Watermarking of Color Images in the Transform Domain

This paper represents a robust watermarking algorithm for Red, Green, and Blue (RGB) color images. First, G and B channels are transformed through Discrete Wavelet Transform and then the Discrete Cosine Transform is applied on HL sub-bands and some coefficients are selected as embedding positions. By this cascaded transformation, the system resistance will be guaranteed. The scheme is experienced against kinds of image processing operations. The results express the robustness of our watermarking algorithm against some usual image processing operations.

Keywords:

Discrete cosine transform , discrete wavelet transform , robustness , watermarking ,