Distortion-Controlled Dithering with Reduced Recompression Rate
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866910343829127168 |
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| author | Kasher, Morriel Tinston, Michael Spasojevic, Predrag |
| author_facet | Kasher, Morriel Tinston, Michael Spasojevic, Predrag |
| contents | Dithering is a technique that can improve human perception of low-resolution data by reducing quantization artifacts. In this work we formalize and analytically justify two metrics for quantization artifact prominence, using them to design a novel dithering method for distortion-controlled data compression. We present theoretical entropy calculations for this dither and experimentally validate its performance on a low-rate image compression task. The result is a drastic improvement in the perceptual quality of quantized images with a lower recompression entropy than any state-of-the-art dither technique, achieving 45 points lower PIQUE at the same rate or 40% lower rate at the same PIQUE. The proposed dither is an adaptable tool applicable for use in any lossy compression system, permitting precise control of rate-distortion characteristics for both compression and recompression. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_16447 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Distortion-Controlled Dithering with Reduced Recompression Rate Kasher, Morriel Tinston, Michael Spasojevic, Predrag Signal Processing Dithering is a technique that can improve human perception of low-resolution data by reducing quantization artifacts. In this work we formalize and analytically justify two metrics for quantization artifact prominence, using them to design a novel dithering method for distortion-controlled data compression. We present theoretical entropy calculations for this dither and experimentally validate its performance on a low-rate image compression task. The result is a drastic improvement in the perceptual quality of quantized images with a lower recompression entropy than any state-of-the-art dither technique, achieving 45 points lower PIQUE at the same rate or 40% lower rate at the same PIQUE. The proposed dither is an adaptable tool applicable for use in any lossy compression system, permitting precise control of rate-distortion characteristics for both compression and recompression. |
| title | Distortion-Controlled Dithering with Reduced Recompression Rate |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2402.16447 |