Keywords: progressive image transmission, bit plane method, pixel interpolation, image coding, network applications
Received March 13, 2006; revised July 11 & September 5, 2006; accepted October 26, 2006.
Communicated by Shih-Fu Chang.
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Rong-Chi Chang, Timothy K. Shih* and Hui--Huang Hsu*
Department of Digital Media Design
Asia University
Taichung, 413 Taiwan
E-mail: roger@asia.edu.tw
*Department of Computer Science and Information Engineering
Tamkang University
Tamsui, 151 Taiwan
E-mail: {tshih; hhsu}@cs.tku.edu.tw
Progressive image transmission (PIT) transmits the most significant portion of a
picture, followed by its less important portions. The mechanism can be used in Webbased
applications while users are browsing images. However, most PIT methods use the
same pixel interpolation scheme for the entire picture, without considering the differences
among image blocks. This paper analyzes the efficiency of pixel interpolation
schemes and test several decomposition mechanisms. The contribution results in an
adaptive image transmission scheme, which takes the differences of picture portions into
consideration. Moreover, this study tested 200 pictures in different categories and parameters.
In consequence, the overall bit rates can be reduced significantly with good
PSNR values and user satisfaction. The visual result is superior to progressive JPEG on
both objective (quantitative) and subjective (human) measures. An error recovery procedure
is also implemented in case that the transmitted pictures need to be fully recovered.
Received March 13, 2006; revised July 11 & September 5, 2006; accepted October 26, 2006.
Communicated by Shih-Fu Chang.