Adaptive wavelet packet basis selection for zerotree image coding
Nasir Rajpoot, R. G. Wilson, François G. Meyer, Ronald R. Coifman · IEEE Transactions on Image Processing · 2003
Image coding methods based on adaptive wavelet transforms and those employing zerotree quantization have been shown to be successful. We present a general zerotree structure for an arbitrary wavelet packet geometry in an image coding framework. A fast basis selection algorithm is developed; it uses a Markov chain based cost estimate of encoding the image using this structure. As a result, our adaptive wavelet zerotree image coder has a relatively low computational complexity, performs comparably to state-of-the-art image coders, and is capable of progressively encoding images.