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Journal of Applied Sciences

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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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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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