Embedded lossy image compression based on wavelet transform
International Symposium on VIPromCom Video/Image Processing and Multimedia Communications - Trang 195-199
Tóm tắt
This paper describes an algorithm for embedded lossy image compression based on the discrete wavelet transform (DWT) and the zerotree coding scheme (EZW). In this algorithm there are two lossy stages, a rounding operation after the transform and a truncation of the coding output. A comparative study of different filter banks (from different wavelet families and with different filter lengths) for the wavelet transform and different image scans for the encoding is presented. We show their impact in realistic image compression results for our algorithm, specially in compression ratio and reconstruction error.
Từ khóa
#Image coding #Wavelet transforms #Discrete wavelet transforms #Filter bank #Multiresolution analysis #Low pass filters #Image reconstruction #Computer errors #Embedded computing #Discrete transformsTài liệu tham khảo
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