10658

TACTIC: Joint Rate-Distortion-Accuracy Optimisation for Low Bitrate Compression

Nikolina Kubiak·Simon Hadfield

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Abstract

We present TACTIC: Task-Aware Compression Through Intelligent Coding. Our lossy compression model learns based on the rate-distortion-accuracy trade-off for a specific task. By considering what information is important for the follow-on problem, the system trades off visual fidelity for good task performance at a low bitrate. When compared against JPEG at the same bitrate, our approach is able to improve the accuracy of ImageNet subset classification by 4.5%. We also demonstrate the applicability of our approach to other problems, providing a 3.4% accuracy and 4.9% mean IoU improvements in performance over task-agnostic compression for semantic segmentation.

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Nikolina Kubiak, Simon Hadfield. 2021-09-22. TACTIC: Joint Rate-Distortion-Accuracy Optimisation for Low Bitrate Compression. https://arxiv.org/abs/2109.10658

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