An effective scheme for coding of arbitrarily shaped color visual objects is presented. Based on SPIHT, the proposed algorithm employs the SA-DCT at the place of DWT to code texture coefficients by using mask pixels in order to create an embedded code that allows for fine-grained rate-distortion scalability. The result of the proposed procedure is a multi-resolution, progressive reconstruction of the binary shape mask as well as the texture. This algorithm is compared with wavelet-based embedded coding of the object texture. Objective and subjective simulation results show that the proposed CSPIHT-SADCT scheme has excellent rate-distortion performance.
Discrete cosine transform, Discrete wavelet transform, image coding, shape adaptive, SPIHT