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利用先验位图的无失真图像渐进传输 (英)

张真诚 1,2; 林珮瑜 2; 庄润洲 3
  

  1. 1. 逢甲大学资讯工程学系; 2. 国立中正大学资讯工程学系;
    3. 静宜大学资讯传播工程学系
  • 收稿日期:2008-09-16 修回日期:2008-11-26 出版日期:2009-01-25 发布日期:2009-01-25
  • 通信作者: 张真诚

Progressive Image Transmission for Lossless Images Using
Prior Bitmap

Chin-chen CHANG 1,2; Pei-yu LIN 2; Jun-chou CHUANG 3   

  1. 1. Department of Information Engineering and Computer Science, Feng Chia University;
    2. Department of Computer Science and Information Engineering, National Chung Cheng University;
    3. Department of Computer Science and Communication Engineering, Providence University
  • Received:2008-09-16 Revised:2008-11-26 Online:2009-01-25 Published:2009-01-25
  • Contact: Chin-chen CHANG

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摘要： 提出一种无失真图像逐步传输法，该方法改进了Chang等人的早期PIT方法. 原方法由于没有考虑到各图像区域的意义，解码初期的图像质量不够理想. 为此，提出以“优先位图”表示区域的复杂度，利用这种优先位图可在传输的初期就将图像的重要特征发送给接收方. 实验结果表明，该方法在峰值信噪比和视觉质量两方面均优于过去的无失真图像逐步传输方法.

关键词: 图像逐步传输法, 位图, BPM, IBPM

Abstract: In this paper, we describe a progressive-image-transmission (PIT) scheme based on block-based PIT for lossless images. It is inspired by a previous PIT method presented by Chang et al. Because the original method does not take the significance of each block into consideration, the quality in early stages of decoding is not desirable.To improve it, we propose an enhanced scheme in which a prior bitmap was used to indicate the complexity of each
block. Based on the prior bitmap, significant information of an image can be transmitted to receiver(s) in early stages of transmission. Experimental results show that the proposed scheme can achieve better results both in PSNR values and in visual quality than other former lossless PIT schemes.

Key words: progressive image transmission, bitmap, BPM, IBPM

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