題名: Colour image-hiding scheme using human visual system 作者: Chang, C. C.;Chou, H.;Lin, C. C.
日期: 2006-09
上傳時間: 2009-12-17T06:58:16Z 出版者: Asia University
摘要: This paper proposes a spatial-domain image-hiding scheme for colour images. The objective is to conceal as much information of the secret image in the cover image as possible, while retaining the quality of the stego-image. This is achieved by manipulating colour images in the YUV colour space. The main idea is to embed the most significant bits of the Y and the quantized U and V components of the secret image in the Y components of the cover image pixels. To enhance the image quality, a threshold mechanism is adopted which takes the human visual effect into consideration. The experimental results demonstrate high peak signal-to-noise ratio, and show that the difference between the stego- image and the cover image is almost imperceptible. In the proposed scheme, the cover image can embed a secret image as large as two- thirds of the cover image size if the secret image is in the 4:2:0 format.
