作为一种数字水印的技术方法,提出了一种新的单幅图像可视隐藏方案.在该方案中,仅使用一幅加密图便能可视恢复密图,加密图本身既是编码又是解码.与已有的基于移位的方案不同,该方案通过加密图逆时针旋转90°后和自身的叠加来恢复原图.给出了实现单幅图像可视隐藏的新方案的设计方法,对方案的性能进行了分析,并且指出新方案具有较好的抗压缩性、抗破损性、抗放缩性,且能充分利用密图的容量.
For presenting a new technique of digital watermarking, a new scheme on hiding a secret image into single shadow image is proposed. Differ from any existed methods of visual hiding schemes using one secret image, the new scheme based on the rotation of the shadow image. In the new scheme, the single shadow image acted both encoder and decoder function. Therefore the secret image can be recovered by stacking the shadow image and the shadow image after rotated 90 degree anticlockwise. The new method has the property of anti-compression, anti-distortion and anti-shrink. Furthermore, the new scheme can use the shadow image sufficiently.