This paper presents a new compression technique and image watermarking
algorithm based on Contourlet Transform (CT). For image compression, an energy
based quantization is used. Scalar quantization is explored for image
watermarking. Double filter bank structure is used in CT. The Laplacian Pyramid
(LP) is used to capture the point discontinuities, and then followed by a
Directional Filter Bank (DFB) to link point discontinuities.