In the past

most image hiding techniques were applied only to gray scale images. Now

many valuable images are color images. Thus

it has become important to be able to hide color images. In this paper

an adaptive color digital image blind hiding algorithm is presented. A color scale secret image can be hidden in one color carrier image with the schemes. To increase the quantity of the embedded data

the hard c-means cluster and color quantization technology based on discriminative palettes can be used in the algorithm. In particular

in order to further enhance the security and robustness of the hidden image

the scrambling technology based on hyperchaotic mapping can be used as pre-process of color image information hiding. The coupled map lattices mapping is used to generate hyperchaotic sequences

and the secret image is encrypted by changed image pixels value and image pixels position. The initial parameters of hyperchaotic mapping can act as the private keys. The experimental results are satisfactory.