像素不扩展视觉密码的边缘增强研究

Edge Enhancement on Size Invariant Visual Cryptography

针对像素不扩展视觉密码的边缘恢复失真问题,在分析图像边缘特征的基础上,通过构造LP算子,设计了一种具有可变膨胀倍数的边缘增强算法,并给出了边缘增强的像素不扩展视觉密码方案的设计方法。实验结果表明,该方法有效地改善了边缘的恢复质量,并显著提高了整幅图像的视觉效果。

Considering the problem of edge distortion in size invariant visual cryptography,on the basis of analyzing the characteristics of the image edge,an LP operator was proposed to design an edge enhancement algorithm with variable edge expansion ratio,and the method to design edge enhancement size invariant visual cryptography was given.The experimental results show that the quality of recovery edge can be improved effectively.Furthermore,the whole image can also be significantly improved with better visual effects.