| Summary: | 碩士 === 健行科技大學 === 資訊工程所 === 101 === Information hiding technique is intended to protect the security of messaging. Generally, secure confidential information transmission is via encrypting and hiding. In recent years, a variety of new technologies have been proposed in order to achieve better hiding capacity. However, techniques with reference points involved, such as Block Segmentation and Pixel-Value Differencing methods, usually face the problem of limited capacity because those points cannot be used to hide secret message. To improve this problem, we propose an approach based on modulus and multi-stage hiding approaches to increase the hiding capacity, meanwhile, keep high image quality. Due to the use of pixel value correction technique and the characteristic of a natural image that the pixel values of neighboring pixel are closed, we are able to achieve the goal. According to our experimental results, the capacity is effectively increased and high image quality is also retained. The proposed approach is suitable for those applications that need a great amount of hiding capacity.
|
|---|
