An efficient coding technique for multi-transform image representation

Constrained image representation employing multi-transforms has been recently developed. An efficient coding technique is presented in this paper to code the multi-transform coefficients. An image representation example is presented employing the DCT-Haar combination. The bandlimited nature of the DCT and the Haar spectra allows the scheme to be similar to the JPEG baseline standard. Test subimages with high amount of detail represented using the proposed technique show a SNR improvement of about 3 to 4 dB over using DCT alone. Finally, images, coded at bit rates of 0.44 bits/pixel and 1.23 bits/pixel employing the proposed technique verify the good quality of reconstruction