论文标题
基于HVS的图像数据的感知颜色压缩
HVS-Based Perceptual Color Compression of Image Data
论文作者
论文摘要
在感知图像编码应用中，主要目标是尽可能减少每个像素（BPP）的位，同时避免重建图像中明显的扭曲。在本文中，我们提出了一种新颖的感知图像编码技术，称为感知色彩压缩（PCC）。 PCC基于与人类视觉系统（HVS）光谱灵敏度有关的新型模型，而Cielab恰好明显的色差（JNCD）。我们利用这种建模来利用HVS在非常相似的波长频段中的感知区分光子（例如，区分特定颜色或看起来相似的不同颜色的非常相似的阴影）中的光子。提出的PCC技术可以与RGB（4：4：4）的图像数据一起使用，该图像数据的各种位深度和空间分辨率。在评估中，我们将提出的PCC技术与一组参考方法进行了比较，包括多功能视频编码（VVC）和高效率视频编码（HEVC），此外还有其他两种最近提出的算法。与所有四种参考技术相比，我们的PCC方法可达到可观的BPP降低，包括与VVC相比（在所有Intra Intra Inter still图像编码模式下）平均降低BPP的52.6％。关于图像感知重建质量，除了一个测试以外，除了一个测试中，PCC在所有测试中都达到了所有测试中SSIM = 0.99的得分。此外，在进行的主观评估评估的75％中获得了MOS = 5。
In perceptual image coding applications, the main objective is to decrease, as much as possible, Bits Per Pixel (BPP) while avoiding noticeable distortions in the reconstructed image. In this paper, we propose a novel perceptual image coding technique, named Perceptual Color Compression (PCC). PCC is based on a novel model related to Human Visual System (HVS) spectral sensitivity and CIELAB Just Noticeable Color Difference (JNCD). We utilize this modeling to capitalize on the inability of the HVS to perceptually differentiate photons in very similar wavelength bands (e.g., distinguishing very similar shades of a particular color or different colors that look similar). The proposed PCC technique can be used with RGB (4:4:4) image data of various bit depths and spatial resolutions. In the evaluations, we compare the proposed PCC technique with a set of reference methods including Versatile Video Coding (VVC) and High Efficiency Video Coding (HEVC) in addition to two other recently proposed algorithms. Our PCC method attains considerable BPP reductions compared with all four reference techniques including, on average, 52.6% BPP reductions compared with VVC (VVC in All Intra still image coding mode). Regarding image perceptual reconstruction quality, PCC achieves a score of SSIM = 0.99 in all tests in addition to a score of MS-SSIM = 0.99 in all but one test. Moreover, MOS = 5 is attained in 75% of subjective evaluation assessments conducted.
