Acta Optica Sinica, Volume. 41, Issue 12, 1210001(2021)

Foveated JND Model Based on Stereo Vision and Its Application in Image Compression with Hardware Implementation

Yuan Ji1,2, Zhijie Zheng1、*, hao Wu1, Yin Zhang1, Wendong Chen2, and Tingzhou Mu2
Author Affiliations
  • 1Microelectronics Research and Development Center, Shanghai University, Shanghai 200072, China
  • 2School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China
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    The traditional two-dimensional JND (Just Noticeable Difference) model can only estimate the minimum noticeable difference of the planar image, and is not completely suitable for the large field of view image under virtual stereo vision. First, according to the visual characteristics of the human eye, corresponding binocular observation experiments are designed for the four masking characteristics of brightness, contrast, fovea and stereo depth, and the mathematical model of JND is established through experimental data, and compared with other current JND models. The results show that this model can remove more visual redundancy under the same perceptual quality. Then the visual perception redundancy model is applied to image compression. For this purpose, a multi-level compression algorithm is proposed. The algorithm performs different levels of color level quantization on different regions of the image according to the human eye color difference threshold. The quantization process which combines the Floyd-Steinberg error dithering algorithm can remove visual redundant data. Finally, the algorithm verification is completed on the FPGA (Field-Programmable Gate Array) hardware platform. The results show that the average bit compression rate of the algorithm can reach 61.65%, which can effectively reduce the amount of transmission data required for VR (Virtual Reality) images.

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    Yuan Ji, Zhijie Zheng, hao Wu, Yin Zhang, Wendong Chen, Tingzhou Mu. Foveated JND Model Based on Stereo Vision and Its Application in Image Compression with Hardware Implementation[J]. Acta Optica Sinica, 2021, 41(12): 1210001

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    Paper Information

    Category: Image Processing

    Received: Dec. 9, 2020

    Accepted: Jan. 22, 2021

    Published Online: Jun. 2, 2021

    The Author Email: Zheng Zhijie (18800203705@163.com)

    DOI:10.3788/AOS202141.1210001

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