A learned, orthogonality-constrained lattice codebook, optimized end-to-end with Babai rounding and a factored Gaussian mixture rate model, improves rate-distortion performance of neural image codecs over uniform scalar quantization.
Content-oriented learned image compression
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abstract
In recent years, with the development of deep neural networks, end-to-end optimized image compression has made significant progress and exceeded the classic methods in terms of rate-distortion performance. However, most learning-based image compression methods are unlabeled and do not consider image semantics or content when optimizing the model. In fact, human eyes have different sensitivities to different content, so the image content also needs to be considered. In this paper, we propose a content-oriented image compression method, which handles different kinds of image contents with different strategies. Extensive experiments show that the proposed method achieves competitive subjective results compared with state-of-the-art end-to-end learned image compression methods or classic methods.
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Learning Optimal Lattice Vector Quantizers for End-to-end Neural Image Compression
A learned, orthogonality-constrained lattice codebook, optimized end-to-end with Babai rounding and a factored Gaussian mixture rate model, improves rate-distortion performance of neural image codecs over uniform scalar quantization.