OptVQ uses Sinkhorn optimal transport instead of nearest-neighbor search for vector quantization, achieving full codebook utilization and improved image reconstruction.
Efficient-vqgan: To- wards high-resolution image generation with efficient vision transformers
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Preventing Local Pitfalls in Vector Quantization via Optimal Transport
OptVQ uses Sinkhorn optimal transport instead of nearest-neighbor search for vector quantization, achieving full codebook utilization and improved image reconstruction.